Valve Adjustment on 6.7

[Topzide]

Wanting to know if there's anything unusual about doing the valve lash adjustment on my 6.7? Have the barring tool for engine rotation. Looks to be pretty straight forward but was making sure that I'm not overlooking anything that others have come across. Have the grille quick release system on truck so I'll have a nice place to knell instead of standing on milk crate and bending over the grille! This is were I wish I had cement drive and an overhead creeper! No matter, maintenance must be carried out. Thanks for any tip or tricks provided.

 

[sag2]

Just like a 5.9, very straightforward.

 

[Cummins12V98]

Forget the barring tool, simply use the nut on the alternator.

 

[Topzide]

Thank you. From looking at factory service manual, it looked pretty straight forward. If weather holds and stays dry, it'll be done Monday - Tuesday.

 

[Ltngdrvr]

How many miles on the engine?
Service interval for checking lash is 150K, and when we checked mine at that point it was still in spec.
Mine didn't actually get adjusted until they pulled the head for a bad valve spring at 270K, and hasn't been redone since and it's at 592K now.

 

[NIsaacs]

I would think a valve spring change could be done without pulling the head?

 

[lpennock]

I would think a valve spring change could be done without pulling the head?

Depends on if you think the valve had been damaged. I you are just replacing springs you wouldn't need to pull the head. If the spring had broke, you should pull the head to very the valve condition.

 

[Ltngdrvr]

I would think a valve spring change could be done without pulling the head?

Depends on if you think the valve had been damaged. I you are just replacing springs you wouldn't need to pull the head. If the spring had broke, you should pull the head to very the valve condition.

Yes, pulled head to inspect the cylinder.
Plus, I don't think a dealer tech would replace a valve spring without pulling the head anyway.

 

[Topzide]

Have just over 150K and wanted to check to make sure within spec. I've got the time and not much different than what I used to due on a Toyota 22R back in the day. This will also allow me to inspect the valve train for any issues before they become an issue! Plus being a diesel, gives me the sound check to be aware of going forward.(out of spec sound vs in spec sound comparison) Appreciate all the info and insight from members. Great tip on using alternator nut for rotating the engine. Will use the barring tool for the TDC set and the alternator nut to rotate for next set since this will allow me to watch valve train when rotating. Looks like weather will hold with lower temps to get done this am. Again, thanks to the members for making this forum a valuable resource for all members!

 

[Ozymandias]

Well you only need one full rotation for all 24 valves to be set.
No need to turn it over and over again.

And yes it's the same on 6.7.

 

[Topzide]

Found valves to be within spec. One more maintenance item checked off the list!

 

[Topzide]

Well you only need one full rotation for all 24 valves to be set.
No need to turn it over and over again.

And yes it's the same on 6.7.

Thanks for the info. I do have the factory service and wiring manuals for my truck. Only issue I had when doing was not being able to get barring tool into crank pulley and alternator has a hex key pulley that I don't own allen wrench in the right size! 14mm to small and 17mm was to big, just my luck! Ended up turn with bolts on crank pulley to get job done. Back to address the tool shortage. DW doesn't understand that with tools, maintenance and repairs go faster and easier!

 

[BigPapa]

not being able to get barring tool into crank pulley and alternator has a hex key pulley

The barring tool goes into the trans adapter plate and mates to the starter gear on the flexplate or flywheel, not the crank pulley.

The alternator pulley has a nut holding it to the shaft. Use the nut to turn the alternator.

 

[Cummins12V98]

"The alternator pulley has a nut holding it to the shaft. Use the nut to turn the alternator."

YEP, works like a charm.