westerbeke w58
After running and engine cools down, I loose about a pint of coolant in overflow tank over night. This continues daily when not in use.
No sign of any water in oil, but I do notice (what I think is) a spert of coolant in exhaust at startup.
I’ve pressure tested coolant system. Cap is 14lbs so I went to 13lbs pressure. Pressure did drop to 9lbs and held over night. No external leaks noticed.
Attached pressure tester on cold engine removed heat exchanger zinc, pumped pressure and did get raw water leaking out of zinc installation hole - but I did notice leaking a bit without pressure..?hmmm
Next connected pressure tester on cold engine. Started engine and did not see immediate rise in pressure - until engine started to warm up. I think this indicates head gasket is okay. If head gasket leak I would think I’d have seen immediate pressure increase as soon as I started engine.
Might this be heat exchanger end cap gasket issue? Any other test suggestions?
Engine runs great, rapid starts, no oil consumption over entire season. If I use the boat continually as over the summer as we do, little to no loss of fluid.
I’m stumped - any ideas?
After running and engine cools down, I loose about a pint of coolant in overflow tank over night. This continues daily when not in use.
No sign of any water in oil, but I do notice (what I think is) a spert of coolant in exhaust at startup.
I’ve pressure tested coolant system. Cap is 14lbs so I went to 13lbs pressure. Pressure did drop to 9lbs and held over night. No external leaks noticed.
Attached pressure tester on cold engine removed heat exchanger zinc, pumped pressure and did get raw water leaking out of zinc installation hole - but I did notice leaking a bit without pressure..?hmmm
Next connected pressure tester on cold engine. Started engine and did not see immediate rise in pressure - until engine started to warm up. I think this indicates head gasket is okay. If head gasket leak I would think I’d have seen immediate pressure increase as soon as I started engine.
Might this be heat exchanger end cap gasket issue? Any other test suggestions?
Engine runs great, rapid starts, no oil consumption over entire season. If I use the boat continually as over the summer as we do, little to no loss of fluid.
I’m stumped - any ideas?