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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226261
05/02/12 10:05 PM
05/02/12 10:05 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
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It sounds like you have all the right stuff.  Even though you are happy with the way it runs, the solution your looking for, lies in the tune up. It could be better and your car will run cooler. Richen it up and see, it can't hurt and I bet helps on the highway.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: mikemee1331]
#1226263
05/02/12 10:07 PM
05/02/12 10:07 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
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Quote:
what type of water pump housing is it? i'm guessing aluminum? there were issues with the inlet being too small. 
the bigger question is what water pump , the CCJ housing even though it has restricted flow was not found to be a real huge problem , the CCJ pump is a different story .
Also your 26" rad , 2 row or 3 ?
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226266
05/02/12 10:19 PM
05/02/12 10:19 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
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Quote:
3 row rad
20 deg intial. .520/254 solid. Dist is locked, slots welded. I dont recall the total #.
Distributor is locked meaning no mechanical advance ? if so there is your problem , all you have is 20 degrees ...
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226267
05/02/12 10:32 PM
05/02/12 10:32 PM
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Joined: Dec 2007
Posts: 18,157
Mass
DAYCLONA
I Live Here
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Not too much information on the timing your running, or what type of dist/ignition, or the method of advance...same with the carb?, a lean condition can cause unnecessary heat? what are you doing to determine a lean/rich condition?.....seat of the pants feel is not a good lean/rich indicator, plug readings?, O2 readings?... As far as the mechanical end, IMHO I'd toss the clutch fan, run a factory 7 blade HD fixed fan, the space between the fan to radiator is not as important as how much blade area is inside the shroud, you should have at least 50%-75% of the fan buried inside the shroud for a proper pull, play around with different spacers to achieve the proper spacing, make sure you try and maintain at least 1" or more away from the radiator, as fixed fan blades at high RPMs can "flex" outward towards the radiator... As far as the Chemical end, I'd recommend ZEREX G-05 Antifreeze, distilled water 50/50 mix, and 8-10 oz. of REDLINE water wetter 
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Re: Running hot and running out of ideas 67 Belvedere
[Re: JohnRR]
#1226270
05/02/12 10:45 PM
05/02/12 10:45 PM
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Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
Rick_Ehrenberg
top fuel
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top fuel
Joined: Sep 2003
Posts: 1,688
Marlboro, NY, USA
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Quote:
Quote:
3 row rad
20 deg intial. .520/254 solid. Dist is locked, slots welded. I dont recall the total #.
Distributor is locked meaning no mechanical advance ? if so there is your problem , all you have is 20 degrees ...
Man, you need closer to 33-35 at 2,500 RPM or above, and 50-55 with vacuum. Not only is it heating up from the spark so late, but all that unburned fuel is killing the rings and cyl walls (fuel wash), and diluting the oil, not to mention making the Arabs rich!
Rick
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226272
05/02/12 11:34 PM
05/02/12 11:34 PM
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Joined: Jan 2003
Posts: 1,261
Phoenix, AZ
Belvedere1
OP
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OP
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Posts: 1,261
Phoenix, AZ
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Here is a little more info:
* MP electronic dist, chrome box. 20 deg initial, 16 mechanical, advance springs changed to one light and one heavy
* 800 Edelbrock carb, re-jetted and rods richened, larger needle and seat than box stock
* The plugs look spot on with no signs of too lean or rich and no detonation
* The head gaskets are correct, no cooling holes mis-aligned or blocked, that was all checked before final assembly
* Block was sonic checked before an .030 bore, plenty of material so the walls are not too thin
* The radiator has about 2700 miles since new and was cleaned before the new motor was assembled. 700-800 miles on the new motor. It was new from Year One.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226274
05/02/12 11:55 PM
05/02/12 11:55 PM
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Joined: Jan 2003
Posts: 2,111
Bowie, MD
Reggie
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,111
Bowie, MD
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Quote:
The fan clutch is sitting 7/8" - 1" away from the radiator and using a factory shroud.
That might be the problem. The fan should sit out enough from the edge of the shroud to pull cool through the radiator. Otherwise you're just blowing hot air around inside the shroud instead of pulling cool air through the radiator.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Rick_Ehrenberg]
#1226277
05/03/12 10:01 AM
05/03/12 10:01 AM
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Joined: Nov 2003
Posts: 3,426
Dandridge TN
Dabee
master
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master
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Posts: 3,426
Dandridge TN
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Quote:
Quote:
Quote:
3 row rad
20 deg intial. .520/254 solid. Dist is locked, slots welded. I dont recall the total #.
