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NOT COOL!!! #1437067
05/15/13 08:31 PM
05/15/13 08:31 PM
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Posts: 168
Loves Park, IL
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HotRodRailroader Offline OP
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Loves Park, IL
Well I started having some cooling issues with my 69 RR built 440 with cooling last year. Problem would occour when the ambient temps were about 75 or warmer. A few days ago I drove in 55 degree weather and it started getting hot. I do not currently run a thermostat in the car. The thing that has me confused is that there was so much pressure in the upper and lower hoses I could not even squeeze them a small bit. Tested the cap and the cap actually tests bad but for not holding enough!! Water flows like crazy when I had tested this before. Is it time for a new radiator? possibly aluminum? If so is Smith's a good brand?? Thanks I know multiple questions!!!!

Re: NOT COOL!!! [Re: HotRodRailroader] #1437068
05/15/13 08:37 PM
05/15/13 08:37 PM
Joined: Nov 2005
Posts: 15,118
85086
moparpollack Offline
Lil Herman
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Cooling problems come from more than just radiators, what is the timing set at? Is it rich or lean? Maybe the water is running water too fast thru the radiator try running a thermostat.

BTW Lodi apples are the bomb!


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: NOT COOL!!! [Re: moparpollack] #1437069
05/15/13 08:43 PM
05/15/13 08:43 PM
Joined: Mar 2006
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northeast ohio
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hulmule Offline
pro stock
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northeast ohio
you need to run some type of stat. helps slow the water down and gives it time to cool thru rad. the other thing I learned is you want the motor to run at a constant temp and with a stat it regulates that. You aren't running straight water are you?? that's a no no .


1969 Dodge Coronet R/T Convertible
1979 LiL Red x2
2012 Yellow Jacket
2006 mega cab
1977 Trailduster
1979 Trailduster
Re: NOT COOL!!! [Re: HotRodRailroader] #1437070
05/15/13 08:46 PM
05/15/13 08:46 PM
Joined: Feb 2005
Posts: 28,312
Cincinnati, Ohio
Challenger 1 Offline
Too Many Posts
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Cincinnati, Ohio
Why no thermostat? I'd put one in there before buying a new radiator. Put a 195 in there and I bet it's better.

Another thing that causes cars to run hot is tuneup, not enough timing or fuel. One or the other or both.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437071
05/15/13 08:55 PM
05/15/13 08:55 PM
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Posts: 36,040
Lincoln Nebraska
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RapidRobert Offline
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The stiff hoses makes me think possible slight combustion leak into the cooling system (head gasket). I'd highly suggest a stat but that's not what's causing the problem at hand


live every 24 hour block of time like it's your last day on earth
Re: NOT COOL!!! [Re: RapidRobert] #1437072
05/15/13 09:04 PM
05/15/13 09:04 PM
Joined: Nov 2005
Posts: 15,118
85086
moparpollack Offline
Lil Herman
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I didn't want to tell him that.


56 Plaza 63 D100 step side 67 Coronet, 68 Roadrunner, 69 Super Bees, 69 Coronet 500 convertible, 70 Roadrunner Post, 79 D150 360, and a severe case of Mopar a,d,d
Re: NOT COOL!!! [Re: HotRodRailroader] #1437073
05/15/13 10:18 PM
05/15/13 10:18 PM
Joined: Jul 2012
Posts: 168
Loves Park, IL
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HotRodRailroader Offline OP
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Loves Park, IL
Ok looks like I need to run a compression test. This car has the timing perfectly set and I run a restrictor in the system (basically hollowed out thermostat) Looks like I will be running a compresstion test. This problem seems to be getting slightly worse as it goes on. Thanks for all the advice.
PS mix is 50/50 perfectly

Re: NOT COOL!!! [Re: HotRodRailroader] #1437074
05/15/13 11:05 PM
05/15/13 11:05 PM
Joined: Dec 2004
Posts: 10,549
Rittman Ohio
fourgearsavoy Offline
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Rittman Ohio
First thing we have to know is how hot is it??? What kind of gauge do you have on it? Are the hoses hard to squeeze after just a few minutes or when it's at operating temp? How old is the radiator? Is it the old clogged original or is it new?
Sorry if I didn't see any of this information listed but we need ALL the facts to make a correct diagnosis instead of just spit-balling possible causes.Over heating to me is 230 degrees without coming down
Gus


64 Plymouth Savoy
493 Indy EZ's by Nick at Compu-Flow
5-Speed Richmond faceplate Liberty box
Dana 60
Re: NOT COOL!!! [Re: fourgearsavoy] #1437075
05/15/13 11:20 PM
05/15/13 11:20 PM
Joined: Jan 2003
Posts: 12,043
State of Confusion
hp383 Offline
Just a normal tag again
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Can you take the car to a local radiator shop? They should have the gizmo that attaches to the radiator cap port, and will test for compression gasses in the coolant.

You may not be able to see the leak with a compression test.


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Re: NOT COOL!!! [Re: hp383] #1437076
05/16/13 11:35 AM
05/16/13 11:35 AM
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Loves Park, IL
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HotRodRailroader Offline OP
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Loves Park, IL
Oops sorry forgot to list a few things. Well the car seems to run great at 180 but then when it hits about 185 it will start to contunue to climb sometimes as high as 205. That enturn gives me fuel problems and then I have to sit and wait after it stalls out. The pressure seems to be fairly soon after it runs I had never noticed it before. It is the old steel radiator that is in it.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437077
05/24/13 06:32 PM
05/24/13 06:32 PM
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Loves Park, IL
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HotRodRailroader Offline OP
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OK been working a ton lately. Got out to check the car and NO COMBUSTION GASES!!!! YAY!!!! So I have good headgaskets. I am getting a white looking foam and I do know the coolant needs to be flushed but I had just done this last summer and it is already rusty. Im guessing Im just having major radiator issues. OR am I wrong??

