Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil?
G GOvols12 Recruit Joined Jul 24, 2020 Messages 1 Jul 29, 2020 #1 Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil?
Scott Danforth Grumpy Vintage Moderator still playing with boats Staff member Joined Jul 23, 2011 Messages 49,901 Jul 29, 2020 #2 GOvols12 said: Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil? Click to expand... 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?
GOvols12 said: Mercruiser 470 has lost all coolant. Manifold has crack but is that why I have milky oil? Click to expand... 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?
