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470 Mercruiser coolant loss issue

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  • 470 Mercruiser coolant loss issue

    Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil?

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    Originally posted by GOvols12 View Post
    Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil?
    could be.

    could also have a leaking water pump seal because the cam snout has a groove in it (common issue)

    could have also lost the head gasket. as little as a 10 degree overheat is all it takes for the head gasket to go bad.

    how did your exhaust manifold get a crack in it?
    Cheesehead boating the Gulf Coast of FLA 27.51° N, 82.53° W

    1988 Cruisers Rogue 2420 -VP 290 DP now powered by custom 468 - https://forums.iboats.com/forum/owner...988-rogue-2420

    Past Boats
    1970 Wooster Hellion - Merc 9.8
    2002 SeaRay 190BR - 5.0 - A1G2 - "Cheeseheads in Paradise"
    1984 Avanti 170DLI -3.0 stringer- "Ship Happens"

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