2015 RAM 2500 6.7L Cummins - Valve Lash Adjustment?

**timshooter40** · 03-17-2023

Originally Posted by egolsen

After putting studs in, I set mine to the standard settings of .010 and .026.

The truck was quiet and has been running fantastically for the last year.

Mine has undergone significant weight loss.

Yep same here.

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**C-MAN** · 03-17-2023

Thank you for the helpful replies, guys!

I am a little OCD, so I apologize for LOL.

I just wanted to ensure I was on the right track with the .026 lash on the exhaust because when setting the lash, I didn't expect the bridge to wobble back and forth as much, "sloppy," if you will, even with that spec.

This is my first time in the valvetrain on a cummins, and I guess Iignoredo that part on teardown.

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**northstarfire0693** · 03-18-2023

Originally Posted by rsl0311usmc

These will also help you out if you are OCD like me when it comes to getting the right feel of the gauge you use.

I used angled regular ones when I did mine originally.

But another member told me about these, so when I do my head studs, I am going over everything with these.

Attachment 15525

I have a set of those.

They work great.

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**Opie011** · 05-28-2023

Getting ready to do this and the question I have...is it necessary to remove the injector harness like I've seen a few people do on youtube?

Probably going to set mine at .010 & .020

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**AK Bob** · 05-28-2023

Originally Posted by Opie011

Getting ready to do this and the question I have...is it necessary to remove the injector harness like I've seen a few people do on youtube?

Probably going to set mine at .010 & .020

No need to remove the injector harness unless you are removing the head or injectors.

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**Chrisn162001** · 05-28-2023

Originally Posted by Opie011

Getting ready to do this and the question I have...is it necessary to remove the injector harness like I've seen a few people do on youtube?

Probably going to set mine at .010 & .020

I remove the injector harness and the lower cover.

For me it’s a lot easier to set lash on 5 and 6 with them removed.

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**Opie011** · 05-28-2023

Originally Posted by Chrisn162001

I remove the injector harness and the lower cover.

For me it’s a lot easier to set lash on 5 and 6 with them removed.

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What's all involved, just removing the little nuts?

What's their torque spec?

13in/lbs?

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**Chrisn162001** · 05-28-2023

Originally Posted by Opie011

What's all involved, just removing the little nuts?

What's their torque spec?

13in/lbs?

Yup, 8mm to take off the harness leads on the injector.

Barely snug 1/4 inch short ratchet lightly tighten with one finger tight LOL.

It doesn’t take much to snap one of those studs, and then you need a new injector.

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**Opie011** · 05-28-2023

Originally Posted by Chrisn162001

Yup, 8mm to take off the harness leads on the injector.

Barely snug 1/4 inch short ratchet lightly tighten with one finger tight LOL.

It doesn’t take much to snap one of those studs, and then you need a new injector.

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Cool, thanks for the info!

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**BuckMeister** · 05-28-2023

Originally Posted by Chrisn162001

You are overthinking it a little bit.

10 and 26 will be fine.

10 and 20 are quieter and idles a tad smoother.

I set them at 8 and 18 for stock trucks with deletes to trucks over 900hp.

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What's the rationale behind 8 and 18?

I might have to try that.

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