[C320-list] Water heater replacement now coolant.....

[Joe Luciano]

Jamie,

There is nothing magical about boat engine coolant for a diesel engine.  You don’t need Yanmar brand coolant, not sure they even have a branded coolant.  I use the Prestone Dex-Cool, orange stuff.  It comes pre-mixed 50-50 or you can buy it full strength and mix it 50-50 with distilled water.  You can get a gallon for $14 at any autoparts store.  The difficult part is going to be getting all of the air out of the system.  Search the site for a thread on that procedure.  Best of luck.

Joe Luciano
Second Wind #1044



> On May 23, 2021, at 3:20 PM, Jamie Pett <JPett at jp2architects.com> wrote:
> 
> Thanks for the assistance. I am struggling mightily. Got the old heater out but decided it would be the moment to drain and replace the motor coolant. Got it drained but cannot find replacement Yanmar coolant - anyone know where that can be found in the Annapolis area ? 
> 
> 
> 
> Sent from my iPad
> 
> 
> Be well. Be safe. Be kind.
> 
> R. JAMES  PETT  \ AIA 
> Principal
> 
> D. 410.646.8301
> C. 410.446.8515
> www.JP2architects.com
>> On May 21, 2021, at 9:26 AM, Jamie Pett <JPett at jp2architects.com> wrote:
>> 
>> John - Thanks for the help. Replacing the hoses sounds like a good idea - do you recall what length you needed ? 
>> 
>> So the heater hoses are the closed engine loop, correct ? After the replacement I assume you just top off the coolant ? 
>> 
>> Jamie Pett
>> JP2 Architects
>> 
>>> On May 12, 2021, at 9:07 AM, John Meyers <jcmeyers7 at gmail.com> wrote:
>>> 
>>> Jame,
>>> 
>>> One more thing.....  Keep the coolant from the hose, if you want to anyway,
>>> to be replaced after the new heater is connected. There might be a quart or
>>> two. Run the engine for a couple minutes and the engine coolant level
>>> should go down so you can add the old or new coolant. This may take a
>>> couple cycles to get all the air out of the new lines etc and to get the
>>> coolant all back in.
>>> 
>>> As far as the reattaching the rear bracket - I don't remember that being a
>>> problem. As a disclaimer - "Your experience may be different."
>>> 
>>> If I think of anything else I'll let you know.
>>> 
>>> John Meyers
>>> 
>>>>> On Wed, May 12, 2021 at 8:40 AM John Meyers <jcmeyers7 at gmail.com> wrote:
>>>> 
>>>> Jamie,
>>>> 
>>>> I did this a couple years ago.
>>>> 
>>>> Good on the bypass. But I disconnected the end of one hose from the engine
>>>> and allowed fluid to drain into a pan. Then I took off the other hose from
>>>> the engine. Putting a plastic bag over one end and punching a hole in the
>>>> bag I blew out any fluid remaining.
>>>> 
>>>> Obviously , there are some plumbing and other stuff that needs to be
>>>> removed such as electrical.
>>>> 
>>>> There should be enough hose between the engine and heater that when you
>>>> start to pull it out and you can disconnect hoses from heater.
>>>> 
>>>> Getting the old heater out is somewhat cumbersome with lifting and
>>>> twisting but not a huge deal. Same for putting the new one in.
>>>> 
>>>> While the heater was out I replaced the hoses from the engine to heater as
>>>> they were over 21 years old. This was not a big problem as the cubby below
>>>> the oven can be removed to give hand access to the hoses to direct them
>>>> from A to B.
>>>> 
>>>> Hope this helps.
>>>> 
>>>> John Meyers
>>>> Wind Chime #406
>>>> Muskegon, MI
>>>> 
>>>> On Tue, May 11, 2021 at 7:09 PM Jamie Pett <JPett at jp2architects.com>
>>>> wrote:
>>>> 
>>>>> Hi list - hope everyone is well.  So I am tackling a replacement of my
>>>>> hot water heater on Bella Luna and wonder if anyone can provide a bit of
>>>>> guidance. Ordered a replacement unit -same Seaward 6 ga.  that is currently
>>>>> in the boat.
>>>>> 
>>>>> Pulled galley cabinet unit, tied hot and cold water lines together as a
>>>>> temp.bypass, and disconnected power.
>>>>> 
>>>>> So original Seaward 6 ga.unit largely disconnected but did not yet pull
>>>>> the heat exchanger lines off.  Current question - anticipating when I pull
>>>>> those the coolant from the engine will drain out ? Bigger question is after
>>>>> getting the new unit connected, how do I purge the air out of the coolant
>>>>> loop ?
>>>>> 
>>>>> Oh, and any suggestions on how to get the rear mounting bracket
>>>>> re-fastened?
>>>>> 
>>>>> Any advice appreciated. Thanks.
>>>>> 
>>>>> Jamie Pett
>>>>> Bella Luna
>>>>> C-320 # 614
>>>>> 
>>>>> Sent from my iPad
>>>>> R. JAMES  PETT\AIA
>>>>> Principal
>>>>> 
>>>>> D. 410.646.8301 C.410.446.8515
>>>>> 2811 Dillon Street, Baltimore, MD 21224
>>>>> E.JPett at jp2architects.com
>>>>> 
>>>>> 
>>>>> 
>>>>> JP2 A R C H I T E C T S
>>>>> 
>>>>> 
>>>>> 
>>>>> 
>>>>> Be well. Be safe. Be Kind.
>>>>> 
>>>>