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When using larger diameter valvesprings, it's a smart move to check the clearance between the rocker arm and the retainer. Often, this clearance can get tight. Interference here on just some rockers can be traced to budget rocker studs that are not straight. We've seen studs with 0.030 inch of runout!
Valve Training

When using larger diameter valvesprings, it's a smart move to check the clearance between the rocker arm and the retainer. Often, this clearance can get tight. Interference here on just some rockers can be traced to budget rocker studs that are not straight. We've seen studs with 0.030 inch of runout!  View Related Article

 

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