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What coolant do you use?

This is a discussion on What coolant do you use? within the General Help forums, part of the LSx Technical Help Section category; I know GM says to use DexCool but I wanted to see what you guys use and if you have ...

  1. #1
    Senior Member TransAm11973's Avatar
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    What coolant do you use?

    I know GM says to use DexCool but I wanted to see what you guys use and if you have had any issues. I noticed a bit of the ole brown sludge in my overflow resivoir, never had it before. Think its time for a flush, wonder if the cold has anything to do with it

  2. #2
    Senior Member bigrondownhiller's Avatar
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    Even if it is dexcool I would flush it. It probably hasn't been done before. I would change the thermostat too.

  3. #3
    Member 346ci's Avatar
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    I use dex cool and would recommend flushing it out if you haven't already, t-stat is a good idea too.......I learned the hard way

  4. #4
    Just a souped up sunfire. Ryans99LS1's Avatar
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    I run regular coolant, no dex.. all it takes to switch is a complete drain of the system which means getting it out of the block before you put the regular stuff in. Car runs great.

  5. #5
    Veteran 0rion's Avatar
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    06 duramax

    if you decide to run regular glycol make sure you get all of the dexcool out of the system. If not it will sludge up and eventually harden. I run global in mine.

  6. #6
    Single Malt rbob93's Avatar
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    Sebring Silver
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    Dexcool since new.
    Flush & renew every spring.
    145,000 miles strong.

  7. #7
    Impounded
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    79 T/A -91 Firebird
    1998 Trans Am -Oynx Black

    DexCool.

    155k

  8. #8
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    PEWTER
    2001 TRANS AM WS6

    DEX just dont let the change interval go for 5 years like the bottle says

  9. #9
    Retired NOT tired SteveC's Avatar
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    2001 Z28 (Sara)

    I use a mixture of DexCool and distilled water and a bottle of RP "Purple Ice", I change the coolant every 15K (garage queen), and I never have had any issues.

    SteveC
    Last edited by SteveC; 12-06-2008 at 04:20 AM.

  10. #10
    Blown, Stroked, & Sprayed

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  11. #11
    formally 01 T/A 0verkill's Avatar
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    Quote Originally Posted by Ed Blown Vert View Post
    Distilled water and water wetter
    i run the same in with the dex. dont mix the dex like sead befor or you will have big issues down the line.

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