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  1. #1

    Default 94 K1500 with small coolant leak

    My 94 K1500 5.7L is dripping a little coolant and I can't find out where. None of the hoses are leaking and it seems like it might be from the back of the engine but I can't see back there to tell. I did do a pressure test at 15psi for ten minutes and it didn't drop a bit. Is that long enough for a normal pressure test? Also, anybody got a clue where the leak might be coming from and how to tell. And anybody got an opinion on those "stop leak" solutions?

  2. #2

    Default

    If it is dripping off of the back of the engine it could be the back of in intake manifold that is leaking.
    93 K1500 5spd 5.7 350
    Holley 670 cfm
    K&N Cold Air
    Hypertech prom
    Custom Exhaust
    Speed pro forged flat tops
    Msd Ignition
    Edelbrock cam

  3. #3

    Default

    I don't have any advice to lend about the leak. But, stay away from the stop leak stuff. Can/will cause more issues down the road.





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  4. #4
    Jr. Apprentice
    Join Date
    Apr 2012
    Location
    Bancroft IA
    Posts
    17

    Default

    I just had this issue myself. It ended up being the hose to the overflow tank was leaking at the radiator while under pressure.

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