maybe the engine oil temp sensor?!! - Ford Powerstroke Diesel Forum
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Old 04-07-2013, 02:36 PM
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maybe the engine oil temp sensor?!!

ok so here it goes. 06 f-350 king ranch. bought the truck at the begining of the year. bought it in arlington tx and was moving to ny, ny. first day on the road radiator blew and ford fixed it. At that time they told me that the eot-ect deltas were at 14*. so we continued to drive with no problems havent driven the truck much since we were up here, just short distances no problems. deltas were still at 14*. Last week put the truck in the shop for an egr delete and oil cooler. got the truck back and the deltas are 12*. wtf so i said screw it i flushed the whole coolant system catching everything. nothing came out (i.e.-sand gunk rust etc.) test drove it again the deltas were still at 12*. was thinking they would be higher since the flush but no difference. so the system must be spotless i guess. checked all the hoses no grim slim or anything clean as could be. so i a cut open the old oil cooler and there was no clogging what so ever. every row was clean as could be. i was surprised. so i then cut open my coolant filter and nothing in there either. just put it on about 600 miles ago. so the only thing i can think of is that the oil temp sensor and messed up. when i check it in the morning while cold the temps between coolant and oil is about 7* or so difference. someone please help with a solution.

oh also the mechanic that did the swap for me said the hpop was brand new turbo looked brand new no play in it at all and that someone had done a lot of work under the hood right before i bought it.

Last edited by thumper280zx; 04-07-2013 at 02:44 PM.
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Old 04-07-2013, 03:18 PM
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With a cold engine prior to starting, read eot, ect, and ait. They should all read within a few degrees of each other. Whichever one is not correct, replace. In the morning, you could also compare it to the outside temp on the overhead console, if you have one. Mine would read with each other after sitting over a cool night.

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Old 04-07-2013, 03:22 PM
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10-4
yeah i checked it this morning and they were about 7 degrees difference between each other but i was paying attention to what the outside temp was. all i know is its been cold as heck up here for a texan lol.
also what is a few degrees and is the coolant temp usually a little colder than the oil temp after sitting overnight

Last edited by thumper280zx; 04-07-2013 at 03:29 PM.
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