Re: NOT COOL!!! [Re: HotRodRailroader] #1437078
05/24/13 08:11 PM
05/24/13 08:11 PM
Joined: Nov 2007
Posts: 1,522
Orleans, Ontario
moparcanuk Offline
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Orleans, Ontario
I have to run a 160 stat in mine. A 195 makes it overheat.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437079
05/24/13 08:57 PM
05/24/13 08:57 PM
Joined: Mar 2005
Posts: 2,060
Pendleton NY
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terzmo Offline
top fuel
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Pendleton NY
hot in traffic or down the road ?

Re: NOT COOL!!! [Re: terzmo] #1437080
05/24/13 09:26 PM
05/24/13 09:26 PM
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Loves Park, IL
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HotRodRailroader Offline OP
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Currently just have a restrictor no stat at all. And it is worse when stopped but will do it while going down the road as well.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437081
05/24/13 09:55 PM
05/24/13 09:55 PM
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Lincoln Nebraska
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RapidRobert Offline
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Are you having an issue with it hitting 205 or is it that when it gets hot enough to stall it happens to be at ~205? as 205 ain't terrible. Are you running gasahol (10% ethanol alcohol) which can act up at 205. plus alot of temp gauges are not dead on accurate. I would toss the restrictor & use a 180/185 stat & if the real problem is the stalling then we can attack that. More info please. & does it get to 205 & shut down or does it get ever cooler on the highway OR around town?


live every 24 hour block of time like it's your last day on earth
Re: NOT COOL!!! [Re: RapidRobert] #1437082
05/24/13 10:13 PM
05/24/13 10:13 PM
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Posts: 168
Loves Park, IL
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HotRodRailroader Offline OP
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205 happens to be where it stalls out. it will start getting up to 200 at 55mph on a country road at 75 F outside. I usually run 93 oct. with no ethanol mixed with half tank of 110 oct. This car just seems to run great at about 170 and I have checked calibration on my guage and it seems to be really close.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437083
05/24/13 10:25 PM
05/24/13 10:25 PM
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Lincoln Nebraska
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RapidRobert Offline
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Alright, I'm assuming the mixture/timing are in the ballpark. Overheating at speed is a water flow issue unless the grill setup is extremely restrictive blocking airflow which is rare & I dont think thats the case here. I would toss the restrictor for 1 day which will tell you if it is restricting water flow too much. I'm assuming the lower hose ain't collapsing. Sounds like it may need more radiator (not enough capacity or partly restricted). Seeing good flow at idle can be misleading. Holler how it goes. PS good to hear no combustion gasses


live every 24 hour block of time like it's your last day on earth
Re: NOT COOL!!! [Re: RapidRobert] #1437084
05/24/13 11:03 PM
05/24/13 11:03 PM
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Posts: 168
Loves Park, IL
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HotRodRailroader Offline OP
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Loves Park, IL
Ill get rid of the restrictor this weekend and let everyone know! I really appreciate all the help! Both hoses were building pressure. My money is now on a junk radiator and thinking of going with a Smiths.

Re: NOT COOL!!! [Re: HotRodRailroader] #1437085
05/24/13 11:11 PM
05/24/13 11:11 PM
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Lincoln Nebraska
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RapidRobert Offline
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My original 3 row core OE 65 dart SB rad sprung a leak & a tin of coarse ground pepper from the Quik Shop on the way home fixed it for a year! then it sprung another leak in another location so I bought an eBay Champion 2 row direct fit aluminum radiator & I had to redrill 1 mounting hole on one side & it cools good (nothing to brag about on a DD 318 though) & no leaks & was ~ $189 iirc including shipping. I'd by another Champion rad in a heartbeat

Last edited by RapidRobert; 05/24/13 11:13 PM.

live every 24 hour block of time like it's your last day on earth
Re: NOT COOL!!! [Re: HotRodRailroader] #1437086
05/24/13 11:25 PM
05/24/13 11:25 PM
Joined: Aug 2003
Posts: 43,007
Bend,OR USA
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Cab_Burge Offline
I Win
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Bend,OR USA
Quote:

Ill get rid of the restrictor this weekend and let everyone know! I really appreciate all the help! Both hoses were building pressure. My money is now on a junk radiator and thinking of going with a Smiths.


It sounds like to me that the radiator is getting plug up I use to take a garden hose to flow test all radiators before using them, 1/2 or 5/8 inch garden hose with 60 lbs of water pressure stuck into the upper radiator hose(radiator out of the car) with the radaitor cap on and the lower hose off and turn the faucet on full blast, if the water ran out of the bottom outlet as fast or faster than the hose forced the water in for 3 to 5 minutes I figured the radaitor was good If it backed up and started coming out of the top hose hole in three minutes or less, it went to the radaitor shop for cleaning out or a new core That test was recommended to me by a very good old radaitor guy, he said always test it that way before bringing it to me


Mr.Cab Racing and winning with Mopars since 1964. (Old F--t, Huh)
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