Shimming rockers?

Myke86GT said:

What ever rockers you are setting, be sure the valves are closed. Bolt the rocker down to zero lash. To do that tighten the bolt down until the pushrod stops moving up & down and has a slight drag when spinning. Once you get zero lash, torque the bolt to specs.( want to say 15-20ftlbs) It should tighten to specs with in 1/4 to 1 full turn of the bolt. If it goes more than a full turn then that rocker will need a shim. Repeat for remaing rockers.

The shim will go between the rocker base and the U channels it sits in.....

You can get a shim kit form Summit or a locall speed shop. Crane and FMS makes them. They come in a kit with different thickness, and start with the thinnest 1st and go to next thickness if needed. There are only 2 or 3 thicknesses, I can't remembr exactly, been a while since I had bolt down rockers.

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xherdlr said:

What do you mean by "tightening to spec?" I followed a simular pattern...got zero lash and continued turning until valve almost closed. Then tighted 3/4 turn... My rockers are still a little loose. Are they OK or do I need to add Shimms? The sequence I used is what someone sent to me from Ed Curtis....

Kelly

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