The Stovebolt Site Forums The Shop Area General Truck Talk effects of slightly loose valve adjustment

Rusty Rod,

I don't think it is critical. Once the lifter is pumped up, it in essence becomes a "solid hydraulic lifter". I think the recommended adjustment positions the piston in the center of the travel inside the lifter proper, and this is what the engineers want. As long as it is close...not bottomed out and not clacking, you are OK.

This is my understanding of it, but I might be OTL.

Stuart