Posted by PM Baker on July 26, 2011 at 05:33:42 from (24.110.108.198):
My MF 30B, Perkins AD 3.152, has coolant draining out the radiator overflow tube. It seems the prior owner solved the problem by installing a 150 degree thermostat, and a 13 lb cap, because I just installed the MF correct 180 degree thermostat and 7 lb cap, and the fluid is just pouring out the overflow tube. It stopped after draining like over 1 gallon out. The engine temperature was OK, but the cooling system is 2.5 gals, and it's only running on 1.5 gallons.
The engine does seem to me to take a long time to get up to operating temperature. Was the same with the old thermostat and now the new one. I thought the temperature gauge might not be working, so I used a laser pyrometer on it and it verified that the gauge was fine. I assume the engine cooling system is super overbuilt.
There was not one trace of water present in the crankcase when I changed the oil, and it looked like it had not bee changed in some time. I re-checked the oil and no water in it.
Might it not be a headgasket leak behind the sleeves or someplace where it does not get into the crankcase?
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