I have researched and researched and researched and still canít find a solution to my problem. So today, after 2 years of engine overheating
issues and trying every possible solution, Iím going to ask for help.
I installed a 6gal water heater
on my Niagara 35 a couple of years back. I was going to install the heater
hoses in parallel, as most people do, until I found a service
bulletin from Westerbeke
stating that a water
heater should be installed in series in the coolant
system. As per the bulletin, the coolant
hose coming off the exhaust
manifold and going to the heat exchanger
should be interrupted, go to the water heater with a bypass nipple to help with flow if the water heater coil is too small and return back to the heat exchanger
. And after 2 years of trying to make this setup work
by eliminating every other source of possible overheating
issues, Iíve come to the conclusion that I need to have the water heater installed in parallel.
Iíve read every thread I can find about this topic but canít find an answer that works for my specific situation. The engine
is a fresh water cooled Westerbeke
W40 with a V-drive. So my engine is ďbackwardsĒ. There is a plug
next to the thermostat which I assume is meant to be used for a water heater but unfortunately it is seized. Iím still attempting to get it out but havenít had any success yet. There is a coolant temp switch to activate an alarm
at the front of the block which I no longer need so I thought I could tap off of that as a feed or return to the WH. I can also tee off of the coolant temp sender. There is also a plug
in the top of the heat exchanger which I thought could be a potential return point but this would be bypassing the thermostat when itís closed so itís probably not a good idea.
So with all that said, can anyone give me a good solution?
The water heater is installed about 8 feet forward of the engine and the coil is below the highest point in the system. The hoses have to run under the cabin sole
and then back up to the water heater.