WARMER TEMPS

[Rawze]

(06-16-2016 )axe Wrote:  I think I have radiator trouble. Last night it was 67 degrees and truck ran like it always did. Very seldom will get over 185, unless in a really hard long pull. Then it will immediately drop back to 185 or so. Drove thru the night and as morning came and temps rose so did water temp. I usually don't drive with the cruise but I did last night experimenting. Came cross I69 in KY and WKP with cruise on and temp never got over 185. Coming up I71 in KY and OH outside temp was around 90 and water temp would jump to 195 200 just taking off and getting up to speed. It has never run that hot since custom tune. Hell the fan hasn't kicked on a half dozen times since tune. Gonna clean out rad install fan switch and go from there. Thanks everyone.

Don't forget that thermostats can go bad too. when mine started acting up, it would go all the way to 200 when the engine first warmed up, then fall back to 185 and stay there the rest of the day.

As the thermostat starts wearing out on the ISX, the most common symptom is for engine to spike in temp after warming up, then fall back to something lower for the rest of the day. As it gets worse, the temps stays higher than normal all the time and this can lead to major engine problems if not dealt with.