Engine/Transmission (1998.5 - 2002) Need to know valve specs

[trqmnstr]

Hey guys, I'm going to adjust my valves in the next few days and I need to know the specs. Thanks a lot.

 

[rattlnrench]

I believe you'll find them on the spec. plate located on the timing cover of the engine.

 

[Jetpilot]

0. 010 Intake

0. 020 Exhaust



The cummins limit is 0. 006 min to 0. 015 max on the intake and 0. 015 min to 0. 030 max on the exhaust.



Doug

 

[trqmnstr]

Hey, thanks for the info.

 

[Vaughn MacKenzie]

I always do mine to . 008" and . 018". Get a bit more lift that way and still have a little margin of safety.



Vaughn

 

[moparguy]

Vaughn, I'm glad to see someone else take a different road. I used to always do 10/20, but the last couple of times I've used 6&16. If I recall, that's the min. that Cummins specs on our engines. It's not as noisy and it should produce a bit more power on the top end.



I do check and adjust every 20k or so. Don't want anything to tighten up and damage a valve (or worse).



RJR

 

[SHobbs]

I normally set the intake at . 011 and the exhaust at . 022. Kind of the middle of the road. I know it is said every 100k but I check mine every 50k and adjust if needed.