View Single Post
Old 07-31-2011, 11:22 AM   #8
tomtomterrific
Veteran Member
 
tomtomterrific's Avatar
 
Join Date: Jun 2010
Posts: 33
RE: 120 Lehman overheating

OK here's this morning's report:
I filled the coolant, it took 2 gallons
Checked raw water seacock for proper operation
Ran at fast idle for 40 mins and temp didn't rise above 170
Thermostat opened and coolant was flowing
Ran for an hour at 6-7 knots and temp did not rise above ~190
Idling back to mooring temp dropped back down to 170
No leaks form circulating pump
All hoses look good, no leaks at any connections
Raw water intake elbow cool to touch
Exhaust water warm to touch (about the temperature of hot shower)
I'm waiting for it to cool down and I'll check the expansion tank for coolant loss

I've called a local mechanic to replace the impeller as a next step.
I'll pick up an IR temp gun as well.

I had the heat exchanger and trans cooler replaced this year but not the oil cooler

Any additional thoughts-advice are appreciated

Thanks Gentlemen,

Tom
tomtomterrific is offline   Reply With Quote