Re: 505 Overheating!!
[Re: Shatar4]
#2171874
10/11/16 12:55 AM
10/11/16 12:55 AM
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Joined: Sep 2015
Posts: 1,096 Australia
ozymaxwedge
super stock
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super stock
Joined: Sep 2015
Posts: 1,096
Australia
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I have a 528 on the street in a Cuda, block is half filled and I had the same problem, the car will idle all day in the summer and sit on 175f but on the highway at 65mph it will creep up. One thing I have done is set up an engine oil cooler after seeing 260f on the oil temp gauge, that helped a lot but there is still work to do. Im at 35 total with twin fans and electric pump.
1963 Plymouth Max Wedge 1971 Barracuda
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Re: 505 Overheating!!
[Re: peter]
#2171963
10/11/16 06:26 AM
10/11/16 06:26 AM
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Joined: Jan 2008
Posts: 2,592 None
71rm23
master
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master
Joined: Jan 2008
Posts: 2,592
None
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Early 440 source pump housing had a bad design water galleries. ..i had one a toss it in the bin. I heard that but supposedly fix it. I know a few people who has their pump now with no issues, just saying. Not sure where my pump came from, my builder got it
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Re: 505 Overheating!!
[Re: Shatar4]
#2172057
10/11/16 12:00 PM
10/11/16 12:00 PM
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Joined: Jan 2003
Posts: 75,071 U.S.S.A.
JohnRR
I Win
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I Win
Joined: Jan 2003
Posts: 75,071
U.S.S.A.
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Its the shroud , Dartgirl had the same problem with her 70 RR , it was fine at idle but on the road it would get too hot , it was the aftermarket shroud. Put a 180 thermo in it , the 160 is nothing more than a flow restriction once the engine warms up ... open all the time.
running up my post count some more .
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Re: 505 Overheating!!
[Re: JohnRR]
#2172149
10/11/16 02:02 PM
10/11/16 02:02 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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What Ahy and John said, I would pull the schroud/fan assy & start it up cold & head out to the highway. it'll be warmed up by the time you get out there & see what develops. EDIT keep an eye on temps on the way home since there is very little low speed cooling (pull over for a cooldown if needed)
Last edited by RapidRobert; 10/12/16 01:04 PM.
live every 24 hour block of time like it's your last day on earth
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Re: 505 Overheating!!
[Re: Shatar4]
#2173199
10/12/16 10:28 PM
10/12/16 10:28 PM
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Joined: Nov 2003
Posts: 36,041 Lincoln Nebraska
RapidRobert
Circle Track
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Circle Track
Joined: Nov 2003
Posts: 36,041
Lincoln Nebraska
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I'm anxiously awaiting resolution on this one
live every 24 hour block of time like it's your last day on earth
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Re: 505 Overheating!!
[Re: RapidRobert]
#2173434
10/13/16 09:30 AM
10/13/16 09:30 AM
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Joined: Dec 2013
Posts: 4,693 Wichita
GY3
master
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master
Joined: Dec 2013
Posts: 4,693
Wichita
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I have a 505 and drive it everywhere with a very simple setup:
440Source pump and housing Original '65 manual transmission radiator Mopar clutch fan with Hayden Jaguar clutch (shorter for clearance) 36° total timing that, for the most part, is locked out.. No thermostat No fan shroud
Car never overheats, even when hotlapping at the track. It will creep over 200°F on the highway at 70mph but never gets higher.
The 440Source pump is a scapegoat as is the b.s. about water not staying in the radiator long enough to get cooled off!
'63 Dodge 330 11.19 @ 121 mph Pump gas, n/a, through the mufflers on street tires with 3.54's. 3,600 lbs. 10.01 @ 133mph with a 250 shot of nitrous an a splash of race gas. 1.36 60 ft. 3,700 lbs.
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Re: 505 Overheating!!
[Re: RapidRobert]
#2173471
10/13/16 10:57 AM
10/13/16 10:57 AM
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Joined: Jan 2008
Posts: 2,592 None
71rm23
master
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master
Joined: Jan 2008
Posts: 2,592
None
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I'm anxiously awaiting resolution on this one X2
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Re: 505 Overheating!!
[Re: Shatar4]
#2173486
10/13/16 11:18 AM
10/13/16 11:18 AM
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Joined: Jan 2004
Posts: 9,066 Eugene, Oregon
minivan
master
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master
Joined: Jan 2004
Posts: 9,066
Eugene, Oregon
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Based on your pic your my vote is your shroud is blocking air flow when moving...
Last edited by minivan; 10/13/16 11:19 AM.
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Re: 505 Overheating!!
[Re: Shatar4]
#2173901
10/13/16 07:00 PM
10/13/16 07:00 PM
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Joined: Jul 2011
Posts: 960 Chicago
PurpleBeeper
super stock
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super stock
Joined: Jul 2011
Posts: 960
Chicago
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There are some very intelligent posts here & some reasonable (but wrong) guesses. I worked through a non-stoked 440 cooling problem very similar to yours last month & I'm also running a 26" 3-row Champion now. I was overheating with a 3-core C-body brass w/factory fan/shroud & two pusher fans in front.
Anyway... back to your issue.
If you overheat at speed, but not at idle then you have one of the following:
1. electric fans actually HURTING your airflow at speed (was my problem). 2. radiator is plugged up (unlikely if it's new) 3. cavitation (which I have personally never seen in a BB Mopar). 4. lower radiator hose missing a spring (common with cheap hoses).
Personally, I believe your problems will go away if you put a modified factory fan shroud on that Champion radiator, the correctly spaced water pump (fan 1" from radiator, no more) and a stock-type fan (not a flex fan).
The coolant that cools the best is water (+ water wetter for iron heads or Lucas/Royal Purple for aluminum heads).
Thermostat does not affect how hot you run in most cases, but you can increase your coolant flow (sometimes helps) by removing the thermostat. I have personally never seen the need to run a "coolant restrictor" like they do in some Chevy's & I've run many motors without thermostats.
Last edited by PurpleBeeper; 10/13/16 07:01 PM.
70 Roadrunner convt. street car
440+6, NOS, 4-spd, SS springs
'96 Mustang GT convt. street car
'04 4.6 SOHC, NOS, auto, lowered
"Officer, that button is for short on-ramps"
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