Distributor is locked meaning no mechanical advance ? if so there is your problem , all you have is 20 degrees ...
Man, you need closer to 33-35 at 2,500 RPM or above, and 50-55 with vacuum. Not only is it heating up from the spark so late, but all that unburned fuel is killing the rings and cyl walls (fuel wash), and diluting the oil, not to mention making the Arabs rich!
Rick
Quote:
Sorry, 20 initial and 16 mechanical. One heavy and one light advance spring.
Okay is it locked or unlocked? 
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226278
05/03/12 10:31 AM
05/03/12 10:31 AM
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Joined: Mar 2008
Posts: 5,746
Ontario, Canada
Dodgem
master
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Posts: 5,746
Ontario, Canada
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Time for a new rad I went through that years ago finally after some advice had new three rows installed and that was the end of my problems. A shroud helps too! Out of what carb, jets and power valve if applicable?
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226280
05/03/12 12:07 PM
05/03/12 12:07 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
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Posts: 5,161
CT
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Hook the vacuum advance up, I bet it runs cool
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Running hot and running out of ideas 67 Belvedere
[Re: GTX MATT]
#1226281
05/03/12 12:13 PM
05/03/12 12:13 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Cincinnati, Ohio
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Quote:
Hook the vacuum advance up, I bet it runs cool
Yup, why isn't it hooked up?
welding up the slots to limit timing is not locking it out, I think your confused on that point.
Why happens to your timing when you you have a timing light on it and you rev it up?
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Re: Running hot and running out of ideas 67 Belvedere
[Re: ThermoQuad]
#1226285
05/03/12 03:02 PM
05/03/12 03:02 PM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
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Quote:
220 degrees is warm, it is not hot.
Your thermostat opening temp is too low. Opening Temp has nothing to do with operating temp except to keep engine above a specified temp.
Disconnect the radiator trans cooler and just run the external one.
No need in the southwest for the radiator trans cooler.
Today's fuel requires a 195 degree thermostat.
Do not use water wetter-causes issues if left in too long.
60% water, 40 % antifreeze, bottle of "be cool"
Use the viscous fan and a thermostatic fan clutch, do not use direct drive or any aftermarket fan. It's in the book-the mopar book. I did not make this up. I think mother Mopar's Larry Shepard might have a clue so be careful with advice you get from the internet.
Your radiator core is suspect-the center tubes are probably restricted, so some diagnosis with IR temp gun will tell you everything you need to know before throwing mud at the wall. Cheap ones are at China Freight.
Did you read the part about the thermostat??? that's not an old wives tale.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Reggie]
#1226286
05/03/12 03:24 PM
05/03/12 03:24 PM
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Joined: Jan 2003
Posts: 27,465
So Cal
autoxcuda
Too Many Posts
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Posts: 27,465
So Cal
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Quote:
Quote:
The fan clutch is sitting 7/8" - 1" away from the radiator and using a factory shroud.
That might be the problem. The fan should sit out enough from the edge of the shroud to pull cool through the radiator. Otherwise you're just blowing hot air around inside the shroud instead of pulling cool air through the radiator.
The blades of the fan shroud be 1/2 in the shroud, 1/2 out of the shroud
Optimum fan to shroud total clearance is 10% of the shroud's diameter. The total clearance is both sides of the fan. So... 20" fan shroud should have 2" of total clearance. And that will be 1" on both sides of the fan.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: WheelsUp73]
#1226288
05/03/12 04:59 PM
05/03/12 04:59 PM
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Joined: Jan 2003
Posts: 1,261
Phoenix, AZ
Belvedere1
OP
pro stock
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OP
pro stock
Joined: Jan 2003
Posts: 1,261
Phoenix, AZ
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What is the wives tale on t-stats, I dont have the book??
Last edited by Belvedere1; 05/03/12 07:09 PM.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: ThermoQuad]
#1226289
05/03/12 05:28 PM
05/03/12 05:28 PM
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Joined: Jan 2003
Posts: 74,976
U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 74,976
U.S.S.A.
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Quote:
I think mother Mopar's Larry Shepard might have a clue so be careful with advice you get from the internet.
I think the words "MIGHT HAVE" should be changed to "SOMETIMES HAS" in this sentence ...
