2012 Dodge 3500 temperature @ 245 degrees - Dodge Cummins Diesel Forum
2010-2012 General Discussion General Chit Chat About the 6.7L 4th generation Cummins - NO ADVERTISING

 
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post #1 of 8 (permalink) Old 09-13-2019, 08:59 AM Thread Starter
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2012 Dodge 3500 temperature @ 245 degrees

So every now and then my truck will read running hot @ 245 degrees then quickly go back to normal of 200-203. Lately its been running hot and not going back. I changed the thermostat thinking it was sticking but still doing it. I noticed that all the antifreeze has been in the overflow reservoir when this happens. I opened the radiator cap while it was hot and only steam came out. I expected bubbling hot antifreeze/water. Any suggestions on what could be causing this?

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post #2 of 8 (permalink) Old 09-13-2019, 09:27 AM
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Head gasket
Been there, done that. It's the head gasket allowing compression pressure to force the coolant into the reservoir and raise the temperature. When you do the head gasket, get the head surface machined and put in your head studs.

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post #3 of 8 (permalink) Old 09-13-2019, 11:30 AM
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I agree with correngcon about it being the head gasket. If it was anything else the coolant jug would be empty because all the coolant would be pulled back into the radiator. I had two head gasket failures on my 2011 CTD that were replaced under warranty and studs ($469 on me) that replaced the head bolts. I think the dealership did them on the cheap, as the truck was never right after either job. It is now in a private, well recommended garage getting new head gasket and new studs. The difference is that this time the head has the warp machined back to flat. It makes me angry that the stealership wouldn't do the job right because it was warranty work, and that doesn't pay much. Oh, btw, when the garage pulled the head off they saw one of the piston faces had contact marks where something had been banging into the head. They figured the injectors had been replaced and thought a nozzle had come loose, but they were surprised when I told them the injectors were original. Another " thank you" to the rip off dealership.

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post #4 of 8 (permalink) Old 09-13-2019, 02:57 PM
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Quote:
Originally Posted by james87johnson View Post
So every now and then my truck will read running hot @ 245 degrees then quickly go back to normal of 200-203. Lately its been running hot and not going back. I changed the thermostat thinking it was sticking but still doing it. I noticed that all the antifreeze has been in the overflow reservoir when this happens. I opened the radiator cap while it was hot and only steam came out. I expected bubbling hot antifreeze/water. Any suggestions on what could be causing this?
So whats the whole story here? Deleted with an H&S or a smarty?

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post #5 of 8 (permalink) Old 09-14-2019, 03:36 AM
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Here's a pretty good visual of what could be going on. (jump to around 24:50 to get right to it)

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post #6 of 8 (permalink) Old 09-14-2019, 09:55 AM
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Itís his tuning settings. Same as Den 52.

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post #7 of 8 (permalink) Old 09-16-2019, 01:50 AM
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So whats the whole story here? Deleted with an H&S or a smarty?
I'm very curious what a delete has to do with higher engine temps. Mine is deleted with H&S mini maxx and will get up to about 220 when pulling.
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post #8 of 8 (permalink) Old 09-16-2019, 03:16 PM
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I'm very curious what a delete has to do with higher engine temps. Mine is deleted with H&S mini maxx and will get up to about 220 when pulling.

Deleting doesn't cause it. It usually helps lower them.
Incorrect tuner set up, Timing versus fueling and or using defuel settings with the Mini on a 4th gen. Lifting or picking away at the HG VIA higher cylinder pressures. Once air/combustion gases get into the water jacket, cooling is now affected. It will cause these temp spikes and overflow the coolant reservoir after the 18 psi has been breached at the rad cap. Where else can it go?

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