Egregious
Guru
A few weeks ago I decided to so some PM on my generator which was in perfectly good working order. I removed the H/X and took it to a radiator shop to be cleaned out. Today I returned to the boat and after about 3 hours wrestling with hoses and clamps I finally got the dang thing back in.
"get me a beer" I say to the wife, "and crank the genny." It runs for about 5 minutes and the temp needle is firmly pegged on 100, then at once it jumps to > 180 and soon is somewhere near 200. It normally runs about 180. "Shut it down"
I have raw water flowing out of the side so that isn't the problem. Coolant level seems OK in the expansion reservoir. No leaks that I can see and no hoses are crimped. This is a round, 4 pass H/X and evidently is a pretty common design.
Documentation for WMD 4.4 is no help.
How can I tell if the fresh water pump is pumping? I tried running it for a short period with various hoses removed from the H/X and coolant isn't flowing, but I'm not 100% sure of this since I don't know which end of the H/X is the entry and which is the exit.
Could this be as simple as a stuck thermostat? System needs priming? Is there something the radiator shop could have done to render the H/X useless? I put in a new zinc and new gaskets/O rings on each end cap. Could removing the H/X for a few weeks cause such a failure? I have a hard time believing that the fresh water pump failed exactly when I chose to remove and clean the H/X. There are coincidences, but in my experience 99% of the time a problem like this is related to my activity.
Anything anyone can share would be appreciated. If I cannot get a lead as to what is wrong tomorrow I'm going to have to call a pro.
Woody
"get me a beer" I say to the wife, "and crank the genny." It runs for about 5 minutes and the temp needle is firmly pegged on 100, then at once it jumps to > 180 and soon is somewhere near 200. It normally runs about 180. "Shut it down"
I have raw water flowing out of the side so that isn't the problem. Coolant level seems OK in the expansion reservoir. No leaks that I can see and no hoses are crimped. This is a round, 4 pass H/X and evidently is a pretty common design.
Documentation for WMD 4.4 is no help.
How can I tell if the fresh water pump is pumping? I tried running it for a short period with various hoses removed from the H/X and coolant isn't flowing, but I'm not 100% sure of this since I don't know which end of the H/X is the entry and which is the exit.
Could this be as simple as a stuck thermostat? System needs priming? Is there something the radiator shop could have done to render the H/X useless? I put in a new zinc and new gaskets/O rings on each end cap. Could removing the H/X for a few weeks cause such a failure? I have a hard time believing that the fresh water pump failed exactly when I chose to remove and clean the H/X. There are coincidences, but in my experience 99% of the time a problem like this is related to my activity.
Anything anyone can share would be appreciated. If I cannot get a lead as to what is wrong tomorrow I'm going to have to call a pro.
Woody
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