Continual coolant leak.

Discussion in 'Engine & Drivetrain' started by Trickster29, May 18, 2017.

  1. Trickster29

    Trickster29 TYF Newbie

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    Brenden
    With the new thermostat its normally 190F. But I've never seen it go passed 205F. My driveway kinda has that slope on it by default. But it's nice to know that's actually a benefit. Thank you :)

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  2. Trickster29

    Trickster29 TYF Newbie

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    If I have any extra cardboard in the garage I'll move it there. Thanks for the advice.

    Also thanks for the positive thoughts. :)

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  3. Dan Devine

    Dan Devine TYF Newbie

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    We have a 2001 Yukon XL that had a similar problem as you described. I replaced the water pump, could never find any leaks, but it was always down a little bit. Then it got worse and needed more coolant each week. I finally pulled the valve covers off and found that the heads had hairline cracks (common problem on these heads). Under the valve covers looked like peanut butter mashed in there. This dexcool doesn't seem to behave like the old coolant, it turns into a thick goo instead of going into the oil pan. I found welded heads and replaced them myself, 3 years later still good. I hope this isn't your issue, easy to pull the valve cover and check. It was a lot of work, but all doable, took me 2 days. $700 for everything I needed, dealer wanted $4K.
    BTW, Autozone will loan you a pressure tester.
     

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