Remember back a couple of years ago when we were talking about the "Hemi tick" with the lifters. Now, it's GM's turn... Similarity can be its own downfall.

Beware of lifter failure in Chevy GM engines thanks to DFM or AFM bs, spring drop lifters

Did you find out about the oil pressure? Was it the oil barbell plug?

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Repare eso canbie todo y mis fierer #4 sigue tengo 185  conpresion

Pickup tube o ring might be bad.  That would cause low oil pressure and lifter failer

How much could someone pay for this repair?