Originally Posted by Junkman

This may be a case of find another mechanic. He wants to do an engine R&R without proper diagnosis. Also, matter of worth is for customer to decide - not the mechanic. The mechanic's job is to diagnose, lay out alternatives with price, implement per the customer's decision and warranty his work. Those that can't diagnose frequently can't implement correctly and stated warranty becomes meaningless.

Yes, begin with leakdown. Gives more information than compression.