John
, I'm pretty sure the thing circled in this pic is the over-pressure relief valve:
How do you strike though text like that????? I've never found a way to do it.There is, I think. I'm not very familiar with what these things look like on boats, but it seems there is one on the top connection, which was plumbed previously as the outlet for the hot water from the heater. Do you think it faulty, or perhaps it is adjusted incorrectly?
Strike that. I spoke too soon. I don't think there is. There is what appears to be an over-pressure relief valve.
Use the s and /s tags inside []How do you strike though text like that????? I've never found a way to do it.
I get that, but I'm pretty sure it's a pressure relief. I unscrewed the top and inside is a ball poppet and spring. The nipple on top is presumably to attach a hose to direct overflow.Dunno, JV.. That looks more like a mixing valve.. (I see hot in from left of tee, cold in the top nipple, tempered hot out the right side of the tee?)
The T&P may be on the other end? of the heater, opposite that stuff.
Yes, Claude, that is so. I reworked a lot of the plumbing there, as it was very poorly designed and executed as I found it; and I think, not Tartan's work, but a previous owner. The water heater bypass broke, and I removed it. I had planned on replacing it but the new unit would not fit in the cramped space available. So, I simply have a cold line just past the accumulator feeding it, and the hot output feeding the hot distribution. Should be simple, no? Maybe I made a stupid mistake, but I don't think so. As I said, I've yet to have an opportunity to do an diagnosis.Many people do that by disconnecting the cold water inlet and connecting it to the hot water outlet so they can run antifreeze in the lines but not in the tank. Turning the hot water tap on would only yield cold water if the lines are not reconnected properly.
As I said, I've yet to have an opportunity to do an diagnosis.Can you feel the coolant pipes near the water heater and net the engine to see if they are getting warm? Has you run the engine long enough (and hard enough)to get it up to temp and have the T-stat open? If the pipes are warm at the engine and cold at the water heater, I would suspect air in the coolant lines. Did you say you had to open the coolant system?
Not sure if the low level in the reservoir means you have low coolant level in the system.
Greg
I replaced a heat exchanger zinc that was completely gone.Do you have zinc sticks inside the exchanger that should have been changed, but might not have been changed?
I do, I will bring it with me this weekend!If you have an infrared thermometer, poking around with that to see what is hot & what is not, may be informative.