Mechanics

CHEVY OVERHEATING ISSUE

2001 Chevrolet Malibu

Engine Cooling problem
2001 Chevy Malibu 6 cyl Front Wheel Drive Automatic

I have an '01 malibu, I've had the intake manifold gasket, thermostat and the temp. Sensor replaced but it is still getting hot and seems to be losing fluid without any signs of leaking (stains on driveway.) It has been about 3 months since a new thermostat was installed and it went up to 260+ with the red warning light coming on, I pulled the hood latch button from inside the car and continued home (about 3 blocks, ) by the time I pulled into my driveway the temp. Started dropping almost as fast as it went up. I let it sit for a couple days and attempted to drive it again (hoping it was a fluke, ) and it began to get hot again. What do I look into now? Thank you for your time.
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Lamm90
August 12, 2008.



Pressure check the cooling system. Also did you make sure the you completely bleed the cooling system of all the air

Tiny
Rhall77
Aug 12, 2008.
The work was completed at a shop by certified mechanics, I can't say with 100% certainty, but I would imagine they did. The parts were replaced about 6months ago, and a second 'stat was installed about 2-3 months ago. Now it's getting hot again, I'm at a loss and the shops are crazy expensive ($275 just to replace the last 'stat.)

Tiny
Lamm90
Aug 12, 2008.
With the temp going up and down it sounds like there is air in the system from a leak or something. Go to auto zone or somewhere like that and see if they rent pressure testers for the cooling system, pressure up the system to 14-16 psi and watch for either the gauge to drop aand watch for a leak.

Tiny
Rhall77
Aug 13, 2008.
Before any damage is done, you might want to check the oil level and see if it is too high and/or has a chocolate milk looking oil on it. Also pull the plug where you install oil in the engine doing an oil change. Look for the same chocolate milk looking substance on the cap and look down in the valve cover where the rocker arms are for the same substance. Any signs of this indicates the coolant is leaking internally in the engine, probably due to the intake leaking internally (even though it was recently done).

Tiny
Jetsa
Aug 13, 2008.