Had my block heater plugged in today for 3+ hours and still only hit about 75 degrees on my scangauge. That's plenty warm to get it started but still nowhere near operating temp and not much heat. Most of the time I only have time to leave the block heater plugged in for an hour or so.

Is there a 1500w heating element I can install in my 6.0? The factory heater is supposed to be 1000w but I measure only 900. I have seen them for the 7.3 but not the 6.0. Does anybody know what size the threads are?