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Dex-Cool

Discussion in 'Maintenance & Fuels' started by rtquig, May 17, 2008.

  1. rtquig

    rtquig New Member

    123
    0
    May 13, 2008
    Forked River, NJ
    Have many of you switched out the Dex-cool and put back the regular green anti-freeze? So far mine looks good, but at a local shop the owner gave me a trade magazine that shows the problems GM has been having. I would like to swap it out myself, but it is a large volume of coolant to deal with and I don't want to let it go all over the ground.
     
  2. PickupMan

    PickupMan from DP adamguy2006

    14
    0
    May 17, 2008
    Nashville MI, Lima OH
    I haven't yet but after warrentee is up i will. ask autozone they may take it.
     
  3. Sparky8370

    Sparky8370 Do chickens have large talons

    1,703
    0
    May 3, 2008
    New Hampshire
    I switched mine when I changed my head gaskets. When I had to add coolant before that, I'd add peak longlife that mixes with any color so it was pretty diluted by the time I switched it out. I also used peak longlife after so even if there was a little still in there it should mix fine.
     
  4. DunesRunner08

    DunesRunner08 Banned

    1,417
    0
    May 7, 2008
    Phoenix, AZ
    I use the royal purple Ice in all my vehicles...well the ford has the redline water wetter but they both do the same thing
     
  5. WilliamBos

    WilliamBos Serial Post Whore in the making...

    Is the Royal Purple warranty approved?? Ethylene or Propylene??
     
  6. Heartbeat Hauler

    Heartbeat Hauler A(ACLU) Agent Yoda

    2,079
    0
    May 4, 2008
    Morgantown, WV
    I think I will continue to use the Dex-Cool, but I change it out every couple of years and I replace the rad cap.

    I think the problem with dex-cool is the claim it will last 5 years or 50,000 miles and people expect it to last that long.....it can wreak some havoc over that may years.

    JP
     
  7. WilliamBos

    WilliamBos Serial Post Whore in the making...

    I agree 100%!! Sticking with Dex too, and gonna change sooner than recommended. I too think people are changing late, or more than likely not at all, and then blame Dex when something goes wrong.

     
  8. sparky1562

    sparky1562 Just a hack

    17
    0
    May 11, 2008
    Middle TN
    rtquig mentioned a trade article on the problems. What exactly is the issue with DEXCOOL? I have read about this before, but with no specifics on what the problem is.

    What is supposed to be so good about DEXCOOL in the first place? Is longer service life it?
    :confused:
     
  9. sparky1562

    sparky1562 Just a hack

    17
    0
    May 11, 2008
    Middle TN
    Last edited: May 28, 2008
  10. rtquig

    rtquig New Member

    123
    0
    May 13, 2008
    Forked River, NJ
  11. saratoga

    saratoga Unpaid Help Staff Member Moderator

    4,535
    56
    May 3, 2008
    Lithia, FL
    I'm not going to mess with it since I've never had any problems with any of the GM trucks that I've owned with Dex. I've owned a 97 S-10 with the 4.3; bought it new in 96 and sold it in 01 with the original coolant. No issues with the coolant but it did get a new radiator cap along the way. The 97 dually had the 7.4; bought that used in 01 with 22k on it. No coolant issues, just the stupid heater hose outlet that rusted because a steel fitting was screwed into the alumnium intake. The replacement fitting was aluminum. Bought an 01 2500HD 6.0 in 03 with 32k on it. No coolant related issues. Got the current truck in 05, no issues with it so far.

    One thing I will say is that anytime I've added coolant to the tank it has been a 50/50 mix of distilled h20 and dex. Don't use tap water because of the high mineral content which does seem to start scaling when used with dex more so than the green coolants.
     
  12. rtquig

    rtquig New Member

    123
    0
    May 13, 2008
    Forked River, NJ
    The shop that installed my "Merchant" pump rub fix told me I should get the Dex out ASAP, he also has a radiator shop and say's that the stuff is killing gaskets, and radiators.
     
  13. Sparky8370

    Sparky8370 Do chickens have large talons

    1,703
    0
    May 3, 2008
    New Hampshire
    My seals in and around my t-stats were very deteriorated.
     
  14. sparky1562

    sparky1562 Just a hack

    17
    0
    May 11, 2008
    Middle TN
    Jay, how many miles when you pulled your heads and found the deterioration?
     
  15. WilliamBos

    WilliamBos Serial Post Whore in the making...

    I wonder how many miles/km's are on these vehicles when they come in to these rad shops?? I will not be switching back to the green stuff. Propylene glycol has been used in building heating systems for years, just test the glycol, change as needed, and their should not be a problem.

    JMHO.
     
  16. SfcJones

    SfcJones A(ACLU) SGT. SLAUGHTER

    3,504
    12
    May 3, 2008
    South Ga.
    I wonder how much of this is false information, I have yet to have a problem with the red stuff, I have had several trucks with the red stuff and no issues. My current Dmax has over 224k miles and I changed the fluid a few months ago when the water pump went out. The dex cool didn't make the pump fail...the miles did

    On edit..I still have the original hoses and everything still onthe truck and no leaks/no issues
     
  17. truckie481

    truckie481 Dagum

    682
    0
    May 4, 2008
    Cleveland, NY
    I'm at 56,000 with dexcool and all looks well, I thought it was good for 100,000 before changing?
     
  18. big block 88

    big block 88 Big Block 88

    852
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    May 26, 2008
    Kansas Topeka
    Dexcool eats away at your gasket material and breaks it down, 350 Vortech are just about famous for it, the intake gasket just go away then the oil starts mixing in the antifreeze we all know how good that is, my dad ran a bad head gasket for about 15,000 miles before he changed it out, hard to find the time. Mobil1 full synthetic 5W30 seems to hold up pretty good though. I dump the Dexcool as soon as I take the truck into my hands I would change it at the lot if they would let me stuff is junk.
     
  19. Sparky8370

    Sparky8370 Do chickens have large talons

    1,703
    0
    May 3, 2008
    New Hampshire
    I just now saw this. If I remember right, it was right around 104,000 miles. I had the water pump replaced because it was leaking out the weep hole probably around 96,000 miles.
     
  20. WilliamBos

    WilliamBos Serial Post Whore in the making...

    One of the biggest reasons why I will NEVER step back to the older engines. The 5.3L will never have that problem. No coolant passes thru the intake.

    Love Dex, won't go back to the green crap. Follow the recomended maintenance, so far no problems.

    JMHO.
     

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