migara422

I just bought this boat about 1 month ago, i noticed that the dipstick looked a little milky so i thouht maybe condensation, well i just came from the lake and there is alot of this crap now, i opened where i put oil in the valve covers and its this muddy color, why is this? what causes this to happened, this is a crate 502 still under warranty of course in another state, maybe there is something simple that is happening, i would appreciate yourhelp on this.

marinetrans

What kind of exhaust and what brand/make of motor?

migara422

stainless marine, 502 chevy

mcollinstn

Possibilities:

Exhaust reversion: caused by long duration cam allowing manifold vacuum to pull water into combustion chambers and past piston rings.

Leaking or damaged exhaust manifolds: casting flaw of damaged gasket allowing similar situation as above.

Headgasket: leaking or broken.

Cylinder liner: crack

Intake manifold: corroded or leaking at gasket.

Oil cooler: damaged or broken from improper winterization.

Engine block: damaged from improper winterization (most likely around lifter gallery)

Excessive water pressure at speed: can occur on motors running a crossover instead of a circulating pump.

good luck.

migara422

thanks for the help, is there a posibility that this is happening when i put a hose to it, i ususally turn the engine off before i take the ears of the drive.

mcollinstn

Not likely.

Your motor should have no trouble flowing the 5 gpm that comes out of your garden hose, whether it is running or not. If the thermostat is closed, it still diverts water out to the exhaust manifolds. And if you are using a standard set of muffs, it is difficult to force water in at more than a few psi cause the muffs spew.

migara422

what is the water temp supposed to be at? i know its kinda winter but i live in florida and today it hit 80 degrees and my water temp was 120 at the most, is this right?

Steve_H

do you know if the factory head gaskets were replace with felpro or better gaskets before being used in the boat? the cheap factory gaskets will not hold up under marine use.

i found this out the hard way with the first boat i bought

migara422

i really dont know, im waiting a call from the guy a bought the boat from but if i can recall its a marine engine, brand new 502 about 40 hours now.

migara422

oh btw did i mention i have the biggest migraine do to this, i had to jet boats before and everytime i wanted more speed i ended up blowing something up, now i bought a boat with a brand new engine and i wanted to keep it stock for that reason and now this,man this sucks