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Repaired engine exhibiting the same symptoms after the repair

Nightflyr *
Richard Kirshy

When I was going the leak down, initially there was compression leakage into the next piston, and into the intake manifold. This slowly disappeared as the air pressure slowly built up to 120psi. It did this on about 3 cylinders.
That ain’t right…
You either have some sticky valves that are sealing under pressure , improper head gasket fitment, block deck or head have a low spot.