Engine Carnage

[Jerry Clayton]

Expert????? do you want referances??? or can't you guys really see that the use of fitted lash caps that fit the tip of the valve/retainer/keepers will take the valve spring pressure load off the valve stem???if the lash cap doesn't push on the keepers, you are transmitting all the forces of the valve spring compression pressure waves to the groove of the valve/keeper and you will shear them creating havoc---also , on a road race car---more engine damage comes from downshifting than anything else than a poorly designed oil system---one of the main things I enjoyed about karting with my boys was no lub system, no valve train

[Paul F]

Originally Posted by Jerry Clayton

Expert????? do you want referances??? or can't you guys really see that the use of fitted lash caps that fit the tip of the valve/retainer/keepers will take the valve spring pressure load off the valve stem???if the lash cap doesn't push on the keepers, you are transmitting all the forces of the valve spring compression pressure waves to the groove of the valve/keeper and you will shear them creating havoc---also , on a road race car---more engine damage comes from downshifting than anything else than a poorly designed oil system---one of the main things I enjoyed about karting with my boys was no lub system, no valve train

We never did settle this point about lash caps as to whether or not they are to ride on the keeper. The Comp Cams and Crower web sites only say that the lash caps protect the valve stem. They make no statement about clearance away from keepers nor do they say the ride on the keepers. I emailed Comp Cams and got no response after 2 days. Crane Cam says:

Valve Lash Caps

Precision machined from 8620 steel alloy, heat treated and black oxided. Provides a better wear surface and lengthens valve for correct geometry. (Maintain .030" clearance from bottom of lash cap to top of the valve locks)

This indicates that they are there to protect the end of the valve stem and not to ride on the keepers. Any other documented instructions for the use of lash caps is appreciated.