Water pump leak below thermostat - Ford Powerstroke Diesel Forum
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Old 12-25-2011, 06:33 AM
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Water pump leak below thermostat

I did a coolant flush to ELC and replaced the thermostat a few months back and noticed that I had a coolant leak. I assumed the housing was leaking so I eventually got a new thermostat housing and new upper hose. Today I checked it and it's still leaking but not from the housing. It's leaking under the housing where the water pump bolts to the block. I checked the bolts were tight and they were so I'm assuming I need a new gasket?

Guessing if it's a new gasket I might as well replace the pump since it's gotta come out. I have 141k on it.
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  #2  
Old 12-30-2011, 07:17 PM
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is it leaking out between the front cover and the block or the pump and front cover?

either way put a pump in it and check the front cover for signs of cavitation, if it decides to let go you may loose a fan in the process.

Last edited by sinner6.0L; 12-30-2011 at 07:20 PM.
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Old 12-30-2011, 07:21 PM
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I used just a new gasket and still leaked at the thermo housing, pump, and lower metal hose. Took it all off and put sealant on all the mating surfaces. Blue I think.
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Old 01-29-2012, 03:36 PM
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Went ahead and replaced the pump. Working just fine now.
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