how often valve lash should be done?

[rparlaman]

How often should valves be adjusted? I was pretty good at getting them done , but i put it of for a while now. I know some first gen do never do it, and some do it right at 24,000 miles. Need some in put guys;



Ron





















1992 CTD 163,000 ) 01 HO Banks Power pack,jacobs e brake 50 gal trans flow,30ft. forest river 5th

 

[steveinaz]

cummins says every 12,000 miles on first gens

 

[Greenleaf]

Mine was done at 169,000 miles.

Engine ran well but I did it. Most (former) owners don't wanna be bothered with it, nor do they know how.



Twasn't off by much. Probably was a waste of time but I now know they can run 169K without one and mine is back to the factory specs.



I have seen the DT466 engine run 100K and be off quite a bit.



Take it for what it's worth.



Scott

 

[Steve Graham]

The valve adjustment is done first time at 24,000 and there after every 48,000 miles or every 2000 engine hours. This is from the Cummins Operation and Maintenance Maunual for B series engines. You could do it every 12K but it's not needed.

Steve

 

[dpuckett]

I do mine about once a year, or around 30K, just because the gaskets seem to start seeping, and need replaced anyway, so why not take a little extra time and do it? Last time I checked Mom's after 50K, they were fine. Just depends on how it runs- if it starts rattling and sucking fuel, gets sluggish, I'd check into it. If it runs and sounds good, leave it.



Daniel

 

[EZGZ]

I agree that ounce it is broke in and the valves seated it doesn't change much. I am anal about maintennace and have made a couple of small adjustments just to be right on, but things seem ok. (140K miles)



If you start playing the Horsepower game and are running high temps it is a whole different game.



More power, more Maintennance.



It is easy to check on the 1st gens on those back cylinders. I don't bother with a barring tool. I just put it in 3rd gear and push the whole truck back to turn the engine over. (another advatage over the automatic ). By the time I am done I am about 6 feet farther down the driveway. I am on my second set of o-rings.