Sorry, wasn’t thinking as I was typing. Diesel means no carb, so rainwater ingress would be thought the air cleaner into the intake manifold, and then through intake valves in the cylinder head. Not real likely. Mine was a sort of special case caused by the PO’s extreme frugality when installing the Diesel engine.
Generally I agree that the oil cooler is the most likely problem. If the engine was running when the boat was hauled and never overheated, the blown head gasket seems like a pretty low probability. Rick Brass Sent from my iPad > On Oct 26, 2023, at 20:13, Doug Mountjoy via CnC-List <cnc-list@cnc-list.com> > wrote: > > 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 >> 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
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
