Reply to "Rocker stud got loose, again"

bosswrenchMember

You don't really say what came loose- lash or the threads into the head. So, two suggestions: with roller rockers, the polylock nut MUST be tightened against the flat part of the pivot shaft. If you tighten against the rounded surface, the nut will indent the round shaft and will quickly increase lash. I've seen this happen in 50 road miles.
Second- by using a stud girdle on the rocker studs, not only will valve lash stay as-set, but the stud will be physically restrained. I've seen cracked rocker studs in a running engine and the driver didn't know it until the engine was torn down for some other reason. Jo-Mar makes a nice girdle assembly which fits the 351-C and also fits inside inside the usual aluminum rocker covers. They work with both hydraulic and solid lifters.

10/25/153:59 PM

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