Rocker Arm help

TurboGLH said

Yeah, I've had my kit for a few years now. replicaracer43 posted about his issues, but the pictures and explanation seemed contradictory (3/4" ball mill, but also too wide).

Can you give a better explanation of what you've seen wrong on the saddles? I need to pull the covers to check valve lash anyways, so I'll check that nuts on my hold down studs at the same time. But if I need to pull a set of rockers to measure something on the heads I will.

Click to expand...

Maybe he misunderstood when I talked to him about it. Yes, they use something along the line of a 3/4" (19mm) end mill, but they step over and make a second pass to get the width, which is all over the place from head to head. The problem is it makes the radius shallow, and leaves a high spot, or stepover cusp, that the shaft can rock back and forth on. Aluminum is soft, so over time the high spot flattens out and the bolt tension relaxes and allows the bolts to loosen. That's when the bad stuff starts happening.