Author Topic: OVER HEATING  (Read 281 times)

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Offline llb8563

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OVER HEATING
« on: June 20, 2020, 12:08:06 AM »
 HAVE A 1977 TRANS AM THAT IS STOCK WITH A 400 MANUEL 4 SPEED WE PUT A WHOLE NEW COOLING SYSTEM IN IT LAST  YEAR NEW CLUTCH FAN OVERSIZE ALUMINUM RADIATOR AND WATER PUMPAND IT STILL PEGS OUT THE GAUGE AT 220 IT DOES NOT BUBBLE OUT BUT YOU CAN SMELL IT GETTING REAL HOT AND IT STARTS GURGELING ,ANY IDEAS WOULD BE APRECIATED
THANKS

Offline Aus78Formula

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Re: OVER HEATING
« Reply #1 on: June 20, 2020, 09:48:49 PM »
Get a second opinion on the temp gauge, they are common. And make sure thermostat is correct.

Offline b_hill_86

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Re: OVER HEATING
« Reply #2 on: June 21, 2020, 12:03:08 PM »
Timing too retarded can cause overheating too I believe.
-Brian-

1977 Trans Am 400 4 speed hardtop

Offline Stringer

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Re: OVER HEATING
« Reply #3 on: June 22, 2020, 04:41:01 PM »
Do you have a proper fan shroud?  One that is as large as the radiator and as small as the fan? The purpose of a fan shroud is to funnel the air through the whole radiator.  If you don't have a shroud that covers the entire radiator...air will go around it instead of through it.

If you do not have a proper radiator shroud THAT is your problem. Either put it back to the the original configuration or fabricate a custom shroud. 

I live in Phoenix and have a factory setup on my 79 with a 403. I routinely drive in 1100 heat and I have never had an overheating problem; either in town idling in traffic or on the freeway.

« Last Edit: June 22, 2020, 04:48:37 PM by Stringer »

Offline Aus78Formula

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Re: OVER HEATING
« Reply #4 on: June 23, 2020, 01:14:17 AM »
x2 on the shroud if missing or mismatched.