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Milky Oil

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WCP

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" HELP!!!!

Yes, it's me


" HELP!!!!

Yes, it's me with the 431 Lincoln again. Battery recently died, and boat nearly sank - 1 foot of water over floorboards. Caught it in time, but . .

There was a substantial amount of water in the oil. I drained it immediately (without running!), and refilled. The water was so high (covering the last spark plug), I was worried that it may have backed up through the manifolds, so I pulled all plugs, pulled the coil wire and shut off the gas, and cranked the engine. I was surprised to have shot a good amount of water from Number 1 Cylinder (furthest away from the stern!). Refilled with oil, restarted, and figured I was good to go, but oil turned milky, almost immediately.

I changed the oil 5 more times (including pumping the sump dry twice with plugs out and oil filter off), with the same results. The last time I did it, I pulled the plugs again, and noticed a mist of water coming from that same cylinder again. Note that during the summer, I NEVER noticed any milkiness at all.

The possibilities as I see them are: 1) there is a leak in head gasket, manifold, etc. which was previously small enough that the hot oil was able to evaporate off but somehow was worsened by this event (although the water was in the boat for less that 5 days); 2) somehow, water is still inside the engine after the six changes; 3) this is pure coincidence, and a gasket or manifold failure just happened to coincide with the near sinking.

It is difficult to tell, but the manifolds have likely not been changed in some time (if ever), so this is something that should be done anyway. Will likely explore this, but I was hoping for something more definitive for this particular situation.

Any other thoughts? If water entered the engine, I would have thought it would be in the bottom, not top cylinder(s). How many times does it take to normally purge all contaminated oil?
Thanks again for everyone's help. "
 
"By your description, it sound

"By your description, it sounds like water is continuing to enter the engine. One thought on removing the milky oil....is your reverse gear (transmission) lubricated with engine oil or ATF? Engines of this era could have either, like a manual Paragon or a hydraulic Velvet Drive. Either way, make sure the tranny fluid or any engine oil in the housing is removed and replaced.
An engine oil lubricated reverse gear can be a hiding place for contaminated oil if it can't drain completely due to design or mounting.

Seeing water in a cylinder after the engine has been run and had several oil changes is pretty good proof of water getting in. The culprits are frequently rusted out exhaust manifolds, intake manifolds, cracked heads or block, and gasket failure. On older engines the reason for gasket failure is often the use of cheap automotive gaskets in place of marine duty items. It's hard to say from here, but yeah, you could have a coincidental leak or one aggravated by the soaking. Check the tranny, though.

"
 
" Croozer:

This is a hydrau


" Croozer:

This is a hydraulic Paragon gear that uses ATF (Yes, I had to change that three times, also). Guess I've got a bigger problem.

Thanks for your response - you confirmed my suspicions. "
 
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