Thread: ? needing to re-ring one piston

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Don't be so sure it's the ring's in that Cylinder . More times then not its a valve not seating well . This is why I hand Lap all my valves to the seats . Did you try some oil in that cylinder and then Do the C/R Test ?

did do a leakdowm test with 100psi of air on a warm motor, tdc, was blowing into the oil pan. tore the block down, piston had oil on it, every thing on piston "look's" o.k.??? putting new rings on it, honed the cylinder. will post back afther firing it back up. has anyone ever heard of one piston not seating afther a rebuild???