Originally Posted by soyuz
Thanks for the replies guys. I did put the temp sensor it hot water was reading 150 so i guess it's working. Did try without the thermostat still goes over 140, I did run the engine for 24 hours few years back never went above 140 even last year after several hours of motor
sailing never went above that. So i am assuming anything above 140 something is wrong. The coolant
pump looks fine put it back on and there is no leak anymore. Not sure how much coolant is in there since every time I disconnect i am losing a bunch but i top it off every time.Now what seems odd is every hose that connect to the heat exchanger
is cold the whole area stay cold even if the manifold and valve cover are hot. Been talking to my neighbor and he thinks there is something wrong with coolant flow maybe a blockage are something like that, not sure what to do next
Just a silly thought but my Westerbeke
is a pain to install the impeller. It may take several tries before I get the raw water
impeller on WITH the woodruff key properly in place - BAD DESIGN !!! If this happens the shaft turns but the impeller does not.
Other usual culprits:
Heat exchanger raw water
side blocked by marine growth.
Heat exchanger glycol side tubes blocked. I have bronze brushes
for rodding out.
Raw water strainer blocked
Raw water intake port blocked.
Exhaust mixing muffler
Several of the above may show as reduced water flow at the exhaust port exit. Check the water out in the exhaust. If there is none, you have isolated the problem.