2001 Oldsmobile Silhouette Logo
Posted on Dec 12, 2009
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My 2001 Oldsmobile Silhoutte is indicating overheating. Mechanic replaced water pump and thermostat and changed the radiator fluid. Need still jumps into the red zone. Mechanic tested the head gaskets and they are fine. What to check next?

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  • 5 more comments 
  • heatherzacny Dec 12, 2009

    Fans are coming on. How do we check for an air pocket. Would it work itself out? Afraid to drive it and damage the engine.

  • heatherzacny Dec 12, 2009

    It's also running on one less cylinder. Although he checked the spark plugs and found nothing wrong. Thinking it may be an injector.

    Could this be related?

  • heatherzacny Dec 12, 2009

    Double checked with husband, mechanic flushed the radiator and the hoses. Even though the dash indicator says it is running hot, the temperature of the fluid is in the normal range.

  • heatherzacny Dec 12, 2009

    Is the sensor different than the thermostat?

  • heatherzacny Dec 12, 2009

    Talked to husband again. Mechanic replaced the sensor AND the thermostat.

  • heatherzacny Dec 12, 2009

    He showed DH the used parts....

  • heatherzacny Dec 12, 2009

    He showed DH the used parts....

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1 Answer

michael schultz

michael schultz

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  • Master 1,068 Answers
  • Posted on Dec 12, 2009
michael schultz
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It may have an air pocket and keeping the theremostat from opening or the electric fans are not turning on.

  • 1 more comment 
  • michael schultz
    michael schultz Dec 12, 2009

    yes running on a misfire may cause extra heat. but to check for air you will need to see if the thermostat is opening. feel the bottom hose of the radiator to see if it is as hot as the top hose when the temp gauge is above the normal position and if the bottom hose is colder the thermostat is not opening and if it is hot as the top the n it is.

  • michael schultz
    michael schultz Dec 12, 2009

    oh okay. then you temp sensor is bad and needs to be replaced. good luck

  • michael schultz
    michael schultz Dec 12, 2009

    okay. ask him if the mechanic put vehicle on the computer scanner and was able to read temp in degrees while monitoring the gauge on the dash board? was the computer reading right while the gauge was off? if so there may be an issue with the gauge or data lines from vehicle computer (ecm) and gauge cluster. or gauge itself (cluster) also ask how does the mechanic know the car was at the correct temp? did he use a inferred sensor gun or thermometer?

    it sounds like if the sensor was replaced and it is still reading wrong then i need to know what the other stuff is reading before i can advise further.


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