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Posts: 1586
From: Vancouver Island , British Columbia , Canada
Registered: Nov 2001

posted 05-29-2002 10:08 PM     Click Here to See the Profile for johnmustang   Click Here to Email johnmustang     Edit/Delete Message   Reply w/Quote
Took the rad cap off , ran the car in park until it got hot , put a thermometer in it and it ran up to 180 , then chalked up the tires put it in drive and let it idle in gear, the temp came up to 208 real quick so I went back to park feathered the throttle and the temp came down to about 190. I noticed that my by-pass hose has a slight pinch in it , not to bad , but , noticable , could this cause it to heat up some ? Also noticed that I have a gurgling sound coming out of the heater core , no leaks at all anywhere.Will this air lock ( which I assume is what the gurgling is ) cause me to over heat some what ? What is the proper way to burp the system to expell the trapped air ? I just don,t seem to get enough flow at idle. Would a high flow water pump be the answer to this problem ? Please give me as much feedback as you can , I need to get this figured out as my wife and I want to do a long trip this weekend , and , I don,t want to cook the motor. PLEASE HELP


Member:Vancouver Island Mustang Association
M&M #1710

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Posts: 1431
From: Vicksburg, MS
Registered: Dec 99

posted 05-30-2002 09:07 AM     Click Here to See the Profile for jkilroy   Click Here to Email jkilroy     Edit/Delete Message   Reply w/Quote
I'd say your problem is not fluid flow but rather air flow. Do you have a fan shroud?

Jay Kilroy
68' Fastback GT 390
"No such thing as a cam thats too big"

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Posts: 746
From: Athens,GA
Registered: Jul 2001

posted 05-30-2002 11:11 AM     Click Here to See the Profile for bluestreek   Click Here to Email bluestreek     Edit/Delete Message   Reply w/Quote

Take your rad. cap off and look for bubbles or foaming. Sometimes a bad head gasket seal can cause compression leakage into the water jacket. I hope this not the case.

A "sticking" thermostat can cause temps to climb, but since your temps drop when you rev the motor, that may not be the case.

A lean fuel condition can also cause your temps to climb. I always run mine a little rich, especially during break-in. A lean condition can cause a piston or ring to swell and lock up during a long extended run, so be careful.

Also a tightly built motor can take a while to break in and will have a tendency to overheat for about 500 miles. If this is the case, then a little careful break-in road time will help. A shroud and nothing but water in the cooling system will definately help during break-ins and hot weather.

Good luck!

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Posts: 4277
From: Reno Nv MEM#1240
Registered: Apr 2001

posted 05-30-2002 12:54 PM     Click Here to See the Profile for Fastymz   Click Here to Email Fastymz     Edit/Delete Message   Reply w/Quote
I burp my system by on doing the heater hose from the intake manifold,while I'm filling the rad,when the water starts to out of the the intake conection I place the hose back on.And then let the car get warm with the rad still off.I have some one rev, the motor after it's warm and the stat as open.And keep filling the rad,until it's full.


65 coupe,351w,C4,Big Boss 429 hood scoop,Crager SS,Black Suede.

Is that your scoop,or are just happy to see me.

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Posts: 42
From: Celina, Republic of Texas
Registered: Feb 2002

posted 06-03-2002 02:04 PM     Click Here to See the Profile for 64FalconF-16   Click Here to Email 64FalconF-16     Edit/Delete Message   Reply w/Quote
"Take your rad. cap off and look for bubbles or foaming. Sometimes a bad head gasket seal can cause compression leakage into the water jacket."

This happened to me a few years ago. On a tractor though. Losing compression into a water jacket heats the water up. More likely under a load than idling in park.

Look for the bubbles.

64 Pro-Street Falcon
351C 4V 8.1s in 1/8
79 Ford Bronco 4 X 4 Lifted 6"
400 9.9s in 1/8 :)
70 Plymouth Cuda'
440 Magnum. 2600#
Race Car 6.90 in 1/8

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Posts: 72
From: Milwaukee, WI
Registered: Dec 2001

posted 06-03-2002 10:45 PM     Click Here to See the Profile for Bloose   Click Here to Email Bloose     Edit/Delete Message   Reply w/Quote

My '68 Fairlane w/289 was running very hot when I first put the motor in. I was running a Holley 650. From what I can tell I was running way lean. I now have a Demon on there and am running slightly rich. The temp problem is way better. With the Holley (nothing specifically wrong with Holley but I couldn't get this one to work) it would run up to 230. With the Demon I run at 210 max. Could you be running lean?

BTW, I also have the B+M Super Cooler in front of the radiator. I still have a little way to go on the cooling thing but the lean carb seemed to be the biggest problem.


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