ThirdBird

Bought new heads for my stock 454s. Head mfgr says I need to check for proper rod length. So, I bought some appropriately sized "push rod length checker" gizmos. One size for intake and another for exhaust.

Question is, I don't know how to use these things. Do I go by feel as when setting up the valve train? Or, should I be measuring lifts?

Thanks for any help.

Vinny P

If you have never done this check before, the best place for information on how to do it is on CompCams website.

http://www.compcams.com/Technical/Products/Pushrods/

ThirdBird

Thanks for that link Checkmate. Read through it, goog thing I did. However, CompCams was referring to a roller set up, mine is flat tappet hydraulic. I'll have to do some more investigating.

PatriYacht

It basicly works the same way. You want to end up with a small contact pattern centered on the valve tip.

ThirdBird

So, basically as perpendicular as possible (rocker to valve)?

Vinny P

As was said, it doesn't matter what type of rocker arm you are using. The contact pattern should be the same. Just follow the instructions on that link.