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Re: Help finding tapping noise.
One way to locate lifter tick is to slip your friends feeler gauge between valve stem and RA while it's ticking.
Another check is to time how long it takes for all RA to get oil after cold start.
Verify 10 psi per 1000 rpm hot oil pressure.
I would check lifter bore wear on the tickers b4 buying new lifters.
Can disassemble some lifters and check for trash.
Can compare lifter leak down rates on the bench.
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