overheating questions!!!

RacerX · 07-12-2001, 09:59 PM

I've been having trouble with my cooling system lately, I changed the thermostat, all the hoses, I flushed the rad, and it still overheats, and I'm fresh out of Ideas, there are no leaks that I can tell, any help would be appreciated.

MDM · 07-12-2001, 10:38 PM

I will imagine that your water pump is functioning properly and has good bearings, your system is filled with a max of 50% antifreeze, and you are experiencing actual overheating rather than just on the gauge, which could have a bad sender or other problem. Starting with the basics: Have you done any power creating mods between when when it was OK to when it began overheating? If so, the additional power will create additional heat and you may need a larger aluminum radiator if you don;t have one already. If you have a mechanical fan, you may want to replace the clutch if it has some miles on it. It may still appear to function, but may be turning too slowly to cool the motor at speed. Have you tried pressure testing or swapping out the radiator cap? What type of thermo did you use? The thermo can make all the difference with a cooling system. I have had good luck with the 180 deg. Edelbrock HP balanced thermos. I would not trust anything from a parts store, as the opening discrepancies you will find amongst similarly rated thermos can be huge. Also, the Edelbrock piece has a larger diameter opening area for added flow. Hope these ideas help lead to a solution.

AtaxicStanger · 07-12-2001, 10:44 PM

What year car do you have?

The 94-95's have an ECT sensor that goes bad on a regular basis.

Al

------------------
95 GT, GT40 Aluminum Heads, Intake u/l, 9# Powerdyne SC, 65 mm FMS TB, 70 mm FMS MAS, 30 lb injectors, E303 cam, Hooker Super Comp equal shorty headers, H pipe, Flows, Nitto DR, MSD BTM, Adjustable FP reg, 255 fuel pump, Autometer gauge pod with Electric FP guage and Boost guage, a few other odds and ends

stanger8172 · 07-12-2001, 11:17 PM

RacerX,

My bro went through the same situation you have. He even changed the lower intake gasket. Turned out it was one of his catalytic converters. He just had to clean one out. Hope this helps

07-12-2001, 09:59 PM	#1
RacerX RacerX Join Date: Nov 1998 Location: Calgary AB, Canada Posts: 91	overheating questions!!! I've been having trouble with my cooling system lately, I changed the thermostat, all the hoses, I flushed the rad, and it still overheats, and I'm fresh out of Ideas, there are no leaks that I can tell, any help would be appreciated.

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07-12-2001, 10:38 PM	#2
MDM Registered Member Join Date: Feb 2000 Location: Flemington, NJ USA Posts: 166	I will imagine that your water pump is functioning properly and has good bearings, your system is filled with a max of 50% antifreeze, and you are experiencing actual overheating rather than just on the gauge, which could have a bad sender or other problem. Starting with the basics: Have you done any power creating mods between when when it was OK to when it began overheating? If so, the additional power will create additional heat and you may need a larger aluminum radiator if you don;t have one already. If you have a mechanical fan, you may want to replace the clutch if it has some miles on it. It may still appear to function, but may be turning too slowly to cool the motor at speed. Have you tried pressure testing or swapping out the radiator cap? What type of thermo did you use? The thermo can make all the difference with a cooling system. I have had good luck with the 180 deg. Edelbrock HP balanced thermos. I would not trust anything from a parts store, as the opening discrepancies you will find amongst similarly rated thermos can be huge. Also, the Edelbrock piece has a larger diameter opening area for added flow. Hope these ideas help lead to a solution.

07-12-2001, 10:44 PM	#3
AtaxicStanger Registered Member Join Date: Jan 2000 Location: Waukesha, WI Posts: 59	What year car do you have? The 94-95's have an ECT sensor that goes bad on a regular basis. Al ------------------ 95 GT, GT40 Aluminum Heads, Intake u/l, 9# Powerdyne SC, 65 mm FMS TB, 70 mm FMS MAS, 30 lb injectors, E303 cam, Hooker Super Comp equal shorty headers, H pipe, Flows, Nitto DR, MSD BTM, Adjustable FP reg, 255 fuel pump, Autometer gauge pod with Electric FP guage and Boost guage, a few other odds and ends

07-12-2001, 11:17 PM	#4
stanger8172 Registered Member Join Date: Nov 2000 Location: Milwaukee,Wisconsin Posts: 380	RacerX, My bro went through the same situation you have. He even changed the lower intake gasket. Turned out it was one of his catalytic converters. He just had to clean one out. Hope this helps