[that damn cummins]

so ive been noticing my temp gauge has been going back and forth from 200 to about 180 when i take off and when at wot and but cruiseing its 190 it really weriod?

 

[that damn cummins]

Try venting the cooling system where it say to vent when filling..... Mine did the same thing until I did it. I had a air bubble from installing the egr delete.....

when i open it is coolent going to fly out or just air

 

[that damn cummins]

Coolant wont fly out, just open the plug until you have coolant coming out and tighten it back up...... Not trying to offend anyone but make sure the truck is cool when you do this.

lol no problem i did that on my nova once