I got just a little over 150,000 on m y truck. Was just wondering if it would help if I get my valves adjusted. Have been noticing my fuel mileage slightly dropping off. And if i do get them adjusted what is the cost I will be looking at to get it done

 

It is a 1 hr job give or take.Shop rate.If you do it set the exhaust at 18 and intake at 8.It will help spool

 

Is that the stock setting for the valves or is that just to help the turbo spool?

 

Will that quiet the chatter down some when I adjust the valves

 

Everywhere I am seein the settings should be 20 on the exhaust and 10 on the intake?

 

Thats cummins recommended spec. Allowable is from .007-.015" on the intake, and .015-.030" on the exhaust. But I've heard of guys running .005" and .015", supposedly helps spool. I'm gonna try those specs one of these days.

 

The noise is your injection pump, not the valves.

 

Injector pump only has 30,000 on it

 

VP's are noisy. I found running bio, or two stroke oil helped cut the noise a fair bit. 1 litre/tank with the two stroke was what I used to run.

 

My valves need adjusting. Is the smaller setting recommended by someone that knows what they're doing, documented their results or is it simply a regurgitation of some long forgotten post?

 

As a general rule I wouldn't set valves to their tightest spec. An overly tight valve will do more damage than a overly loose valve.

 

Rotate the engine to TDC and you can check 1 intake & exhaust, 2 intake, 3 exhaust, 4 intake, 5 exhaust. At BDC you can check 2 exhaust, 3 intake, 4 exhaust, 5 intake, 6 intake & exhaust. Use the timing mark on the injection pump drive gear to verify TDC and BDC. The FSM states that as long as the lash is within tolerance there is nothing to be gained by adjusting them. So, IMHO, check and only adjust the ones that are out of tolerance.

 

Don't forget the cam profile is designed to slow the valve down just before closing, if the lash is too loose the valve is slammed against the seat. Too many of these cycles case the valve head to break or seat damage.

 

When you set the valves, its always on TDC. First set is on #1 compression, second set is on #1 exhaust.

 

True