33*, ECT at 220!? - Ford Powerstroke Diesel Forum
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Old 12-20-2012, 12:43 PM
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33*, ECT at 220!?

Well firs of here is a little background on the truck
05 dually 127000 miles
Bullet proofed 4500 miles ago
studs, gaskets, egr delete, new oil cooler, coolant ect.
New injectors 1000 miles ago (one failed so i replaced them all factory)

Other mods in SIG

On so lately here in missouri it has gotted down in the low 20s a coupel nights mostly high 20s, low 30s. So ive had a piece of cardboard in fron of the radiator to help get the truck war since i have a short drive to work and around town. This morning it was 40* and had to make a 30mile trip. I left the cardboard in for about 10 miles or until the truck got to 180* By this time it was 33* out. Took it out and the temp stayed around 185 for a couple miles then it started to rise. It got to 226 FAST and i pulled over and popped the hood. had coolant coming out of the degas lid. I let it cool to 185and took off all was fine. let the truck sit for an hour and all was fine still until i got about half way home and it started to climb again to 216. I pulled over and let it idle and it dropped below 200. I noticed the heat would blow cold everytime the ECT would rise. It did this again on the way home. But I heard the fan kick in and ECTs dropped to 176 befor the fan let off.

I cant wrap my head around this. would the valve before the heater core cause an over heat problem? I dont drive the truck hard and have not had a problem like this before. I wouldt think the new head gaskets would have blown. Coolant level looks fine.
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Old 12-20-2012, 01:05 PM
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Are you still running the oem water pump?
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Old 12-20-2012, 01:12 PM
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What make of thermostat?
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Old 12-20-2012, 01:16 PM
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it has got to be water pump or thermostat... give me a pm on here im in missouri i can try to get you hooked up some where
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Old 12-20-2012, 01:20 PM
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AS far as i know it has the origional water pump and thermostat.I checked coolant again and it was a littel low from it blowing out the cap. I went to ford ang got a new cap and some coolant. I had them order a thermostat as well.

mytractorsexy you have a pm.
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Old 12-20-2012, 01:25 PM
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Id do the cap/thermostat first. (easy things first) then go after the water pump. Ive got BPD's water pump and radiator very nice combo....
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Old 12-20-2012, 09:55 PM
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If still puking after that studs may have been done wrong
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Old 12-21-2012, 06:36 AM
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Im gonna replace the thermo stat tomorrow and see what happens. as for now its running fine as i have not had to go on long trips. ECTs have not got above 170.
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Old 12-23-2012, 06:06 PM
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Update. I have not replaced the thermostat yet as i am having trouble finding cat-ec1 coolant. Replaced the cap and it happened again the next day. Did not get near as hot but the heat quit blowing and i saw the ECTs climb pretty rapidly. Got out of the throttle and slowed down it stopped climbing and then started to fall. Soon as i find some coolant i will replace the thermostat. Any other ideas?
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Old 12-23-2012, 06:17 PM
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I would swap the t-stat now. Do you have a clean container? Drain about 2 gallons of coolant from the valve on the bottom driver's side of the radiator and keep it clean of contamination. Swap out the thermostat and replace the recovered antifreeze into the degas. This will get you by for now. Once you get your hands on new antifreeze then do the flush/refill.
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