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Coolant Boiling Over!

This is a discussion on Coolant Boiling Over! within the General Help forums, part of the LSx Technical Help Section category; Hey all, I've been troubleshooting a problem i've had with my car since i got it and i really need ...

  1. #1
    TOPLS1
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    2000 Trans am Convertible

    Coolant Boiling Over!

    Hey all, I've been troubleshooting a problem i've had with my car since i got it and i really need some help! The coolant will boil over when im just cruising around town for a while, however only when the A/C is off. I know the fans come on with the a/c to cool the condesor but the motor isn't too hot. The hottest i've seen it might be 210-215 at the most. HELP!

  2. #2
    Member ls1speedster's Avatar
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    black
    2002 trans am

    drain the radiator...put knew in..

    there is prolly to much water in the coolant..lettin it boil at 212 or just over 212..

    mix a new blend of coolant and stick in there....50/50 or so..
    i see ur from canada so i would mix new appropraite to the temps..dont want it to freeze

  3. #3
    Master Mechanic Jims455's Avatar
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    '02 WS6

    one of your fans should operate without the AC on but when the temp hits a predetermined point. It sounds like this fan is not coming on possibly because the fan motor is bad or maybe the relay to the fan has crapped out. Try running a hot wire directly to the fan to see if it still works then go fromm there.

  4. #4
    someday joejenkinsglass's Avatar
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    98 formula

    try a new radiator cap or have yours tested

  5. #5
    TOPLS1
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    Good Suggestions guys, but i've tried all that!

  6. #6
    someday joejenkinsglass's Avatar
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    Quote Originally Posted by 00_transam_vert View Post
    Good Suggestions guys, but i've tried all that!
    let us know all you have done maybe we can narrow it down knowing all that?

  7. #7
    11 Second Club 11.34 bigboykilroy's Avatar
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    1998 Firebird Trans AM

    Do you know if the previous owner ever had the car tuned?
    are you able to unplug the wire connectors to each fan and test each fan motor to make sure they are both operational?
    Have you puilled the therostat to make sure it is the proper one for the car and that it has not been modified?

  8. #8
    TOPLS1
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    I know the previous owner didn't have a tune, Both fans do work, i've tried them myself. Come to think of it; i didn't try a new radcap, i'll grab one after work and give it a shot, the car is going into storage anyway on friday,boy is my face is gonna be red if it works.

  9. #9
    Member ls1speedster's Avatar
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    haha...

    reply after u get in on...and normal temp

  10. #10
    Member ApexVIII's Avatar
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    Quote Originally Posted by 00_transam_vert View Post
    I know the previous owner didn't have a tune, Both fans do work, i've tried them myself. Come to think of it; i didn't try a new radcap, i'll grab one after work and give it a shot, the car is going into storage anyway on friday,boy is my face is gonna be red if it works.
    yea put the cap on make sure its holding pressure
    M6, Lid, Ported and Polished Throttle Body (By Me!), LT, Custom Catted Y, Electric Cutout, PHB, LCA13.21@108 with a 2.3 60'

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