My engine normally warms up to about 195 degrees but since about two days ago, i've noticed that it has only been warming up to about 150 - 160 degrees. Any idea what could cause this? Is it likely that my thermostat is stuck open?

 

YEP first place to look is thermostat, use cummins replacement not a jobber part, save money and headaches in the long run

 

Where would you recommend getting one online? They closed down our nearby dealer so i'd have to drive 30 miles out of my way to pick one up and i'd rather just get one delivered.

 

Sorry can't help there, try any diesel shop that works on cummins-not dealer

 

Or you could just call Cummins in Vancouver and ask for the parts dept. I bet they'll ship it out to you if you don't mind paying postage or UPS or whatever it is you Canuks use up there.

http://westerncanada.cummins.com/wps.../westerncanada

Wait a minute, where are you located?

 

I'm located in Jefferson County, West Virginia.