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Re: Running hot and running out of ideas 67 Belvedere
[Re: JohnRR]
#1226290
05/03/12 06:11 PM
05/03/12 06:11 PM
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Joined: Jan 2003
Posts: 5,890
Athens, Greece
Pyper70
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master
Joined: Jan 2003
Posts: 5,890
Athens, Greece
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I'll poke at this one only because it happened to my Dart once...My water temp was hitting 220 down the road...weird for a Slant 6 to have that happen. Everything was in tip top shape. I checked my Trans dipstick and I was a little low. I topped off the trans and got back to business as usual. I can only assume that the trans overheats and since it is aluminum and mated through a bell housing, you are heating up the coolant from the transmission side.
Have you run an A/F meter on it? make sure you have the right numbers through your powerband. The idle circuit is pointless...our cars don't sit at idle most of the time... you have to get out there to test and tune.
Not to hijack the thread but I have a 440, AC pump, factory cast iron housing and cast pump. 10:1, Eddy heads, Dual 500cfm Carbs. 26inch 4 core radiator, tranny cooler, 7-blade with viscous, 180º Napa stat (Mr Gasket are trash, bad QA). I even threw in Water Wetter. I know I have some test and tune because I just got my RPM heads on but I hit 180º driving down the road and 195º in traffic.
I have no vacuum advance. Its a mechanical dizzy. Are you sure your dizzy is setup correctly?
Family owned 1969 Charger R/T DualQuad 440/727/GVO/3.55s
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226292
05/03/12 07:22 PM
05/03/12 07:22 PM
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Joined: Jun 2006
Posts: 5,161
CT
GTX MATT
master
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master
Joined: Jun 2006
Posts: 5,161
CT
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It sounds like it probably it, but you should still run the vacuum advance. Just give it a try and see if it stops overheating.
Now I need to pin those needles, got to feel that heat
Hear my motor screamin while I'm tearin up the street
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226293
05/03/12 07:46 PM
05/03/12 07:46 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
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Senior Management
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Irving, TX
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You've spent a lot of money on this car. Now go spend $39 dollars for a tool.
Go to Harbor Freight and buy an IR temp gun.
Get the car up to temperature.
Measure the temperature of the water neck.
Measure the temperature of the radiator where the upper hose goes in. It should be very close to the temp of the water neck, assuming the thermostat is open.
Measure the radiator where the lower hose goes out.
There should be a minimum of 30 degrees temperature drop in the radiator. If not, measure the temp of the radiator core in a grid.
Measure every couple inches across the top of the core.
Drop two inches and measure across again.
Repeat until you've measured the whole core.
The temp drop should be gradual. If you have any cold spots the core is plugged.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226295
05/04/12 12:20 AM
05/04/12 12:20 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
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Senior Management
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Posts: 28,067
Irving, TX
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http://www.harborfreight.com/non-contact-laser-thermometer-96451.html $39.99. Sure, there may be better units out there but what you're looking for is a noticeable change in temperature. When my Imperial had a clogged radiator there were areas where the temperature dropped almost 50 degrees lower than surrounding bits of the radiator.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226297
05/04/12 12:33 AM
05/04/12 12:33 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
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Before you start changing parts, grab the temp gun and check things out.
Putting a little distance between the trans cooler and radiator may help a wee bit.
I'm not a fan of attaching things to the radiator core.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: feets]
#1226299
05/04/12 02:05 AM
05/04/12 02:05 AM
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Joined: Jan 2003
Posts: 27,465
So Cal
autoxcuda
Too Many Posts
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So Cal
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Quote:
Before you start changing parts, grab the temp gun and check things out.
Putting a little distance between the trans cooler and radiator may help a wee bit.
I'm not a fan of attaching things to the radiator core.
I agree. Check with the IR gun. They really come in handy. But they don't read very well of shiny surfaces. Like a polished aluminum radiator or chrome headers.
