Question about 2000 Oldsmobile Alero

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The engine consistently gets hot and overflows though the fans are working fine. There are no visible leaks anywhere. Also, the transmission has been lulling at times since this began. I am wondering if the thermostat could be causing this problem or am I looking at something much more serious.

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A blocked radiator will cause the symptoms you are describing. A completely failed water pump would also cause these symptoms, but you generally would have at least a small leak by the water pump and the noise would be distracting from the failing pump. So try to flush the radiator and replace if you are unable to get the liquid to circulate normally.

Posted on Sep 28, 2010

  • rickillam Sep 28, 2010

    Water pump is fine. I am told it could be a stuck, or bad, thermostat. But, neither explains the transmission suddenly acting like its slipping at times.

  • Tony Lamk Jan 06, 2011

    The transmission is cooled by the radiator as well.. If the radiator is plugs or the fluid can circulate then it will cause the fluid in the transmission to also overheat. Check the transmission fluid after the car is warm and still running and see if it has started turning a dark color. If it is then bring it in to have it serviced and try adding some Lucas No Slip Transmission Fix. It's a very good prodect to use especially when your having these kind of issues.

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- a possible leak to a cylinder, and thence down the tailpipe. Normally this would cause overheating, but perhaps the car is handling what heat there is. There is a simple test for combustion gases in the coolant, so you could get that done

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