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.

Answer:
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?

Answer:
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.
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.

Answer:
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.
3.4L GM V6 head gasket blown.

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