Originally Posted by kink04fxd
The idea is to get the pushrod in the middle of the lifter. Hope the link works.
The process is to get the tappet sitting on the base circle of the cam, and to adjust it to the desired depth in the tappet.
OEM sets them at .100", which is in the moddle of the tappet bore of .200" in OEM tappets.
Most engine builders and mechanics run them at .140"-.150" depth.
Hydraulic pushrod adjustment
SE pushrods are generally 24 TPI (Threads per inch). BUT, you need to determine that. (Count the threads in once inch of length)
32tpi = 3.2 turns to .100" (.03125" per turn/.00520 per flat)
30tpi = 3.0 turns to .100" (.03333" per turn/.00555 per flat)
28tpi = 2.8 turns to .100" (.03571" per turn/.00595 per flat)
24tpi= 2.4 turns to .100" (.04165" per turn/.00694 per flat)
If 24tpi= 2.4 turns to .100" (.04165" per turn/.00694 per flat)
.04165 x 3.5 total turns = .145" depth.
I ran 24 tpi SE pushrods, set at 3.6 turns = .1499 tappet depth.
is to either start from scratch and back them off and start from new...... or to trust the mechanic and assume he set them at 2.5 turns as per the SE's instructions, and go another complete turn on each one.
Personally........I'd start from scratch.