Water from the exhaust seems unlikely at this point, it would have to flow uphill quite a ways to get into the exhaust manifold. And plus this engine is a diesel so no carburetor or anything like that. the only possible thing I can think of is either a blown head gasket or the oil cooler.
Douglas Mountjoy 1988 LF 39 Mexico at large 1984 Sabre 34 Port Orchard, WA On Thu, Oct 26, 2023, 16:53 Rick Brass via CnC-List <cnc-list@cnc-list.com> wrote: > I'm not sure that condensation would be a likely source for any > significant amount of water to get into the engine oil. The only real point > of entry would be some sort of reverse flow through the EGR valve, which > doesn't seem like it would be likely to admit much water vapor - > particularly in a semi-arid area. And any rainwater would need to get in > through the carburetor and likely collect in the intake manifold and have > little chance of leaking into the oil pan. > > > > The suggestion of a leak in the engine oil cooler seems a likely > possibility, assuming you have one on that engine model. > > > > Another might be having water in the exhaust manifold when the engine was > shut down that leaked back into the engine through partially opened exhaust > valves. I lost an engine on my 38 that way: The PO had cut corners when the > original A4 was replaced by the diesel, and when the boat heeled to port > while sailing water in the lines and muffler could get back into the > exhaust manifold. Was OK for a long time because starting the engine blew > the water out. But I lost a rudder, had to be towed in, and during the > months that the boat was on the hard during the replacement the water > leaked into the engine and corroded piston rings to the cylinder wall so > the engine would not start - which required a rebuild or a new bobtail > engine (which turned out to be less costly). Never looked at the oil pan on > the old engine, but seems pretty likely there was water in there. > > > > Of course, YMMV. Good luck with the engine. > > > > Rick Brass > > Washington, NC > > -----Original Message----- > From: Stus-List <cnc-list@cnc-list.com> > Sent: Oct 26, 2023 7:06 PM > To: Stus-List <cnc-list@cnc-list.com> > Cc: Korbey Hunt <kampf2...@hotmail.com> > Subject: Stus-List Re: Water in the oil > > > Yes. Good possibility, my boat is in Loreto/ Puerto Escondido. I was in > San Carlos a few years ago. Fun town. > > Get Outlook for Android <https://aka.ms/AAb9ysg> > ------------------------------ > *From:* Doug Mountjoy via CnC-List <cnc-list@cnc-list.com> > *Sent:* Thursday, October 26, 2023 12:27:55 PM > *To:* Stus-List <cnc-list@cnc-list.com> > *Cc:* Doug Mountjoy <svrebeccal...@gmail.com> > *Subject:* Stus-List Re: Water in the oil > > There was enough water to turn the oil to chocolate milk. Could be > condensation, there was a couple of nasty storms that came through here > this summer. I'm in San Carlos MX. in the desert. Didn't have this problem > last year. I'm kinda thinking it might be the lube oil cooler. > > Douglas Mountjoy > 1988 LF 39 > Mexico at large > 1984 Sabre 34 > Port Orchard, WA > > > On Thu, Oct 26, 2023, 11:32 Jeff Nelson via CnC-List < > cnc-list@cnc-list.com> wrote: > > How much water? A little could be condensation... > > Cheers, > Jeff Nelson > Muir Caileag > C&C 30 - 549 > Armdale Y.C. > > On 2023-10-26 14:59, Doug Mountjoy via CnC-List wrote: > > I have a Yanmar 4JHE in my boat. After 4 months sitting on the hard, I > > have water in the oil.Does anyone know where the most likely place for > > leaking is? > > When I put her away last spring, I had flushed the engine and let the > > hoses drain. > > I'm at a loss here. > > > > Douglas Mountjoy > > 1988 LF 39 > > Mexico at large > > 1984 Sabre 34 > > Port Orchard, WA > > > > Please show your appreciation for this list and the Photo Album site and > help me pay the associated bills. Make a contribution at: > > https://www.paypal.me/stumurray > > Thanks for your help. > > Stu > Please show your appreciation for this list and the Photo Album site and > help me pay the associated bills. Make a contribution at: > https://www.paypal.me/stumurray > Thanks for your help. > Stu > > > Please show your appreciation for this list and the Photo Album site and > help me pay the associated bills. Make a contribution at: > https://www.paypal.me/stumurray > Thanks for your help. > Stu
Please show your appreciation for this list and the Photo Album site and help me pay the associated bills. Make a contribution at: https://www.paypal.me/stumurray Thanks for your help. Stu
