New T-stat bad? - Ford Powerstroke Diesel Forum
 
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post #1 of 5 Old 12-04-2011, 12:07 PM Thread Starter
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New T-stat bad?

When i did the coolant flush/swap/filter install, I also changed the t-stat as it seemed to be bad, never allowing the ECT to get above 186-188, unless pushed hard.
From the install, the new one did the same. How often does a new one come out of the box bad? What makes a t-stat fail in the first place?
I can replace it, again, but what if something is making them go bad?
Today I did an EOT/ECT check, 46*F ambient, 65mph, ECT 186-188, EOT 194.
Another new t-stat?

'06, XLT, F350 FX4, Auto, Ext. Cab Short bed
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post #2 of 5 Old 12-04-2011, 12:35 PM
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Quote:
Originally Posted by beemerbiker5 View Post
When i did the coolant flush/swap/filter install, I also changed the t-stat as it seemed to be bad, never allowing the ECT to get above 186-188, unless pushed hard.
From the install, the new one did the same. How often does a new one come out of the box bad? What makes a t-stat fail in the first place?
I can replace it, again, but what if something is making them go bad?
Today I did an EOT/ECT check, 46*F ambient, 65mph, ECT 186-188, EOT 194.
Another new t-stat?
It's good. Mine reads about the same with a new t-stat.

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post #3 of 5 Old 12-04-2011, 12:41 PM
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Originally Posted by dhanna6powerstroke View Post
It's good. Mine reads about the same with a new t-stat.
X2. Just put my t-stat in last week and it stays 186-190
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post #4 of 5 Old 12-05-2011, 05:10 AM
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Ditto, mine are identical also.



2005 F-250 Harley Davidson Edition

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post #5 of 5 Old 12-05-2011, 05:32 AM Thread Starter
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Thanks, guys, what I thought, too. But, reading here just made me think otherwise. Seems the norm is between 190-194.

'06, XLT, F350 FX4, Auto, Ext. Cab Short bed
Diamond Eye Turbo-back 4" exhaust.
CC Mod
Zoodad Mod
ELC swap
Coolant filter
Blue Spring upgrade
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