Engine Cooling problem
1995 Pontiac Grand Am 4 cyl Front Wheel Drive Automatic 17000 miles
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I HAVE BEEN OVERHEATING FOR AWHILE I CHANGED THE WATERPUMP THE THERMOSTAT THE HEATERCORE THE HOSES THE RADIATOR MY COOLANT ISNT BROWN NOTHING IS MIXED AND IM NOT SURE NOW WHAT TO DO THE ONLY THING I CAN THINK OF IS I HAVE A BLOWN INTAKE THE FAN IS ALSO NEW NEW ALTENATOR AND MY SMOKE FROM THE CAR IS NOT BLACK OR BLUE SO I DONT KNOW PLEASE HELP...

Try bleeding the cooling system don't work do the the block and pressure tests

Always bleed air from cooling system after replacing coolant. Set heater for maximum heat. Remove radiator cap. Loosen drain plug and remove drain bolt (if equipped) from engine block. Drain coolant reservoir. Fill coolant reservoir to MAX mark with 50/50 water-coolant mixture. Loosen bleed bolt and fill radiator up to base of filler neck. Close bleed bolt when coolant flows out without bubbles. Tighten bleed bolt. With radiator cap removed, start and operate engine to normal operating temperature. Add coolant if necessary and check for leaks.


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