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engine temperture

This is a discussion on engine temperture within the Camaro / SS forums, part of the Vehicle Specific category; I have camaro ss 99. any time i turn the a/c on the coolant temperture starts to increase and when ...

  1. #1
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    red
    1999

    engine temperture

    I have camaro ss 99. any time i turn the a/c on the coolant temperture starts to increase and when i turn it off the temperture goes to normal.
    i have replaced the fans, the water pump, the radiator and the thermostat sensor and nothing happens.
    the same thing happened with the old engine, help me please....

  2. #2
    Member first01SS's Avatar
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    Pewter
    2001 Camaro Z28, Bolt-Ons

    Thumbs up Fan Relays

    When you turn the A/C on, take a look under the car and see if both fans are functional. I had this problem myself, and come to find out only one fan was running. When the car is at normal operating temp, both fans should be running at low speed. when the temp exceeds normal threshold, both fans should operate at high speed. If only one fan is running, check the relays in the fuse panel under the hood. The unmarked relay is the one that signals both fans to run at high speed; the other two (closest to the left, if you're looking at it from the front of the car) control each individual fan. These relays are cheap, and a lot easier to replace than fan motors. I hope this helps....

  3. #3
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    red
    1999

    Thanks man

    i didn't think about it
    i will try it and be in contact

  4. #4
    Senior Member camarojunky74's Avatar
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    white, white and pewter
    Rip99SSA4,74Z28M4,02SSM6

    after you check your fans for operation try disconnecting the coolant hose that connects to the tb from the cylinder head let it run till you get a steady stream of coolant coming out, it sounds like you got some air pocket stuck in their, good luck.

  5. #5
    Member first01SS's Avatar
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    ...or use the coolant bleeder valve on the heater core bypass rail..

  6. #6
    Impounded
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    79 T/A -91 Firebird
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    Quote Originally Posted by first01SS View Post
    ...or use the coolant bleeder valve on the heater core bypass rail..
    id always wanted to know where this was located

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