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Thread: Oil in bilge question

  1. #1

    Oil in bilge question

    One of my engines overheated a few weeks ago after the raw water intake got clogged. Afterwards I noticed lots of engine oil in the bilge and the level was low. After fixing the clog and adding oil, I ran the engine and it doesn't appear to be leaking oil anymore - sort of hard to tell as the bilge is a mess. I cleaned up most of the oil using cat litter, but it's still pretty oily. No water in the crankcase either, so I don't think the head is cracked.
    Could the oil of come from the rear main seal, and if so has it really stopped? Where else could the oil come from?

  2. #2
    Senior Member easttnboater's Avatar
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    What type/size of motors?

  3. #3
    They are Chrysler 360s. I took a closer look this weekend, and was able to see oil still coming out. It's coming out pretty fast; a small stream ;-(
    It's coming out towards the back, but not underneath - more like around the oil filter adapter. I've read several accounts of the gaskets going bad around the adapter so I'm hoping it's this and not the rear main seal. I can't imagine the main seal leaking this much oil this fast - aren't mail seal leaks more of a drip, drip pace?

  4. #4
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    Uggh. Sorry to hear about the troubles. I am taking on replacing the manifolds this week. Fingers crossed I don't discover any other issues.

  5. #5
    Senior Member easttnboater's Avatar
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    I am not a Chrysler engine guy, so I don't know what their failure points are. If it overheated bad enough, you may be talking warped block. Hopefully you just fried the oil filter gasket.

  6. #6
    Good news. I ordered and received a gasket kit for the "oil filter adapter", replaced it and no oil leak! Now I have to clean up the mess in the bilge.

  7. #7
    Senior Member BananaTom's Avatar
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    Quote Originally Posted by fisheatingbagel View Post
    Good news. I ordered and received a gasket kit for the "oil filter adapter", replaced it and no oil leak! Now I have to clean up the mess in the bilge.
    Congrats.

    Dawn Dish Soap

  8. #8
    Member KC55's Avatar
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    Good to hear

    I'm glad it turned out to be relatively minor. Could you explain the "oil filter adapter", is that a remote mount for the oil filter?

    KC55
    1974 Kingscraft 55x15
    1987 Ebbtide 190 Catalina Open Bow w/Mercruiser V8


    http://www.kingscrafthouseboats.com

  9. #9
    KC55,
    It's a small casting that "adapts" the filter to the block. I guess Chrylser made several, to allow different engine mounting options and allow access to the filter.

  10. #10
    Senior Member ShoreBound's Avatar
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    What do you guys use to clean up oil residue in the bilge? I have a little big of oil in my bilge that has dried onto the aluminum bottom of the boat, and it doesn't really want to come up. I have loosened it up with a pressure washer, and then used one of the oil absorbing pillows, but it doesn't come out very well. What about an engine degreaser? I am afraid to use it in the hull, because I don't know if I can ever get it out conveniently. Cannot pump it into the lake!!

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