Sure optimum is the fan blades 1/2 inside the shroud edge. But I don't think 1/3 in would cause all the problems you are having.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: ThermoQuad]
#1226300
05/04/12 03:04 AM
05/04/12 03:04 AM
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Joined: Jan 2003
Posts: 27,465
So Cal
autoxcuda
Too Many Posts
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Too Many Posts
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Posts: 27,465
So Cal
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"Antifreeze" does not cool as well as water or water with additive. "Antifreeze" has many properties. Many of those properties are accomplished by the additives blended with the Ethelyne Glycol (the part that resists freezing). The property of resistance to freezing in "Antifreeze" is not a needed by Belvedere1 and those few who live in his same climate. Now those living in colder climates (most), you do need resistance to freezing in winter from antifreeze. No need to debate that. Now, those few who don’t need the resistance to freezing in their car still need the additives in their cooling systems for protection. The Justice Brothers Radiator Super Cooler (RC/22P) has an additive package formulated to include properties for: water pump lubrication, anti corrosives, Supplemental Coolant Additives (SCA's), surfactants, stop rust, resisting acid formation, anti foaming to name a few. Here's a fairly thorough conducted test of cooling additives in regards to temperature: http://www.turbomagazine.com/feature...s/viewall.html From test: Quote:
Justice Brothers' Radiator Cooler gave us the lowest temperature during our testing - 177 F - and provided the lowest average temperatures overall when mixed with water alone.
In the case of Belvedere1 , I personally would like to recommend also adding a bottle of Cooling System Protector (CSP/1P) when running straight distilled water and a large system. It has additional SCA's, water pump lubrication, corrosion inhibitors and acid neutralizers. It also contains special metal deviators that act as a ground strap between dissimilar metals like the many aluminum to cast iron to brass to rubber transitions. That gives extra electrolysis and anti rust protection as additives get depleted over time over a large area.
Check electrolysis with a digital voltmeter. Attach the ground to the radiator body. Then float the positive lead in the radiator fluid mixture. You should not have more than about .3 volts.
We all run sealed ZZ4 crate motors per class rules in the circle track car I crew on. I have seen guys that use Redline water wetter spit brownish water on a hot day. The track approved engine rebuilder stated our motor's coolant passages using Justice Brothers additive had no corrosion whereas the Redline users didn't look as clean.
Steve Wall
Regional Sales Representative
Justice Brothers High Point Distributing
www.justicebrothers.com
stevewall68@gmail.com
Last edited by autoxcuda; 05/04/12 03:20 AM.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226301
05/04/12 08:43 AM
05/04/12 08:43 AM
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Joined: Jan 2003
Posts: 24,562
Brookeville, Md
Mr.Yuck
Not enough dumb comments...yet
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Not enough dumb comments...yet
Joined: Jan 2003
Posts: 24,562
Brookeville, Md
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Quote:
Thanks for the info there. I just went to go over some of the suggestions and I would say that only about 25-30% of the fan blade is in the shroud so now I am thinking I may need to search for a clutch fan spacer to sink the fan in a little further. I still have some room to be safe with clearance between the rad and the fan clutch.
Also, the trans cooler is mounted directly to the radiator with the zip ties from the cooler kit. I never really liked that setup but thought it would be ok but now I am not sure that is ideal for allowing the radiator to fully do its job. I will do some further investigating this weekend.
Thanks all.
I've run the cheap Summit plastic 18.5" fan in the last few 440's. I think w/ a 1.5" spacer... they work great car runs cool and the weight a few ounces PLUS you won't cut your fingers to heck working around them.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: autoxcuda]
#1226302
05/04/12 12:58 PM
05/04/12 12:58 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
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Senior Management
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Irving, TX
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With all due respect, I doubt seriously what's in his radiator is the root cause.
Maybe something will run 10 degrees cooler than something else but he should see a larger drop.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: feets]
#1226303
05/04/12 01:54 PM
05/04/12 01:54 PM
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Joined: Jan 2003
Posts: 27,465
So Cal
autoxcuda
Too Many Posts
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Posts: 27,465
So Cal
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Quote:
With all due respect, I doubt seriously what's in his radiator is the root cause.
Maybe something will run 10 degrees cooler than something else but he should see a larger drop.
 on the root cause.
Either a combination of small stuff, radiator blockage, or a tuning issue.
Wonder if cam duration 254 @.050 with 3.75 stroke, 9.5 converter, rear gear factor in here???
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Re: Running hot and running out of ideas 67 Belvedere
[Re: autoxcuda]
#1226304
05/04/12 07:36 PM
05/04/12 07:36 PM
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Joined: Feb 2005
Posts: 551
LA & L.A.
MoparPosterChild
mopar
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mopar
Joined: Feb 2005
Posts: 551
LA & L.A.
