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How hard is a thermostat change?

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Old 01-16-2012, 06:27 PM   #1
Collierville, TN
2007 Ford Explorer
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How hard is a thermostat change?

My wife's '07 Explorer 4.0 is showing error code P0128. It looks like it is either the thermostat or hte temperature sensor mounted just behind it. My question is this:

I know the thermostat is in a 3-bolt plastic housing between the intake and the upper hose. Can I let the car sit overnight so the system has no pressure and simply take off the 3 bolts to access the thermostat? I really don't want to drain the whole system and looking for ways to make this easier.

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Old 01-17-2012, 12:08 PM   #2
Bill MacLeod
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I find it easier to just drain the rad down a half bucket, remove upper hose, then remove thermostat housing. Can you access the housing without removing the upper intake?

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Old 02-06-2012, 07:36 PM   #3
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Thats what I did, drained the coolant a little, disconnected upper hose from the radiator end, and swapped out the thermostat. Yes, it's accessible without removing anything else. Three quick bolts, and 28 ft-lbs of torque going back on, I think.
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