thermostat time ? - Ford Powerstroke Diesel Forum
 
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post #1 of 6 Old 06-02-2012, 08:19 PM Thread Starter
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thermostat time ?

I went on a good 100mi. road trip today, deltas were very good EOT never over 197 even when pulling the altamont ( decent hill ) at 65 with about 2k in the bed, when the ECT was at 194 EOT 197 pulling the hill, but after the hill the ECT would drop to 178 and slowly come up to around 184 or so and stay in the 180's for a while the EOT would slowly come down and likes to run about 192-194 on the flat at 65, but the coolant likes to run low. So should I change the thermostat is it staying all the way open when it should close down some and keep the temp at 190 or above? Thanks for any and all input, Mike.

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post #2 of 6 Old 06-02-2012, 09:01 PM
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When was the last time you changed it? It sounds bad to me and cant ever hurt to change it if it has been a while. They are cheap and easy to change.

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post #3 of 6 Old 06-03-2012, 02:59 AM
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Just changed mine, it looked trashed when I got it out. I'm surprised it worked at all. It was running at 184 deg.

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post #4 of 6 Old 06-03-2012, 03:07 AM
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I changed mine yesterday mine was running 183* to 194* and would take for ever to warm up. Now it runs around 190* all the time. So I think you might need a change IMO!

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post #5 of 6 Old 06-03-2012, 04:23 AM
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Yes you need to change it. Sounds like it's not completely failed open yet just taking a while to close back up after fully opening on the grades. Eventually it will just stick open and you'll never see 190* on your coolant! It's easy and cheap to do and your truck with thank you for it!

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post #6 of 6 Old 06-03-2012, 09:46 AM Thread Starter
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Thanks, I'll pick one up and get that temp where it needs to be.

revised stc dummy and stands, blue spring, sinister coolant filter, riff raff boots, rotella 5w-40 t6, dead kitty, diamond eye 4in w/muffler, ccv mod, hole saw zoodad, edge insight cts, sct x3 innovative, on 07 drw f-350 4x4 lariat crew long. w/goose neck.
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