Engine Cooling problem
1990 Pontiac Firebird V8 Two Wheel Drive Automatic 186000 miles
i just got my car out of the shop and had the cylinder heads exchanged, and a brand new intake manifold, and a new water pump with raidator and thremostat. what else could be causing my car to over heat
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: , Pressure test the Rad. Cap, Clogged radiator, air lock in the cooling system, Fan clutch, Radiator electrical fan, collaspe hoses, water pump