Question about 2002 Oldsmobile Alero

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The car keeps overheatnig. It was good for a minute after putting some coolant in it, but when you drive it or just turn it on sitting in the driveway after about 2 minutes the therometer is all the way up and the the car starts to overheat.

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  • Anonymous Apr 22, 2009

    i have a 1991 mercury sable station wagon, when i start the car it is fine then appx 25 mins later the temp starts to rise and he temp goes up and down I have no clue what would cause this. the thermostat is good there is anti freeze in the rad. and the fan is working....

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If its the thermostat your lucky easy fix just replace it but wait until the engine is cold the bolts are a nightmare to get to you have to take off air hose and disconnect a couple coolant hoses move them aside to get to the thermostat housing on the side of the engine tricky getting to that bolt.

if its the head gasket flush the radiator with flushing agent
first drain the coolant from bottom radiator hose replace with flushing agent run car idle about 10 minutes then
remove the thermostat replace the thermostat housing then fill the coolant back up leave room for blue devil head gasket sealant about $65.00 follow the directions to the tea run for 50 minutes if it doesn't work that baby needs to get in the shop
hope this helps don't forget to rate if I was helpful.
good luck

Posted on Jul 30, 2008

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Ok here is a few thingsto look at
check under the oil cap see if its creamy if it is blown head gasket

run car till over heat or get hot stick your hand in the middle of the radiator if it aint that hot no water is going though the motor to cool it so the thermostat is blocked

Posted on Jul 29, 2008

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1. When setting the temperature to MAX, blower level to FULL and outside air Vent CLOSED, no hot air comes out after 2-5 minutes?
If YES, when did you last flushed your radiator and is it full?
2. if more than 5 years ago, flush radiator system, instructions are usually in Owners manual. Use a bottle of Radiator cleaner, run egine hot for about 10-15 minutes, carefully open petcock in bottom of radiator to flush out radiator, WARNING, careful as flushed coolant would be boiling hot. As sson petcock is open and water start to flow out, carefully open radiator cap to enhance flushing flow. Use garden hose to fill radiator while flushing until water coming out from petcock is cold and clear.
Once clear, start engine, turn heter full and blower full blast and keep hose in radiator flowing full, leave petcock open until clear water flows out again. Once clear waters comes out, turn off engine,turn off garden hose and let water drain empty radiator. Once it stops flowing out, close petcock snug and put radiator cap on, pull off radiator coolant catch bottle, clean bottle for any debris and dirt. Drain any water, leave bottle empty and put it back onto its place.
3. Fill radiator with 1 gallon (4L) of concentrated coolant, top up radiator until full, fill catch bottle with concentrated coolant, start engine and keep it overflowing until no bubbles comes out and the radiator is fully hot. Once it is flowing good, close and connect everything. Drive with it and keep catch bottle filled as necessarry.
Good luck. Give as vote and good comment if this advise solve youor problem. Thank you.

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