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  1. 07.5 - 09 6.7L Powertrain
    Just want to check with you guys. I am a mobile service provider and have a customer with an 2007.5 3500 cummins no mods, dead stock. He overheated the entire hell out of it and drove miles home. At first inspection volcano out the reservoir on startup. COOLANT ELBOW ON HEAD LIT ON FIRE while he...
  2. 03-07 Non-Powertrain
    I’ve seen people saying on this cummins forum… always put a genuine cummins thermostat on the truck! Well… I’m waiting for mine to come in the mail, but in the meantime I’m running without a thermostat at all… and here’s why… A week ago I installed all new cooling system components… including a...
  3. 03 - 07 General Discussion
    So in a nutshell I'm having issues with overheating. I noticed it first when I was pulling my travel trailer and my temperature would steadily rise past 225 my high fan would kick on but would not seem to keep up with the rising temperature. I ended up changing my thermostat out for a stock 190...
  4. 2003 & Early 2004 Only Discussion
    So in a nutshell I'm having issues with overheating. I noticed it first when I was pulling my travel trailer and my temperature would steadily rise past 225 my high fan would kick on but would not seem to keep up with the rising temperature. I ended up changing my thermostat out for a stock 190...
  5. 2010-2012 Powertrain
    Hey i got a 2012 dodge ram 3500 and i got some overheating problem that have been going on for a while now. I recently bought the truck from a dealership and it was running fine for the first few days except that i noticed it was running a little hot on the drive home(210-220, a few days later i...
  6. 03-07 Non-Powertrain
    Recently my 2004 5.9 will overheat if I downshift (from 6th to 5th) on hills while towing. The problem goes away as soon as I shift back into 6th gear. I have replaced my thermostat (180F) and radiator cap (the problem persists). The clutch fan module was replaced 20K miles ago, I can hear...
  7. 2010-2012 Powertrain
    Howdy, I've been battling my fan clutch for a while now. My stock fan clutch (AA) was only turning at around 750rpm at 70mph, 6th gear 1700rpm. It would go up by about 100rpm if i went up to 2000engine rpm at 80mph. Its been long enough that I forgot if it changed in the low gears getting up to...
  8. 03-07 Powertrain
    Having some overflow problems. 2003 dodge ram 2500. Changed the thermostat and flushed the radiator several times to clean it out as best I can. Pulled the overflow bottle and it looks like the orifice in the overflow bottle that connects to the line coming from the radiator overflow is tiny. Is...
  9. 2010-2012 Powertrain
    Hey, i got a 2012 dodge ram 3500. i just got this truck a week ago and it started overheating the other day on the highway, i was doing about 70 and wasn’t on it. the temp shot up to 240, it came back down to 210ish while at idle, as i got back on the highway the temp started to crawl back up i...
  10. 2010-2012 Powertrain
    Hey, i got a 2012 dodge ram 3500. i just got this truck a week ago and it started overheating today on the highway, i was doing about 70 and wasn’t on it. the temp shot up to 240 so i pulled over let it cool down and fan kicked on and everything it came back down to 210ish, as i got back on the...
  11. 07.5 - 09 6.7L Powertrain
    Hey everyone ! Looking for some help trouble shooting overheating/ misfire issues with my 2008 6.7 g56, recently replaced the headgasket but did not send head to a machine shop( I know your supposed to) however I checked the head with a size 20 feeler gauge(2000ths) and flat bar and there was no...
  12. 2010-2012 Powertrain
    I have a 2012 2500 that has been acting strange. I went for a drive today and it started overheating and blowing cold air (while the cab heat was on high, full blast). I know that's due to it losing coolant, so I pulled it in the garage and turned it off, coolant poured out. Though it wasn't...
  13. 03-07 Non-Powertrain
    I have a 5.9 common rail that jumps to 220 when i drive at 65mph+ but idles at 190, i threw in a new radiator, thermostat and flushed the coolant and nothing seems to change it. Wanted to see if anybody had this issue and know a solution or suggestions. I appreciate the help (y)
  14. 03-07 Powertrain
    My 2006 ctd 2500 5.9 mega with 130k miles keeps screaming at me from the old edge monitor. Partly because the alarm may be set too low. Are these Temps safe? Proper? My dash says 98F outside, driving up 2k ft elevation, and my old edge monitor shows: 237 engine temp 222 trans temp 20lb boost...
  15. 03-07 Non-Powertrain
    Yesterday my work truck started to run hotter than normal. I checked the coolant and it was full. I ran it and made sure there weren’t any air bubbles. The temp reached 200 and the thermostat didn’t open. I drained the radiator, washed all the coils and changed the thermostat. I drove the truck...
  16. 2010-2012 Non-Powertrain
    2011 Dodge 3500 6.7 full EGR delete. Did not upgrade HG bolts at the time. July 2021 the water pump pulley sheared off while hauling. Replaced water pump and seemed good to go. Drove cross country in September and towards the end of the trip it began overheating. Shop pressure tested and said no...
  17. 2013-2018 Powertrain
    Hey friends, Plain and simple... But maybe not. I'm currently driving across provinces, just outside of the Rockies. I decided to head up a mountain today with my 30fter (huge mistake, didn't research the route) to go on a hike and long story short I brought my trans up to a whopping 260f...
  18. 03-07 Non-Powertrain
    I got in to take off this morning and truck went from 140° to 220° in the blink of an eye. I coasted back home and changed to a new thermostat I had and added the slightest bit of coolant it was missing. My question is regarding the fan. I have read multiple people say it should only run when...
  19. 2010-2012 Powertrain
    Hey y’all, I just finished doing a 2nd Gen swap on a 2012. Encountered a problem last night with the heater not working. This morning driving to work (babying it) after about 10 minutes on the highway temps were at 245+ and when I finally pulled off the engine bay was slightly smoking and had a...
  20. 03-07 Powertrain
    Hey guys, I installed a new fan clutch about a month ago. It was working great until about the last couple weeks.. It hasn’t been kicking on when I’m on the freeway and sometimes driving around town. Ill watch my temp sometimes get to 217 degrees and I’m not even towing anything. This is a daily...
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