They should stay down on the head, seat them all the way down. If they ride up and down on the valve stem then they're not really doing any good. Should have some type of metal spring, clamp around them to hold them to the block. I hear the blue Viton seals are good. That was from a machinist that works mostly on Chevy big blocks. Some seals work too good and don't allow any oil past them. Need some oil to lubricate the guides and stems just not too much. I'm sure there are other good seals.
__________________
Hank
70 Chevelle SS396(454), M20, 3.73
My Chevelle
|
06-27-2013, 02:02 PM
Threaded Mode