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I had the same problem with my 1999 grand am .I changed water pump, thermostat. I heard the Pontiac engines , 3.4 had overheating problems one is the intake gasket if your losing water but don't know were its going its leaking at the intake gasket and burning off or if you check the oil cap or the dip stick and theres a milky substance on them it would be your head gasket I had to change my head gasket and while I was there I changed the intake gasket too. I haven't had any problems sence I changed them hope this helps. Jack
In the middle and late 1990"s BMW used water pumps with plastic impellars. When the vehicle would overheat or age, the impellar would come loose and create a overheating condition. I would definitely recommend removing and inspecting the water pump. Just in case the pump is ok, you can reinstall it. Make sure to replace the o-ring on the pump. Its only about $3.00.good luck.
sounds like a fuel issue i would recommend replacing the fuel filter it is a cheap and easy fix after that if the problem persists then i would take it to a shop to get a free diagnosis in order to find out if it is your fuel injectors or your fuel pump. more symptoms of a bad fuel system would be extreme drop in rpm when put into drive, choking or sputtering, large amounts of smoke from the exhaust pipe, or complete shut down of motor after running.if you need any instruction on removal and installation of any part please comment back on this post thank you, and good luck.
IT IS LOOKS LIKE HEAD GASKET. WHEN THE HEAD GASKET IS BAD WATER GOES INTO THE TOP OF THE ENGINE (COMBUSTION CHAMBER) AND SHOWS WHITE WATER VAPOR AT THE EXHAUST= IT NEEDS A HEAD JOB
ANOTHER OPCION IS PUT A- BLUE DEVIL- HEAD GASKET REPAIR THE SMALL BOTTLE $36.00 (FOLLOW INSTRUCCION S IN THE BOTTLE
check your radiator cap condition if its ok then your engine must be having a cylinder head gasket problem, normally when engine overheats the cylinder head gasket gets fried-up and the water goes off to the exhaust along with the exhaust gas thats why u dont see any trace of leakage on the floor/ check your engine oil as well if oil and water mix together to conclude the theory.
Check for a restricted or plugged exhaust system, you could have a catalytic converter going bad... If you have no misfires and all ignition components seem to be in good condition then I would suspect maybe a issue with the exhaust system...
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