Join Date: Jun 2016
Location: Sacramento, CA, USA
Rocker arm shimming + head timing
2 questions regarding a head rebuild:
1 - Are shims required in the locations circled in red? According to the service manual it only stresses that the rocker arms be "perfectly centered" to the valve, free movement of arms but no end play.
I have found the opening rockers are mostly evenly spaced to the valves on one side without any shims, and the other side with only 2 shims on the side where the black clip goes in.
2 - How do we correctly time the heads? I have two sets of heads. One is the OEM pair I removed and the other is a modified V2 but same cams. When I removed the OEM heads I ensured all three pulleys were aligned on the dot (vert/horiz/crank).
I was able to replicate the cam timing on V2 heads from the OEM heads by eyesight only, but something tells me that's not a good idea - maybe I am wrong...