Should I replace my thermostat? - Ford Powerstroke Diesel Forum
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Old 11-12-2012, 07:15 AM
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Should I replace my thermostat?

Truck runs 180-185 all the time, but it does take a long time to get there. Infact that's the main reason I have remote start on it, it can high idle for the 15 minute run time of the remote start and only get to about 130, after I start driving for about 10-15 minutes it gets up around 185 an stays there. I bet it would help my fuel mileage a good bit if I didn't have to run the truck a good 15 minutes every morning.

I would say its quick and cheap, just do it. But my ebp sensor is bolted to it, so it's a little more trouble.
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Old 11-12-2012, 07:36 AM
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If you are in La and are having a hard time with warm-up, then yes, I would say change the T-stat.
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Old 11-12-2012, 07:45 AM
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For sure swap it and it should help. Just a word of advice though only buy them from Ford or International. All the other ones I have used either leaked or where stuck open after the first drive.
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Old 11-12-2012, 08:25 AM
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Change it sure.... Dont forget even with a new one your truck is a diesel and it will take a while to warm up just sitting at idle. Gets warm when you drive it...
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Old 11-12-2012, 08:26 AM
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Mine stays at 174 on my edge but the heat is hot it will rise some but not much am I havin the same issue
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Old 11-12-2012, 08:34 AM
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Yes Kevin your ect should easily break 190*.
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Old 11-12-2012, 08:54 AM
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My eot is around 194 and 200 but the ect is steady at 174 climbing up hills it may reach 180 so is my thermostat stuck open? Also I thought you wouldn't have any heat if it was not working?
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Old 11-12-2012, 09:28 AM
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Mine also runs around 180-182, but it was at 190-192 when it was summer, since the cooler temps it has been running at 180-182 on the cts, should it always run in the 190s no matter what outside temp is?
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Old 11-12-2012, 09:34 AM
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180's - 190's is normal depending on ambient temps but if it's constantly running in the 170's and struggling to hit 180's then you need a new thermostat.
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Old 11-12-2012, 09:41 AM
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Thanks Tuscany!! Its been in the 30s- mid 40s here in indiana, my cts shows at 55-60mph ect- 180-184 and eot is -188-192. So i dont think thats too bad, im hoping to get the egr delete and a bpd oil cooler at tax time and a coolant filter. Other than that truck runs great!!
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