Question about 1997 Oldsmobile Aurora

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Over heating after replacing the thermostat, the water pump, and the pressure cap, the car is still over heating into the red zone

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Have you bled the system at all? I personally do not seen any model of your car as I come from Cyprus and we do not have anything like. I am advising you based on other cars,where I am repairing. I personally use this procedure to avoid the long time bleeding the system. I before fitting the thermostat fill up the engine block with coolant from thermostat's place till filled up to the edge.Then i fit the thermostat and continue the filling from the expansion tank or radiator up to the maximum level. I leave off the radiator cap start the engine and let the it run on idle till the bubbles stop ( air ) ,put the radiator cap back on and let it continue idle till the fan comes on. As soon as it cuts out I switch off the engine ,let it few minutes for the pressure to drop and check the coolant level,if is okay I just put the radiator cap back on or if it is low to top up.

Posted on Nov 03, 2012


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Posted on Jan 02, 2017


SOURCE: overheating

Not too sure I ended up taking to the shop. They are going to change the thermostat for the second time and if that doesn't work they are thinking blown head gaskets.

Posted on Jul 20, 2008

  • 193 Answers

SOURCE: i have a 2000 oldsmobil

I would say you have an air lock in the cooling system and it needs to be bled. Your water pump is cavitating, meaning an air bubble developes around the water pump impellars, an can't circulate the water.

Posted on Nov 19, 2008

  • 1068 Answers

SOURCE: My 2001 Oldsmobile Silhoutte is indicating

it may have an air pocket and keeping the theremostat from opening or the electric fans are not turning on.

Posted on Dec 12, 2009

  • 1498 Answers


Hi there camcam,

Ok, first off the cooling system has to be full and circulating for the heater to work. When we get the rest of it solved, the heater will take care of itself.

Now the overheat problem. We need to determine if the engine is overheating because of lack of coolant or the lack of coolant is because of the overheating (Boiling off).

If you have to put in any significant amount of water on a regular basis, it has to be going somewhere. If there is a pool of coolant forming under the car, there's a leak. You need to locate it and act according to where you find it.

  • Radiator - weld or replace
  • Hoses - replace
  • Water pump - replace (check fan if attached, for balance)
The thermostat is a temperature triggered valve that periodically routes coolant circulation through the radiator. This allows hot water from the engine to be exchanged with cool water from the radiator.

A malfunctioning thermostat doesn't allow the heat exchange process, the engine overheats, coolant turns to steam....

Although rarer, the same result occurs if the water pump does not circulate coolant. When a water pump fails, it's usually leaking through a shaft seal.

So, if you don't find a leak, the thermostat is the first (and least expensive) thing to address.

I hope you find this to be instrumental in solving your problem.

Best regards

Posted on Apr 06, 2010

  • 147 Answers

SOURCE: Have an 2003 Olds Alero 2.2L, overheating.

I can't give you any specifics on how to change your water pump, but I can answer your questions about the thermostat. Yes, the heat will work withou a thermostat. And yes, a car will overheat without one, especially in the summer months. The purpose of a thermostat is to allow cooler water to flow into your block, but also to allow the water adequate time to be cooled in the radiator. Without the thermostat, water is continuously cycling through your coolant system, getting hotter and hotter. Often I see people with malfunctioning thermostats jsut remove them, sometimes on the side of the road, just to get where they're going.

Posted on May 02, 2011

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