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Is your radiator aluminum? If it is try shining a flashlight through the front of it. If you can't see any light coming through the other side, you need a new radiator. Those aluminum ones will go bad if they get too hot just one time. I'm on my 3rd one in one of my cars. Took forever to figure it out.
2018 Dodge DEMON #18
1970 Plymouth Duster 406" Stroker
1969 Charger 500" Stroker
1964 Dodge Polara 426 GEN III HEMI
1970 Plymouth Cuda Hellcrate Project car
1974 Dodge Ramcharger Project car
2017 Chrysler Pacifica Limited
2017 Ram 3500
2012 Dodge Caravan R/T
1972 Charger Mopar 392 HEMI Stolen
2008 Challenger SRT-8 Gone
2010 Challenger SRT-8 Gone
2006 Charger SRT-8 Gone
2007 Charger R/T Gone
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226307
05/05/12 12:41 AM
05/05/12 12:41 AM
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Joined: Nov 2011
Posts: 2,154
Its a TRAP!
DARTH V8Я
Oh No!! I just had a moron attack!
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Oh No!! I just had a moron attack!
Joined: Nov 2011
Posts: 2,154
Its a TRAP!
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Can you turn the clutch fan by hand with the engine hot? There should be ALOT of resistance.
When it takes more than a sweet mullet to prove you rule at the trailer park..
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226309
05/05/12 01:50 AM
05/05/12 01:50 AM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
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Senior Management
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Irving, TX
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It looks like the radiator is doing a fair job. 34 degrees is good. I'd like to see a bigger drop but wouldn't we all?
Did you check for any cold spots in the core?
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226311
05/05/12 02:06 AM
05/05/12 02:06 AM
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Joined: Jan 2003
Posts: 10,704
North Dakota
6PakBee
I Live Here
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I Live Here
Joined: Jan 2003
Posts: 10,704
North Dakota
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Reading through this post reminds me of the time I fought an overheating problem with a '72 400 in a Newport. After going through all the usual details and coming up short, it turned out to be a glazed fan belt. Fan and pump never came up to speed. You never know.
"We live in a time when intelligent people are being silenced so that stupid people won't be offended".
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226313
05/05/12 08:57 AM
05/05/12 08:57 AM
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Joined: Jan 2007
Posts: 7,664
IN
ahy
master
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master
Joined: Jan 2007
Posts: 7,664
IN
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Quote:
Nothing to speak of really maybe 2-3 degrees of variation moving across the core in a row type pattern. I am thinking I need to sink the fan in a little closer to rad after looking more closey at things.
I would also like to get the trans cooler mounted independent of the rad core, I cant help but think that would help.
Also looked into different pulley diameters but I am not seeing anything out there in a stamped steel, stock type water pump pulley other than what was on all big blocks of that era. I need to research that more.
On the drive ratios, as original there was a "with AC" setup that provided overdrive and used a "with AC" WP and a standard setup without the overdrive and matching WP. The overdrive "with AC" was significant. Something like 20-25% from memory.
I wound up with about 7% WP overdrive using repop steel pulleys from Bouchillon on the accessories and a 6" aluminum 4 groove crank pulley from March. The standard steel crank pulley is 7" or 71/4" on most models. I used the smaller crank pullley to slow things down a little on my faster than stock spinning engine.
Reading the update on your testing... it sounds like it gets hot at idle and will not cool off on a roll. You have both "hot at speed" and "hot at idle". Temps on the radiator are pretty consistant so it doesn't have any obvious signs of blockage.
On a roll over 40 MPH, the fan basically doesn't matter. Since you have "hot at speed" there is something going on with the radiator, WP or engine itself. It sounds like the engine block was well cleaned so rule that out. Tuneup with mechanical advance OK. Vacuum advance would help. The high stall convertor and big cooler required adds to the heat load. Mounting the trans cooler independantly would take some stress off the radiator. It may help cooling a little but not a big impact.
How about some more specifics on the WP and radiator? Type and brand of WP and thickness and age and brand of the radiator? Did it always run hot or did it happen over time or after a change? I'm thinking your setup and location just has very high cooling requirements and you need a really high capacity radiator and WP to keep up.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: DARTH V8Я]
#1226315
05/05/12 10:42 AM
05/05/12 10:42 AM
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Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1
Too Many Posts
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Too Many Posts
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
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Quote:
Can you turn the clutch fan by hand with the engine hot? There should be ALOT of resistance.
