I read that it was normal, but I also read that it had been fixed by an updated thermostat. I guess I just don't like the thought of the engine being heated and cooled so drastically all the time. But I do like having a real gauge
Quote from geno's garage:
# Wide fluctuations of the temperature gauge
* the result of a large radiator, it is relatively harmless and normal
* Cummins has released a revised T-stat that does fix the "problem". The revised T-stat Cummins part number is 3934373. (The old T-stat Cummins Part number is 3928499. )
So according to this cummins sold me the "old" thermostat, I guess it's my fault for not asking for the new part number specifically, I assumed they didn't sell the old one anymore
. Has anyone tried the "new" thermostat, how does it work? I would think it just opens slower?