Question about Chevrolet Celebrity

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I have changed the air filter, the radiator cap the thermostat and flushed the radiator. after 10 minutes the temp light comes on and after 15 minutes it dies. i have to wait 20-30 minutes for it to cool down and it starts immediately. the temp light has been coming on for at least a year but, it has never died until recently. Have been told it could be an electronic connection, possibly in the control module, that gets hot, looses connection when hot them reconnects when cooler. How the heck can I find that!? What else can I check!?

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  • dean petersen Mar 22, 2011

    I have taken the radiator cap off and watched water flow. After I changed the thermosta the coolant is now hot and flowing. still same problem ..still temp light on, then dies after 15 minutes or so. electronics?

  • dean petersen Mar 22, 2011

    read my question

  • dean petersen Mar 22, 2011

    I have been told there is nothing (electronically) that will shut down the engine when it is hot, what is happening is a shutdown of the electronics and has to do with heat, what the hell?

  • dean petersen Mar 22, 2011

    do you have avvess t my previous symptome...Im not going to type them again...Im sick of it!\

  • dean petersen Mar 22, 2011

    I have it on good authority that there is NO system in an 89 that will shut the engine off when hot.. but the big problem is WHY is it getting hot.......there is now good water flow.

  • dean petersen Mar 22, 2011

    Im tired of these amatuer answers...Ive already heard all of this before I even tried this way...get some experts!

  • dean petersen Mar 22, 2011

    as I have said multiple times... it is an 89 celebrity 2.8 multiport. where is the control module...so I can check the connections? Have also been told there is NO electronics that will shut off the engine when hot!

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5 Answers

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  • Chevrolet Master
  • 75,807 Answers

What is the year and the model and type of engine is installed. re you saying you run the engine until it gets so hot it does? It boils over into the coolant recovery tank? Please provide this basic information if you need help.

Posted on Mar 22, 2011

  • yadayada
    yadayada Mar 23, 2011

    Your problem post is unclear and did not provide basic information about the vehicle, please understand if you want accurate answers post all the information at one time, when you reject an experts help the next expert only sees the original problem, not the added information other experts asked for, so try and stay with the one expert and work with him, do not get ahead of yourself or angry, it takes time to figure these types of problems out, the possibilities are huge for the cause of the problem. I also noted you never really answered my questions, this handicapped me and made it hard to give good sound advice.. Good luck.

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  • Chevrolet Master
  • 8,172 Answers

Hi, without knowing your model, year, and engine size, it is difficult to diagnose. Since the temp light is coming on, I would guess the computer is shutting off the engine. If the engine is not overheating, the problem may be with the calibration of the sensor. However since the sensor seems to be working, my best guess is you need to solve an overheating problem. Though you have flushed the radiator and replaced the thermostat, there are other things that could be causing the car to overheat, such as a leak or a blown head gasket. Please let me know if you have any questions, and send your model/year and engine size if you would like a more detailed diagnosis.

Posted on Mar 22, 2011

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  • Master
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Welcome to Fixya

The intake manifold gaskets might have gone bad... Intake gaskets are located in the middle of the valve cover and reach the block (V). Look with a flashlight near the block under the thermostat housing (rear) and behind the power steering pump (front) if you see coolant in these areas your intake gaskets are probably bad. Check engine oil dipstick for indications of a milkshake and high level of oil. Before attempting to replace your intake gaskets, have your head gaskets tested by a mechanic. The vehicle dies because engine is already overheating. Thank you for using Fixya!

Posted on Mar 22, 2011

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  • Chevrolet Master
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Yes, what you have been told is most likely the correct diagnostic. Since it's a connection problem that presents itself only with the engine hot, fixing it will have to be done the hard way: you will have to check every single connector for a firm fit and cleanliness of the metal contact plots - start with the contacts on the sensors from the engine.
But there is a slim chance that the engine cuts out because it overheats so much that the safety system cuts the engine down - this happens when the temperature of the engine goes beyond 140C and this happens only when there is no cooling fluid left in the head of the engine. If you have correctly refilled the circuit then bleed it one more time - there must be a vapor lock in there (make sure the internal heater is fully on while doing that).

Posted on Mar 22, 2011

  • Azrael SRL Mar 22, 2011

    Do i need to retype my answer? If you are sure that there is no vapor lock then yes, it in the electronics: one of the contacts for the sensors on the engine heats up, expands and breaks the connection - without it the ECM cuts the engine. Check them all out simply by taking out, looking at them and putting them back on firmly.

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  • Master
  • 643 Answers

You can check the water pump

take off the radiator cap

start engine

check for flow of water.....



if that doesnt work then it would have to be a temp sensor or a bad thermostat...its not uncommon to get a bad part from the parts store, check for pressure on the upper hose to see if the thermostat is opening properly.

Posted on Mar 22, 2011

  • 3 more comments 
  • Tre Elkins Mar 22, 2011

    yes thats what it sounds like a bad temp sensor

  • Tre Elkins Mar 22, 2011

    i understand, and i have read your question the only other thing to do would be to change the temp sensor, and/or the control module...once the module goes bad there is no repairing the module, just replacing it with a new one

  • Tre Elkins Mar 22, 2011

    that is incorrect....if the temp sensor is triggered, then it will relay a signal to the ecm telling it that the vehicle is overheating and as a safety precaution the ecu can shut the car down to prevent it from damaging anything.

  • Tre Elkins Mar 22, 2011

    you also never said it was an 89... in that case the cooling system is fairly simple
    and consists of

    radiator

    waterpump

    thermostat

    one of which is malfunctioning

  • Tre Elkins Mar 22, 2011

    i would still say that it is a bad temp sensor or a bad thermostat, or the radiator is bad but id you have good flow then the water pump and radiator arer functioning properly, which only leaves the sensor and the thermostat

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