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09-22-2001, 02:20 PM | #1 |
Registered User
Join Date: Aug 2001
Location: Glasgow (Charleston) WV
Posts: 17
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350 runs hot...need help
I just put in a new 4-core radiator and a higher flow thermostat in my truck. Idleing it hovers just below 230. If I punch the gas the temp drops. If I hold it at a constant RPM it heats up again. I havent driven it anywhere while it is hot like this. I have even put a furnace blower infront of the grill to blow more air. The shrould is on and the fan is moving a good amount of air. I have been running without a thermostat because I just figured I needed a bigger radiator. I have a year old Remanufactured water pump and new hoses. The motor is a '76 350, .060 over, Vortec heads, Elelbrock Performer Intake, and Comp Cams 252 High Energy camshaft.
The engine has done this since I put it in in early July, but I just took the thermostat out. I had a leaking head gasket problem earlier, but I seem to have gotten that fixed. Other than the temp, the engine is working good. A mechanic friend said to check and make sure I dont have the Intake gaskets on backwards. Thanks for any help, Mike |
09-22-2001, 08:39 PM | #2 |
its all about the +6 inches
Join Date: Jan 2001
Location: Hilliard Ohio
Posts: 2,690
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Removing the stat will only make it worse. Try installing a 160 degree stat on it.
Normally idleing with high temp means lack of air, and high speed over heating would be lack of coolant flow. Do you have an A/C truck? If so, are your finns bent? Are they blocked? Did you look inbetween the condensor and the rad? Is your belt slipping? Do you have a worn fan clutch? |
09-23-2001, 09:30 AM | #3 |
Registered User
Join Date: Sep 2001
Location: Canada
Posts: 15
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The more you bore your cylinder walls on your block , the more heat it will create. Boring a 350 .60 over might be giving you all your problems .
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