1999 PONTIAC GRAND AM SE. MY CAR WAS OVERHEATING AS I WAS ON A SMALL TRIP SO I
DROVE IT ABOUT A HOUR WHILE OVERHEATING. TOOK TO THE SHOP AND HERE MY
WARRANTY WAS EXPIRED SO CAR HAS BEEN SITTING SINCE,IT STARTS UP BUT THERE IS A
LOT OF WHITE SMOKE WITH WATER THAT COMES OUT THE EXHAUST WHILE RUNNING.
ALSO THERE IS WATER IN THE OIL SO DID I BLOW MY ENGINE OR WHAT NEEDS TO BE DONE
THERE IS ALSO A SMELL OF SYRUP WHILE RUNNING.
Anytime you run an engine that is overheating, you will cause more damage than just the condition
that caused the overheating. This 3.4L 6 cylinder Engine is known for intake manifold gaskets
leaking internally/externally, and mixing with the oil as well. It does sounds like you have major
internal engine damage. Possible blown head gaskets, cracked cylinder heads, cracked engine
block, probably rod and main bearing damage due to the coolant in the oil.
1998 Pontiac Grand Am. Replaced engine with another engine with 70,000 miles on it about 1 year
ago. New Thermostat. New Water Pump. My Grand Am is overheating. It only begins to overheat if
you drive it as long as it sits it won't overheat. The leakage is coming out of the overflow hose. The
large black hose on the drivers side under the hood is hot but I can also squeeze that hose.
I was told that I should not be able to squeeze that hose it should be hard. The oil and Antifreeze is
not mixing. Do you think it could be my Radiator although it's not leaking, could it be clogged? What
else do you suggest I try?
JK:If the car is overheating and boiling over from the overflow, then you may have a bad head
gasket. Head gaskets push combustion gas into the cooling system, and cause the coolant to boil
over the overflow. Sometimes the engine is not even overheating. The pressure in the system
causes it to boil out. First try a new radiator cap. Then have the spark plugs inspected for signs if
burning coolant. Inspect the radiator for internal restriction or have it flushed out. The upper hose
being rock solid depends on the coolant temp. The higher the temp, the higher the pressure.
Are You A Mechanic?
Your Help Is Needed In Our FORUMS
Engine Overheating- Pontiac Grand Am 1999, 1998
1993 pontiac grand am 3300 V6. Replaced Heater core, radiator, reservoir, radiator cap,
thermostat, rad hoses, water pump. I have replaced everything that i could think of and it is still over
heating. I am running water in it now and it is still doing it. If you drive on flat land it will not overheat
it stays at about 175 if you pull a hill it will overheat.
I am a single mom and i have to do all of the work myself because i cannot afford a garage. So
PLEASE HELP ME!!! I will appreciate it and god bless.
Assuming that the radiator fans are coming on at the temperature they should, this may be a head
gasket problem. One condition of a failed head gasket is as you describe. Wont overheat during
normal driving, but does under a heavy load on the engine. Suggest removing spark plugs and
looking for signs of burning coolant. There is also a chemical test that can be done to detect
combustion gases in the coolant.