I recently acquired a used Chev 235 truck engine. It came with transmission, clutch, generator, starter and manifolds with carburetor, but all the 'accessories' were removed and in boxes. I was told it ran well when pulled. It's been sitting around for several years in a dry barn. At least all the openings were well sealed up and nothing was seized.

It took a while to get it assembled enough for a test run. It ran OK without any major internal engine noise. A compression test showed one cylinder had 75PSI, but the others were in the 135 range. Off came the head to identify a burnt exhaust valve in cylinder 1. The rest of the exhaust valves need a re-grind. The intakes looked perfect.

We pulled the oil pan off for a quick check. Bearings looked perfect. Maybe 0.040 undersize on the mains.

Then the surprises kept coming. Oil pump tube fittings were finger tight. Flywheel bolts were not tight. Camshaft gear was not pressed in tight and there was 1/8" endplay.
Pistons were 0.040" oversize. Some have some mild surface erosion due to pre-ignition? But the rings seemed to have about 0.050" end gap. We're guessing it has 0.030" oversize rings in a 0.040" oversize bore ?

So, it needs new rings and a valve job.

Lately it seems that parts are getting harder to find.

Any suggestions on brands or quality of Piston Rings and Valve seats and guides?

John.

When God gives any man wealth and possessions, and enables him to enjoy them, to accept his lot and be happy in his work�this is a gift of God. He seldom reflects on the days of his life, because God keeps him occupied with gladness of heart. Ecclesiastes 5:19-20