Oh yeah thanks for reminding me of that one! :-(. In addition to replacing the head gasket, I also had two big radiator bills from the blow by of the head gasket !
Bill Coleman On Wed, May 13, 2020, 1:34 PM Shawn Wright via CnC-List < cnc-list@cnc-list.com> wrote: > Not sure if this is common on Yanmars, but on VW diesels, a common source > of slow coolant leaks is the head gasket. There are a few places where > coolant passages can seep coolant into the combustion chamber, which occurs > during cooldown when the engine is stopped. During operation, the higher > pressures of both the oil passages and combustion chamber don't allow > coolant to escape, and in the worst cases, cause the coolant system to the > overpressurized due to combustion gases. A symptom of the latter is to > install a pressure gauge on the coolant tank, and run the engine from cold. > If pressure builds up quickly, then you have combustion gases entering the > system, as pressure from heat will take several minutes. > Again, not sure if this applies to other engines, but I've seen it several > times on VW diesels, often caused by pitting of the aluminum head due to > infrequent coolant changes. > -- > Shawn Wright > shawngwri...@gmail.com > S/V Callisto, 1974 C&C 35 > https://www.facebook.com/SVCallisto > > > On Wed, May 13, 2020 at 9:11 AM Della Barba, Joe via CnC-List < > cnc-list@cnc-list.com> wrote: > >> We have: >> >> Bilge from any point in the system including the water heater >> Exhaust via combustion chamber >> >> Exhaust via raw water from an internal heat exchanger leak >> >> Internal leak in the water heater (yuck!) >> >> A leak someplace in the manifold that dumps into either the intake or >> exhaust >> >> A leak someplace in the recovery tank >> >> >> >> I think we got to 6 now. A pressure testing cap for the heat exchanger >> should find many of these. I cannot emphasize enough to CHECK THE OIL. I >> know more than one person who was puzzled by an inboard engine GAINING oil >> and then soon after was buying a new engine. It was water in the crankcase >> floating the oil up higher. If you run it like that the oi whips up into >> brown foamy goo that does not lubricate well at all. I had one such engine >> and we drained the water out each day until it died for good. Crap >> Mercruiser engine L >> >> >> >> *Joe Della Barba Coquina C&C 35 MK I* >> >> *www.dellabarba.com <http://www.dellabarba.com>* >> >> >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com] *On Behalf Of *Marek >> Dziedzic via CnC-List >> *Sent:* Wednesday, May 13, 2020 11:53 AM >> *To:* cnc-list@cnc-list.com >> *Cc:* Marek Dziedzic <dziedzi...@hotmail.com> >> *Subject:* [EXTERNAL] Re: Stus-List Loss of coolant >> >> >> >> Theoretically, one more place - water heater (if fitted). >> >> >> >> Marek >> >> >> >> >> >> -------- Original message -------- >> >> From: "Della Barba, Joe via CnC-List" <cnc-list@cnc-list.com> >> >> Date: 2020-05-13 10:35 (GMT-05:00) >> >> To: cnc-list@cnc-list.com >> >> Cc: "Della Barba, Joe" <joe.della.ba...@ssa.gov> >> >> Subject: Re: Stus-List Loss of coolant >> >> >> >> It is only going one of three places – the bilge, the exhaust, or the oil. >> >> Check the oil for coolant contamination ASAP and check the exhaust for >> excess steam and/or white smoke. The bilge should be obvious ;) >> >> >> >> >> >> *Joe Della Barba* >> >> *DCSI* >> >> *410-966-7255* >> >> >> >> >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com >> <cnc-list-boun...@cnc-list.com>] *On Behalf Of *Bill Coleman via CnC-List >> *Sent:* Wednesday, May 13, 2020 9:34 AM >> *To:* cnc-list@cnc-list.com >> *Cc:* Bill Coleman <colt...@gmail.com> >> *Subject:* [EXTERNAL] Re: Stus-List Loss of coolant >> >> >> >> Not in a 3JH4E, but I did in my Olds Custom Cruiser Wagon, with one of >> those 350 Modified Diesel Engines. Those were not up to the task which I >> knew going in, but I just loved that car. It was common for warpage at the >> head gasket, I think the coolant leaked into the oil, tho it may have gone >> out the exhaust, I don’t remember anymore. I just remember loosing the >> coolant, and several hundred dollars. >> >> >> >> Bill Coleman >> >> Erie PA >> >> >> >> *From:* CnC-List [mailto:cnc-list-boun...@cnc-list.com >> <cnc-list-boun...@cnc-list.com>] *On Behalf Of *Glenn Henderson via >> CnC-List >> *Sent:* Wednesday, May 13, 2020 8:47 AM >> *To:* cnc-list@cnc-list.com >> *Cc:* Glenn Henderson >> *Subject:* Stus-List Loss of coolant >> >> >> >> My Yanmar 3JH4E has been slowly leaking coolant. I motored for 14 hours >> and it lost 5mm of depth in the reservoir. The reservoir is approximately >> 4" DIA. I checked thoroughly for visible signs of leaking and found none. >> Has anyone had this experience? >> >> >> >> Glenn Henderson >> >> WeGo >> >> C&C 41 >> >> >> >> _______________________________________________ >> >> Thanks everyone for supporting this list with your contributions. Each >> and every one is greatly appreciated. If you want to support the list - >> use PayPal to send contribution -- https://www.paypal.me/stumurray >> >> _______________________________________________ > > Thanks everyone for supporting this list with your contributions. Each > and every one is greatly appreciated. If you want to support the list - > use PayPal to send contribution -- https://www.paypal.me/stumurray > >
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