I am going to the Cummins house in a week or two so I can have my valves adjusted. Is there one way better than another to have the valves set so that it runs better and/or cooler? Thanks.

 

IIRC, set them up a little on the tight side. You do know the valves don't need to be done until 150,000 or so miles.

 

Well I am almost to 121K and with the way this truck has run since I bought it, I figure it could probably use it.

 

Blue didn't you adjust your valves at 90,000?????????

 

Nope. We spent all day working on your heap.

 

How you liking the 1.5's? Did you get them in yet?

 

touche' my friend.....Matt I'm going to put them in this weekend. Last weekend we went fishing Sat. morning, however; the trip turned into a weekend long trip because you can't quit when your catching fish right??

 

I set my valves at 7 intake and 17 exhaust. Cummins says 10 intake and 20 exhaust plus or minus 5.

 

What will this or setting them tight do?

 

Tighter valve clearance settings take more advantage of the cams' lift and duration. In the case of the cummins (especially the older 12vers) the cam is extremely lame, so we try to get every last bit out of that profile by setting the valves tight. Too tight and the valves will not close completely once hot. Best case scenario is the engine will lose compression, but valves will start kissing pistons as well!

 

What settings do you recommend for an 02 HO?

 

I would set it to stock Cummins specs.