Thread: Bleeding coolant in LS4

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  1. #1 Bleeding coolant in LS4 
    GrandPrix Junkie SDGTP99's Avatar
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    Soo I replaced the thermostat in the GXP today and I need to bleed the air bubbles out. Is that something that can be done or do I have to wait for the bubbles to work themselves out through the overflow tank?
    OverKilled, HAI, Ported Throttle body, Ported intake, ZZP DP, Magnaflow, BMR ta's, GMPP STB's, CCS springs, tinted tailights, roof rails, TEP cool'r, G8 hood. Glass Gearbox.
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  2. #2 Re: Bleeding coolant in LS4 
    Turbo is the way to go. Fivefingerdeathpunch's Avatar
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    I just run with the cap off the tank for a while then shut it off and let it sit for a bit. That lets it bubble up into the tank, top it off, cap it and that's pretty much it.

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  3. #3 Re: Bleeding coolant in LS4 
    GrandPrix Junkie SDGTP99's Avatar
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    I can't believe I forgot how to do that. Bled the coolant this morning. It was messy but it worked.🤦😅
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