I am quite confident in saying yes but should also warn that I am not a Yanmar mechanic or engineer.
Here is a video that might help show the manufacturer's designed flow paths and defend why you would be fine to plug the ports where the nipples go into the engine. https://youtu.be/ZFddsMQ52wk Josh On Mon, Jun 8, 2020, 10:39 Hoyt, Mike via CnC-List <cnc-list@cnc-list.com> wrote: > Hi Josh > > > > So this means that if our hot water or bus heaters ever develop a coolant > leak we can plug the hoses and engine will be okay? > > > > Mike > > > > *From:* CnC-List <cnc-list-boun...@cnc-list.com> *On Behalf Of *Josh > Muckley via CnC-List > *Sent:* June 8, 2020 11:30 AM > *To:* C&C List <cnc-list@cnc-list.com> > *Cc:* Josh Muckley <muckl...@gmail.com> > *Subject:* Re: Stus-List Yanmar cooling system and water heater bypass > > > > Yes. They can be dead ends. That is the way the system was designed by > the engine manufacturer. Owners simply steal water from the inlet and > outlet side of circuit. There are usually plugs where the pipe nipples tap > into the engine. > > > > I have a few pictures and a video. I'll see about sharing the ones of > value. > > > > Josh > > > > On Mon, Jun 8, 2020, 10:03 Bruno Lachance via CnC-List < > cnc-list@cnc-list.com> wrote: > > Hi Mike, > > > > Mine was in the V berth, too much of a run and produced almost no heat. > Yours is way closer to the engine. I want to remove it because i found that > when motoring, the engine heats the cabin to a "comfortable temperature". > And it takes precious space. > > > > I understand your setup, cleaner design and probably better performance > with no Tees and shorter circuit. But you have a loop. I want to know if > the hoses that go to the heater can be dead ends ? > > > > Bruno Lachance > > Bécassine, 1987 33-2 > > New-Richmond, Qc > > > > > ------------------------------ > > *De :* Hoyt, Mike <mike.h...@impgroup.com> > *Envoyé :* 8 juin 2020 09:46 > *À :* 'cnc-list@cnc-list.com' <cnc-list@cnc-list.com> > *Cc :* Bruno Lachance <bruno_lacha...@hotmail.com> > *Objet :* RE: Yanmar cooling system and water heater bypass > > > > Hi Bruno > > > > We installed a bus heater (what you described) on Persistence. We already > had a hot water heater so we simply had the hose that ran from the > exchanger go to the bus heater and then from there to the hot water > heater. No Tees of any sort. Did not affect the hot water heater > adversely and works well for heating on cool fall days and for deliveries. > Only issue would be that increased hose runs and number of fittings > increases chance of a coolant leak at some point > > > > The bus heater on persistence is on the forward end of the quarter berth > blowing toward nav station. Layout of Frers 33 is pretty much identical to > your C&C 33-2. This location also makes the bus heater close to engine and > shortens the length of hos run as much as possible > > > > Mike Hoyt > > Persistence > > 1987 Frers 33 > > Halifax, NS > www.hoytsailing.com > > > > > > *From:* CnC-List <cnc-list-boun...@cnc-list.com> *On Behalf Of *Bruno > Lachance via CnC-List > *Sent:* June 8, 2020 10:41 AM > *To:* C&C List <cnc-list@cnc-list.com> > *Cc:* Bruno Lachance <bruno_lacha...@hotmail.com> > *Subject:* Stus-List Yanmar cooling system and water heater bypass > > > > > > Hi, > > > > I just remove a air heater that was nstalled by premious owner. It was T > in the coolant hoses going to the water heater but never woeked well. I > guess the hoses running in the bilges was too much of a heat loss. > > > > So anyways, i'm going back to original and simplicity and i remember > somebody here said he added valves to have the option to "bypass" the water > heater in case of a leak. Since i already have the valves and my tank is > original it seems to be a good idea. My question is: can i just install > them in line on each hose or do i need to add a loop before the valves with > T fittings , engine side of the valves, so i still have circulation. I > think it does't matter and that the engine system does not depend on this > but i want to be sure. > > > > Thank you. > > > > Bruno Lachance > > Bécassine, 1987 33-2 > > New-Richmond, Qc > > > > _______________________________________________ > > 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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