i have a problem my 98.5 ton temp want stay on 180.ive have rad roded,cummins stat,and new fan clutch.temp still getting hot can somebody help me

 

whats wrong w/ 180?

 

im running 195 pulling and 185-190 on flat.

 

This is probably not a problem. It could be your gage is off a little or the thermostat itself is off a little. You could put the thermostat in a pan of water on the stove with a candy thermometer to see at what temperature it opens. You could also put a good quality aftermarket gage in the engine temporarily to verify the accuracy of the oem gage. These engines won't suffer any damage unless they get MUCH hotter than that. One other thing: if the thermostat is in backwards, you'll get wild swings in operating temp. Please don't ask me how I know that.

 

I'm running a 195 T-stat and it runs about 190-200*F degree normally for my truck. I've never seen anything higher than 200*F

180*F is just fine.

Drive it... Its a cummins it will last forever!

 

yea 180 is good but it want stay on 180.i moves alot it will get to bout 210 or 215 with nothing but a 16ft trailer it has just started this

 

Have you cleaned your rad ever or even lately? Is it a 180f t-stat? Check backside by fanblades, if oily you will have to remove it to clean properly with a degreaser, then relocate puke bottle. This will cause engine to run hotter if rad is plugged on outside of fins with oil. You mention you had rad "roded", I would guess you mean flushed internally? Can you hear fan engage, then does engine temp drop down at all or keep increasing? Have a look and let us know what you've found, temp shouldn't go that high past t-stat opening with a light load like that, unless it's full of cement.

 

rad has been took off and cleaned.tstat is a 180.i did notice blades oily but didnt know if that would cause this.temp does drop after fan engages temp will stay at 180 for awhile then steady climb.

 

Check out this thread it will explain the cure for the breather bottle.

https://www.dieseltruckresource.com/...ad.php?t=82828