Thermostat question - Ford Powerstroke Diesel Forum
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post #1 of 17 Old 04-23-2012, 11:32 AM Thread Starter
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Thermostat question

I have read on here that the factory T-stat opens at around 192. I just got my CS awhile back and keeping a close eye on my temps. I am noticing that my ECT is hovering around 186-188 around 60-70 mph. I know when i first started looking at my temps it was in the mid 190's but my EOT was a lot higher and i was pulling at the time. I am thinking my T-stat is bad? Am i thinking correctly?
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post #2 of 17 Old 04-23-2012, 11:35 AM
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I wouldn't say so... around 188* is very close and many other things could influence that number like ambient temp. That temp is good for being unloaded



towing you will see higher temp which is normal!

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post #3 of 17 Old 04-23-2012, 11:37 AM
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Mine is right around 188 most of the time unloaded not towing. Under good load goes to mid 190s. I think your ok.

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post #4 of 17 Old 04-23-2012, 12:09 PM Thread Starter
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Thanks. Bad news is that is that puts my deltas around the 14-15 range. Looks like some work in the future.
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post #5 of 17 Old 04-23-2012, 12:17 PM
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My t-stat is bad....my ECT temps actually drop when I get up to speed. My ECT usually hovers about 186-190 until I get up to about 70ish, then it drops down to about 182 until I get off the highway and get down to about normal 50ish speeds. Then my ECT goes back to normal temps of around 188.

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post #6 of 17 Old 04-23-2012, 12:21 PM
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sounds as if it may be stuck open
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post #7 of 17 Old 04-23-2012, 12:21 PM Thread Starter
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Quote:
Originally Posted by TruckNorris View Post
My t-stat is bad....my ECT temps actually drop when I get up to speed. My ECT usually hovers about 186-190 until I get up to about 70ish, then it drops down to about 182 until I get off the highway and get down to about normal 50ish speeds. Then my ECT goes back to normal temps of around 188.
I believe that is what mine was doing. I took a trip up the interstate this weekend and they seemed lower than when i was just going down that backroads and getting up to speed. I think the lowest mine went was down to 184 or 185.
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post #8 of 17 Old 04-23-2012, 12:25 PM Thread Starter
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Originally Posted by streetglider View Post
sounds as if it may be stuck open
That's what i was oringinally thinking. I guess a new one isn't that expensive, i might try to replace it and see what happens. at least if it was bad, i will feel a little better about my deltas. I am hoping to buy enough time to save up and buy the BPD kit and not have to mess with the OC again like so many do over and over here. Doesn't sound like fun to me.
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post #9 of 17 Old 04-23-2012, 12:27 PM
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I've seen mine get down to 180. I'm not really worried about it at the moment. My EOT normally hangs at about 192-194 with my ECT at about 188-190. I keep about a 0-6 degree difference until I hop on the highway, then the gap gets bigger since the ECT drops, but then it gets right back to normal once I get to a normal driving speed. I'm just gonna keep it on there until I do a coolant flush.

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post #10 of 17 Old 04-23-2012, 12:30 PM
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pop a 20 dollar T-stat in it should be ok
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