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Old 01-05-2014, 09:26 AM
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Help! Thermostat? Frozen?

Guys just bought another 6.0 with all the mods I drove it up from Florida to Missouri and upon going to breakfast this morning the EOT and ECT hit 220. I immediately shut the truck off let it cool down and drove it back home. I had no heat either. Not sure what's going on the temp is 6* and the truck has been in Florida since new. I was actually on my way to get a block heater cord because of the cold temps here... Think it could be the thermostat stuck or just frozen or what? Pulled the degas cap and rad fluid started pouring out. Need to have this fixed asap wind chills are supposed to be -30 tomorrow. Thanks
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Old 01-05-2014, 10:12 AM
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If it's not the OEM thermostat in it YES.

Make SURE to ONLY USE OEM Thermostat in the engine. $28.00 at Ford you can of coarse use International's too.

The OEM fails in the open position where aftermarket ones fail stuck shut.
Good Luck with it. Yea start there for sure!!
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Old 01-05-2014, 11:01 AM
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Yeah just left ford with an oem thermostat. Mechanic on duty said if the system was frozen it would shoot the freeze plugs out of the block. I m hoping it's just a thermostat.
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Old 01-06-2014, 05:54 AM
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Did you by chance check the anti freeze to see if it will handle cold temps? If it's been a FL truck, the previous owner may not have a proper mix.
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Old 01-06-2014, 02:12 PM
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Ended up getting everything taken care of yesterday. Radiator, hoses etc were frozen. I did however check the coolant mix before I left so I would not run into this situation but the gauge I used was very old and obviously did not work properly because it said the temperature was good to -20. Needless to say most of the fluid was water, I tested it with my gauge and it was only good to 20 degrees.

With a little redneck ingenuity I was able to defrost the cooling system and refill it with the proper mixture. I blocked the wind to the truck off with 3 pieces of ply wood, fired up 2 torpedo heaters underneath the truck and directed the heat up toward the front end. In 2 hours the coolant was 105 degrees after that it was smooth sailing. The weird part is the upper rad hose and the degas bottle were not frozen so I assumed the rest of the system was clear which led me to believe it needed a thermostat but after grabbing the lower rad hose it felt like a sonic slushy.

So far everything on the truck seems to be ok just glad it did not pop the freeze plugs or cause any other damage.
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Old 01-06-2014, 06:42 PM
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Good to hear you got it taken care of quickly. Might be a good idea to toss a coolant filter on it

2005 F350 CCLB FX4
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Old 01-10-2014, 06:55 AM
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Yeah Juniorssrollin as soon as I bought the truck I ordered one. Should be here shortly
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