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Power Strokes
6.7 Tech
Coolant Temperature questions
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[QUOTE="NEVRNF, post: 1429341, member: 709"] Truck seems slow to warm up. Temps have been as low as 16* and as high as 35* over the last week. I plug in and remote start it and after 12-15 minutes I usually get out of the house. Coolant temp usually shows about 100* when I get in the truck. 1st 12 miles is stop and go and temp gets up to about 150* as I get on the highway. 10 miles to my exit and it is up to 190's when I get off. Tonight we went and did some running and at the last stop I sat in the truck and waited as I thought it was going to be an quick in and out. About 15 minutes went by and I noticed it did not seem as warm and the temp showed 155*. We left to go back to the house. 15 minute drive in traffic and the temp only came up to 180* . Compared to my old 7.3 which stayed at 200* all the time this seems strange. Previous owner said he had a coolant leak and had replaced the thermostat last year. I just did the rest of my weight savings on Thanksgiving and also drained the cooling system and refilled with fresh coolant. I have never seen a thermostat act like this and I don't know when he replaced it if it was q OE or aftermarket. I am wondering if I have a cooling fan clutch sticking? If seems to have the normal amount of drag when spun with the engine off. Could it stick at operating temp and get free when cooled down? Being new to the 6.7 I have some learning to do. [/QUOTE]
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