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Go Back   SailNet Community > On Board > Gear & Maintenance > Major Oil leak
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Thread: Major Oil leak Reply to Thread
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Topic Review (Newest First)
04-02-2007 09:21 PM
camaraderie bhcva..thanks for the update!
04-02-2007 09:14 PM
dleit Does the oil filter housing look at all distorted or swollen?
I am not familiar with Yanmar, but almost all engines have an oil pressure relief valve that is supposed to open & send extra oil back to the oil pan if too much pressure develops.
If this valve sticks it can cause the oil filter to swell up & distort & create a leak where he filter attaches to the block. If this is to occur, it probably will be on a cold start when the oil is thick.
Often the pressure relief valve is part of the oil pump, but it may be a separate valve on the engine, as I said, I am not familiar with Yanmar.
04-02-2007 09:04 PM
bhcva "then screw it on by hand pretty tight but not as tight as you could make it. "


After a similar oil spill my boatyard tells me that Yanmar now requires that filters be tightened mechanically...more than by hand.
04-02-2007 09:03 PM
sailingdog LOL... and sometimes refreshing the thread helps too.
04-02-2007 09:00 PM
Faster
Quote:
Originally Posted by sailingdog
Faster-

I doubt this is the problem, as the boat was at the dock the second time... Also, sounds like they hadn't even made it out of the marina the first time around.
D'oh.... note to self: Read all the damn posts... thanks SD
04-02-2007 08:55 PM
sailingdog
Quote:
Originally Posted by Faster
I'm not familiar with the Yanmars, and indeed the problem was likely the filter o-ring.

But here's another thought... Were you motor sailing prior to these incidents? I know that some Bukh diesels will pump their entire oil reservoir into the bilge if they are run at too great a heeling angle..... Given the time between leaks could there be a correlation there??
Faster-

I doubt this is the problem, as the boat was at the dock the second time... Also, sounds like they hadn't even made it out of the marina the first time around.
04-02-2007 08:49 PM
Faster I'm not familiar with the Yanmars, and indeed the problem was likely the filter o-ring.

But here's another thought... Were you motor sailing prior to these incidents? I know that some Bukh diesels will pump their entire oil reservoir into the bilge if they are run at too great a heeling angle..... Given the time between leaks could there be a correlation there??
04-02-2007 08:02 PM
sailingdog That makes sense... the less frequent the maintenance, the more likely the o-ring is to stick in place..
04-02-2007 08:00 PM
poopdeckpappy
Quote:
Originally Posted by sailingdog
Poopdeckpappy-

I take it that this is the voice of experience speaking... Hadn't even thought of that...

Yes and I have seen & heard this many times, happens more often then not with motors that see less than routine maintanence

And by routine I don't mean just by hours, but also routine by time lapsed
04-02-2007 06:59 PM
sailingdog Poopdeckpappy-

I take it that this is the voice of experience speaking... Hadn't even thought of that...
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