Mechanics

CHEVY TURCK OVER HEATING

1990 Chevrolet Silverado

Engine Cooling problem
1990 Chevy Silverado V8 Two Wheel Drive Automatic 175000 miles

Truck is overheating. Have changed the Water Pump and the Heater Core is fairly new as well. Also heat is not working. If you could help that would be great Thanks
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Cry_00
July 28, 2008.




Did you check the thermostat-could also be air in the cooling system. Not it do below

Have it block and pressure tested-do the block first to pinpoint a combustion leaking into the cooling system or a gas analyzer to sniff for hydrocarbons at the radiator fill neck.

Pressure test: do not do a pressure test if there's leakage at the headgasket this might cause coolant into the cylinders and lock it up or bend a connecting rod if cranked thereafter. The headgasket should be repaired before doing the pressure test.

If the block and pressure test passes check the following: Thermostat, Pressure test the Rad. Cap, Clogged radiator, Fan clutch, Radiator electrical fan, collaspe hoses, water pump.
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Rasmataz
Jul 28, 2008.


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