the ECT/EOT delta "test" should be done unloaded at 65mph cruise, on mostly "level" HWY, start test when ect has reached a min temp of 190degrees F, check ECT/EOT deltas 5 to 10min later, if temp delta exceeds 15degrees F, likley cause is clogged oil cooler.
Originally Posted by Powerhead357mag
I went and bought a goose neck about 400miles away yesterday! its a 24k capacity but just had a smaller 14k bumber pull trailer loaded on top. My ECT was a steady 218 and EOT was 238 running 70 on mild hills from GA to FL. On the longer steeper hills ECT went up to 228 for a short bit. But no puking or coolant lose. the truck is a completely stock 2003 F350 with a flat bed. Those temps seem high to me what do yall think?