'01 Coolant Leak - Ford Powerstroke Diesel Forum
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post #1 of 5 Old 01-19-2014, 01:14 PM Thread Starter
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'01 Coolant Leak

I have an '01 7.3L powerstroke. I noticed this morning there was a puddle of coolant under my truck. I looks like the coolant is leaking from the top side of the water pump when the truck is off, but it is hard to see. The leak seams to stop when I start truck up. Does anyone have suggestions on what this could be caused by? Water pump? Thermostat housing?

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post #2 of 5 Old 01-19-2014, 01:28 PM
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Mine leaked from the thermostat housing, the temp sensor by the thermostat and finally the pump. Now I think its just from where the lower house attaches to the pump. Got to replace that gasket.

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post #3 of 5 Old 01-19-2014, 02:01 PM
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Grab. The cooling fan and check for slop in the water pump bearings.


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post #4 of 5 Old 01-19-2014, 03:32 PM
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Mine was leaking around the stock thermostat housing, put one on a billet one from diesel site which fixed it. Might check yours, mine had rusted pretty bad.

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post #5 of 5 Old 01-19-2014, 03:46 PM
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Does the hose on the tstat have the spring clamp or a regular clamp? Usually regular outside temps will make it leak because everything shrinks when its cold. When engine warms up everything swells sealing the leak. Look at the 3 bolts on top of the tstat if that area is wet then its the clamp. If coolant is coming out below it, its the gasket.


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