No, 200-210 depending on outside weather is acceptable. No SIG, so I have no idea what mods (if any you have) and you don't have a location specified, so maybe I will just assume you're in Arizona where its like 110F outside.

Check your coolant levels and see if you have broken fins or obstructions to the radiator(s)..

 

maybe do a radiator flush or pressure wash your radiator out.. could be ineffective due to crud, bugs, whatever on the outside.. the inside could be partially plugged. also, perhaps your thermostat is not operating properly, ei opening fully... just some ideas... I run my H&S mini on HOT all the time, cruising on freeway around 75mph in 105* outside air temps, maintains 190-195 very well.. cheapest easiest things are to clean radiator, inside & out...

 

I am pretty sure you are OK it's doing just what mine is doing and it's been hot here 96+

 

The truck is stock. I just put a new radiator in it. I was thinking a thermostat to but I just wanted to see what other people thought

 

Delete it if that's a viable option for you. Temps will decrease if your still concerned.

 

My buddy had a similar problem. But he was hitting 240 on upgrades towing. Ended up being his clutch fan wiring was bad. Rewired and she's running within normal temps now.

 

I plan on deleting it someday. But changed the t stat today. Ran under 200 on freeway home from work. Got in it 10 mins after I got home and drove it to the store started running about 210 again on side streets. I'm starting to wonder if it's a fan clutch?

 

Little odd. My truck never gets over 205 city driving in near 100 degree weather.

 

But what's weird is it doesn't do it all the time

 

Thermostat would be a quick fix. Since you have a new radiator. When filling. Ok... So I've been told. Air bubbles can get trapped in the radiator causing it to run hotter. Not sure this is completely true. But you might want to investigate this a bit.

 

I agree, I had that happen on my other vehicle. When the system was filled back up it was filled cold. When the Thermostat opens, you all of a sudden have empty space in the radiator. Leave the cap off and idle the truck up to temp to where the thermostat opens and see if you need to top it off. When moving you will stay cool enough but once you hit side streets you will run hot.

 

Replace the thermostat, do a coolant flush, and maybe a fan clutch as well.

 

has anyone put a 180 thermostat in the 6.7s, I went to napa to get one because I done it in the 5.9 I had and it dropped the temp of the mototr pretty good so I was wondering if anyone has done it on the 6.7

 

If you just did the rad, then after checking/topping off fluid you need to burp it. Possible the t stat but do the burp/ top off first.

 

I just replaced the water pump on my 6.7. When you refill with coolant, make sure your open the "vent" on top of the engine. The vent is located at the top of a black pipe that sits above the engine. The vent pipe has a sticker on it and instructions to open the vent when filling with coolant. The vent allows air to escape as you fill.

My vent was screwed in pretty tight. Be wary as I have read reports of the vent screw being difficult to remove. Mine came free with a little extra pressure, more than I would expect though.

Good luck

 

DodgeCumminstittle92, I thought about doing the same. But after talking to several different mechanics. They explained that the normal operating temperature of the 6.7 cummins was 200. So I stayed away from the 200. Doesn't mean they're right. Just what the general consensus showed. So I stuck with it.

 

I put a 195 in mine when I did all the front engine components, even when it's been 101 plus outside my temps are between 190 and 210