This is a very real possibilty, it happened to me. New fan clutch and it was back to normal.
Good luck with it.
I'm betting it a at least a couple factors, not just one.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Dabee]
#1226317
05/05/12 02:22 PM
05/05/12 02:22 PM
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Joined: Jan 2003
Posts: 28,067
Irving, TX
feets
Senior Management
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Senior Management
Joined: Jan 2003
Posts: 28,067
Irving, TX
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He verified that his radiator is doing it's job. There's no need to look at replacing it.
He needs to find the source of the heat.
A loose converter dumping trans heat into the radiator or blown head gasket would easily cause that problem.
We are brothers and sisters doing time on the planet for better or worse. I'll take the better, if you don't mind.
- Stu Harmon
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Re: Running hot and running out of ideas 67 Belvedere
[Re: feets]
#1226320
05/05/12 03:28 PM
05/05/12 03:28 PM
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Joined: Nov 2003
Posts: 3,426
Dandridge TN
Dabee
master
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master
Joined: Nov 2003
Posts: 3,426
Dandridge TN
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Quote:
He verified that his radiator is doing it's job. There's no need to look at replacing it.
He needs to find the source of the heat.
A loose converter dumping trans heat into the radiator or blown head gasket would easily cause that problem.
I wasn’t suggesting he replace his radiator. I know he said he had good a temperature drop cross the radiator. I was just relating a similar experience with my car hoping it would help him out. I also had a 30 degree plus drop across the radiator but it still wouldn’t cool. When I installed the new radiator and electric fan I left everything else the same. I am convinced even though the three core radiators fin design was inferior installing the electric fan is what cured my cooling problem.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Dabee]
#1226321
05/05/12 06:07 PM
05/05/12 06:07 PM
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Joined: Nov 2005
Posts: 210
mass,usa
sickhemi
enthusiast
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enthusiast
Joined: Nov 2005
Posts: 210
mass,usa
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did you paint the radiator?
1968 gts 355 r3 six speed efi with irs in progress and 1969 convt 440 stage 6 efi 5spd dana
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Challenger 1]
#1226323
05/05/12 06:42 PM
05/05/12 06:42 PM
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Joined: Jan 2003
Posts: 2,111
Bowie, MD
Reggie
top fuel
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top fuel
Joined: Jan 2003
Posts: 2,111
Bowie, MD
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Quote:
Quote:
Can you turn the clutch fan by hand with the engine hot? There should be ALOT of resistance.
This is a very real possibilty, it happened to me. New fan clutch and it was back to normal.
Good luck with it.
I'm betting it a at least a couple factors, not just one.
I've seen a bad fan clutch cause overheating before too, so that's another possibility. A guy came into my Dad's gas station with a Chrysler that was overheating. The fan was barely turning while the engine was running.
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Re: Running hot and running out of ideas 67 Belvedere
[Re: Belvedere1]
#1226324
05/05/12 06:48 PM
05/05/12 06:48 PM
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Joined: Nov 2005
Posts: 210
mass,usa
sickhemi
enthusiast
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enthusiast
Joined: Nov 2005
Posts: 210
mass,usa
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do you have headers on the car and are they uncoated. if the car is running lean at idle it the headers will get real hot
1968 gts 355 r3 six speed efi with irs in progress and 1969 convt 440 stage 6 efi 5spd dana
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Re: Running hot and running out of ideas 67 Belvedere
[Re: 6PakBee]
#1226330
06/14/12 07:49 AM
06/14/12 07:49 AM
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Joined: Jul 2003
Posts: 1,212
Canton, Ohio
Crazy68Dart
pro stock
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pro stock
Joined: Jul 2003
Posts: 1,212
Canton, Ohio
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Hi, here is a write-up I did on my 383 cooling issues. You mentioned you are using the 6-vane pump, you might want to get the 8 vane version. The 6-van is used with an A/C car with a smaller pully, which spins the pump harder. The 8-vane pump is used with a slightly larger pulley on a non-A/C car. Which pulleys are you running? You problem to me sounds either coolant flow related or more likely airflow related (especially considering your clutch fan is not doing the job). This thread is now "archive status", which means no pics, which sucks... if you want the pics of the pump I can dig them up. http://www.bigblockdart.com/forum/archive/index.php/t-20229.html
383, Hemi 4-Speed, AlterKtion, D60
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