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Re: Lifter clacking
Alot of solid cams have a coating on them that wears off during break in. After this coating is gone and as the parts wear together the lash will increase so it is common to reset lash not to long after run in. Rocker nuts have a pinched thread that Is basically like using a nylok fastner so it doesn't come loose. If the rocker nuts are used its possible that the threads have distorted and need replaced with a new one. On a hydraulic cam the nut would be suspect since the lifter takes account for wear. Another possability is a stud pulling loose from the head. Its pretty easy to look at rhe rocker arm and stud heights and see a problem forming. Pay attention to the valve keepers also.
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