Question about 1997 Oldsmobile Aurora

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Keeps overheating - 1997 Oldsmobile Aurora

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  • Oldsmobile Master
  • 2,359 Answers

When the car is completely cool,check the electric fan(s) for smooth rotation.

Clean/check/change the thermo sensor,contact and wire.

===

Excavate air pocket in coolant system / check for head gasket leak

This test will kill two birds with one stone.

===

MAKE SURE THE COOLANT SYSTEM and ENGINE IS COLD!

RAN THIS TEST IN A WELL VENTILATED AREA ONLY!

You will spill some coolant during this air pocket purge test.......BE KIND TO THE ENVIRONMENT and ANIMAL please clean up after the test!

===

Put the front end on a pair of ramp or park your car on a VERY STEEP HILL (radiator facing top of the hill) .

Top of the coolant reserve tank

Let it ran for 10-15 minutes.

Monitor for air pockets escaping from coolant reserve tank.

Small amount of bubbles is OK at 1-5 minute mark

After the thermostat open up (after 195 F warm up) at
5-12 minute mark or after high idle you should see less bubbles.

If you do not see any in rush of bubbles then your thermostat may be partially stuck or rusted badly inside the thermostat hosing.

Give the thermostat host few gentle taps.

If you see larger bubbles surfacing after 15 minutes then should do a hydrocarbon (HC) dye test to test for potential head gasket leak.

Let engine cold down and top off coolant reserve tank.

Start monitor for coolant lost

===

A coolant flush is require every 2 years or 24,000 miles.

I recommend the thermostat that has a relief pop-let to reduce the change of burst radiator and coolant hoses.

Make sure you get a new thermostat gasket,black RTV and fresh coolant for the job.

===
Please post more information by clicking the comment link on the top right corner.

DON'T FORGET to RATE ME if my tip is helpful to you!

Posted on Dec 05, 2009

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  • Master
  • 3,051 Answers

Hello there:
i would first see if any of the hoses are worn out and leaking including the coolant recovery tank
next check to see if the water pump is spitting out water if it is than it is in need of replacement
next you may want to check the thermostat if it is stuck closed no water will be getting thru the engine resulting in a overheating condition.
next do a complete radiator flush cause if it is clogged the water will not circulate properly and will result in the car overheating ok
also check the belts that go to the water pump to see if they are loose or worn... if they are loose tighten them so that there is about 1/2 to 3/4 inch of play by pressing the middle of the belt.
ok this should help you out is most situations. ok?
best regards michael

Posted on Sep 30, 2009

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  • Oldsmobile Master
  • 1,564 Answers

You may have to have your themostat replaced. Checking this device can be dangerous therefore this procedure should be done by a professional. Also you may want to check for coolant leaks around the vicinity of the water pump and the radiator and heater hoses. Thanks, Dana

Posted on Sep 30, 2009

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