Heads up on 6.7 Cummins

[Wrench]

It breaks underneath...

 

[displacedtexan]

View attachment 1002607

Exactly.

The bolt typically breaks under the nut, so that weld won't help.

Thanks for the visual.

 

[Wrench]

Exactly.

The bolt typically breaks under the nut, so that weld won't help.

Thanks for the visual.

They're all married together so they don't fit through the head like just a nut and broken bolt can.

 

[Big_wals]

I just disconnected mine for now. This is the kit I’m planning on using when I get around to it. Quite a bit cheaper than the Banks if you’re just worried about the grid heater and aren’t wanting a new intake.

KILLER GRID HEATER UPGRADE KIT DODGE/RAM 6.7L CUMMINS 2500/3500 PICK-UP 3500/4500/5500 CAB & CHASSIS 2007-2024

The Killer Grid Heater Upgrade Kit is purpose-built to address a major flaw in the 6.7L Cummins engine that can result in total engine destruction.

us.bddiesel.com

 

[colby12]

Was there a change with newer trucks to make this more prevalent? I didn’t know it was an issue but from this thread and what I have been able to find on other forums of people having it happen it’s all post 2017ish models. Does anyone know personally of this happening to an 07.5? When did this start happening?

 

[Choupique]

Was there a change with newer trucks to make this more prevalent

To the best of knowledge, it is the same grid heater used on all of the 6.7 cummins.

There may have been changes in the EGR or the heater duty cycle that is driving higher failure rates, if that is indeed the case.

Again, everybody - jiggle test

 

[hebertbrian]

I just disconnected mine for now. This is the kit I’m planning on using when I get around to it. Quite a bit cheaper than the Banks if you’re just worried about the grid heater and aren’t wanting a new intake.

KILLER GRID HEATER UPGRADE KIT DODGE/RAM 6.7L CUMMINS 2500/3500 PICK-UP 3500/4500/5500 CAB & CHASSIS 2007-2024

The Killer Grid Heater Upgrade Kit is purpose-built to address a major flaw in the 6.7L Cummins engine that can result in total engine destruction.

us.bddiesel.com

Am considering this option also, anyone with feedback after doing this?

Sent from my Pixel 9 Pro Fold using Tapatalk

 

[displacedtexan]

They're all married together so they don't fit through the head like just a nut and broken bolt can.

But the bolt breaks under the nut... And it's already through...

 

[Wrench]

And the nut is welded to the heater....so it sits in the intake and throws a code for no contact.. but can't go anywhere.

 

[OneGunTex]

Is this essentially the KDP for guys with fancy new trucks? IYKYK

 

[Weldor]

My buddies 16 with low miles was pretty scary when he pulled it at 40k, about 1/3 of the nut was gone barely holding on. Charcoal for sure. There are plenty of stories to go around and plenty of fixes too. It is just a crappy design that nobody wants to admit to.

 

[Weldor]

As for tigging up the nut, if I'm going to take it apart to weld it might as well replace it with a coil heater and new intake.

 

[mt terry d]

Was there a change with newer trucks to make this more prevalent? I didn’t know it was an issue but from this thread and what I have been able to find on other forums of people having it happen it’s all post 2017ish models. Does anyone know personally of this happening to an 07.5? When did this start happening?

From the Cummins Forum:

Hello. Been reading about this stupid bolt that breaks or what have you in the grid heater causing engine failure. What are the affected years? Having a hard time finding that specific information. I have a 22 and was curious if this model year is affected. Thank you

It can happen from 2013-23 but not a likely failure especially with the 2021+ grid heater relay change

Geeze Colby, I feel your pain. Bummer.

If I had a 6.7 I'd put in that BD Kit yesterday.

 

[Weldor]

Ok, dumb question? So they did a relay change in the 21's, is there a retro fit to put the new style relay in older trucks?

 

[mt terry d]

Ok, dumb question? So they did a relay change in the 21's, is there a retro fit to put the new style relay in older trucks?

Also from the forum:

It can happen from 2013-23 but not a likely failure especially with the 2021+ grid heater relay change

Yeah....now the whole truck just burns to the ground!

Yeah....now the whole truck just burns to the ground!

But the relay does not stick on like the old solenoids could

You'll have to research more as I have an '05 and my own problems

 

[Weldor]

Also from the forum:


Yeah....now the whole truck just burns to the ground!


But the relay does not stick on like the old solenoids could

You'll have to research more as I have an '05 and my own problems

Right on. That was the problem on my friends 16, sticking relay or solenoid. Like I said it cooked that nut constantly according to him and the mechanic. Here in AZ why would even call for it to come on unless its below zero. Seems like a computer system re-program? Maybe too easy for Cummins.

 

[mt terry d]

Every year all vehicles are made to just possibly outlast the warranty period.
Then they are disposable.
Engineered that way.
That's a fact.
........................................................................
Mine comes on almost always, regardless of outside temp. I always have let
it run its course then crank it.

However, I'm chasing a weird noise on startup and unhooked the grid heater and
relays from the battery to eliminate that possibility.

It's been warm here (MT) but every morning its just started exactly the same
as ever with it unhooked.

 

[HuntCrazy]

I'd worry more about the hydraulic lifters in the new cgi block trucks than the grid heater bolt in the old 6.7s...

this right here on the new ones.......

 

[HuntCrazy]

for what its worth.... you can take it apart and delete it your self with the stock stuff you already have and litteraly spend $0 I have 40K on mine since deleted in in Socal so grid heater isn't really needed either.....
Also.... fun fact.... double check all fuel lines before you fire it up.....