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  • Coolant question

    Asking this for my Dad. Last year he bought a '70 Nova SS396. When we got the car, it had dexcool in it. We have since flushed it and it looked fine but some of his friends have been telling him he shouldn't have dexcool in it. Personally, I think its fine. The jury says ... ?
    -Joel
    1995 Z28 M6 - AI226/234 - autocross ricer
    1984 Scottsdale K10 - 305/4bbl/4spd


    WTB List:Midwest Chasis DS Loop

  • #2
    I have ran dexcool in my firebird for 3.5 years. I have heard all kinds of pro and con's but its been fine for me.
    EDIT: It was in there when I bought the car. Have flush and refilled with dexcool.
    sigpic
    1998 Trans Am Convertible A4 - WS6 hood, WS6 air lid, WS6 rims, drilled/slotted rotors.

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    • #3
      I don't have a problem with DexCool

      1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
      1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
      1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

      2006 Saab 9-7x 5.3i Daily Driver

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      • #4
        I've heard that on older engines the DexCool doesn't like certain gasket material and can cause problems. If that's the case, Peak green antifreeze is the better choice. I run DexCool in my Firebird with no problems.
        sigpic

        355 LT1 M6. 232/240 LE cam. 21* Trick Flow heads. Fully ported intake. 58mm TPIS tb. 42# SVO Injectors. LS7 Lifters. Moser 9" TrueTrac w/ 4.22 gears. True Duals. UMI Suspension. LS1 brake swap. Dr. Phil tuned 400ish rwhp. Money Pit.

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        • #5
          What do his friends mean when they say "the car shouldn't have dexcool"? Gm started using dexcool in 1995, prior to this all vehicle has green coolant.

          I have dexcool in my chevelle and every vehicle we assemble in which it has a new cooling system is filled with long life coolant.

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          • #6
            Originally posted by bri2203 View Post
            What do his friends mean when they say "the car shouldn't have dexcool"? Gm started using dexcool in 1995, prior to this all vehicle has green coolant.

            I have dexcool in my chevelle and every vehicle we assemble in which it has a new cooling system is filled with long life coolant.
            They mean it will cause problems.

            This engine was rebuilt less than 10 years ago by the previous owner. He was a performance junky with the wallet to pay for it, and everything was done right. It is hydraulic roller converted and runs on 93 octane. Seems doubtful to me he would screw up a simple detail like coolant. We really havent found a single thing on this car that was half-assed or done wrong yet. Just things that were nearing the need for routine maintenance.
            Last edited by JoeliusZ28; September 18th, 2012, 09:15 PM.
            -Joel
            1995 Z28 M6 - AI226/234 - autocross ricer
            1984 Scottsdale K10 - 305/4bbl/4spd


            WTB List:Midwest Chasis DS Loop

            Comment


            • #7
              dex cool eats plastic, also deteriorates rubber. I've seen a few leaky LS radiators from that junk. I've always ran the green stuff, in my truck I have the CAT ELC "extended life coolant" my camaro just has water in it
              1998 Camaro SS Bullseye Turbo
              2002 F-250 7.3 Leveled on 20s with 35's
              2006 Yamaha R6 50th Anniversary
              http://www.mifbody.com/vbulletin/sho...-Update/page11

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              • #8
                should be fine, if it was built as meticulously as you noted then i see no issue with running it. just dont mix dexcool with regular stuff.
                91 Trans am, 305, Lt1 cam, 24lb injectors, headers, SLP LM2, SW chassis, massive panhard, lowered, modded TPI, Tuned, 4.10s, Lincoln locked
                85 Z28 406/th400?/3.42 4th gen disc rear/4th gen dash
                00 Tahoe Z71........Stock
                97 K1500 lt4 cam, 1.6s, MPFI, Solid axled, IROKs,------winter beater

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                • #9
                  DexCool doesn't like some older gaskets, yes, it's PH related form what I hear.

                  DexCool is fine when properly maintained. I do run the standard green antifreeze after every flush though Just what I have a stock pile of

                  1998 Camaro Z28 - Bright Red, 6.0 TR224, 4l60e, 3.42 Eaton TrueTrac
                  1989 Camaro IROC-Z Convertible - 355 big tube TPI, WC T5, 3.42 Zexel Torsen, CTS-V/C4 brakes
                  1955 Bel Air 2 Door Post - 357 TPI, Muncie M20, 4 wheel disc

                  2006 Saab 9-7x 5.3i Daily Driver

                  Comment


                  • #10
                    Anyone that thinks leaving that shit in for its "100K mile service life" is a good idea has some screws loose.


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                    • #11
                      Originally posted by c0ncEpT View Post
                      Anyone that thinks leaving that shit in for its "100K mile service life" is a good idea has some screws loose.
                      The radiator shop I deal with says it is more of a 4 year 80,000 mile coolant, which reminds me I need to flush the coolant in the tuner.

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                      • #12
                        So, the answer is no one really knows
                        -Joel
                        1995 Z28 M6 - AI226/234 - autocross ricer
                        1984 Scottsdale K10 - 305/4bbl/4spd


                        WTB List:Midwest Chasis DS Loop

                        Comment


                        • #13
                          all dexcool is, would be a longer life coolant right?
                          so whats wrong with it, use dexcool and get longer coolant life or green and shorter..
                          1997 Trans Am
                          T56 swap. LS1 Cosmetics

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                          • #14
                            if i may voice my opinion, coolant is coolant, long life stuff is just advertisement. yes it may last longer but i wouldnt want to really find out how much longer and neglect my cooling system. use dexcool or regular ethylene glycol just dont make sure to mix them, and keep them maintained and youll be fine either way.
                            91 Trans am, 305, Lt1 cam, 24lb injectors, headers, SLP LM2, SW chassis, massive panhard, lowered, modded TPI, Tuned, 4.10s, Lincoln locked
                            85 Z28 406/th400?/3.42 4th gen disc rear/4th gen dash
                            00 Tahoe Z71........Stock
                            97 K1500 lt4 cam, 1.6s, MPFI, Solid axled, IROKs,------winter beater

                            Comment


                            • #15
                              Look up a product called Final Charge. /end coolant problems
                              2015 Silverado

                              Originally posted by JoeliusZ28
                              If you need 6 and half grand to break your tires loose you shouldnt be attempting a holeshot.

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