Quote:
Originally Posted by 5851a
Ford has slight over sizes for the interference fit adjusters.
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Quote:
Originally Posted by fordor41
Mummerts says the type without the nut tend to wear out and loosen
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There is (was) an OS REPLACEMENT (.0023 OS) for the self locking thread.
C2AZ 6549-A
You can still find some NOS. They were still available (a few years back check) at FORD TRACTOR DEALERS.
QUALITY AFTERMARKET is available (incl roller tips). It is difficult to obtain correct lash due to rocker arm tip wear and valve stem damage. Too tight will not give enough time for the valve to cool on the seat/possible rough idle. Too loose and everything bangs together. And then there is rocker-shaft/arm wear from lack of oil.