Thread: lost of compression on rebuilt engine, need help

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thanks guys for the input. iam going to check this week. hopefully is my valves not seating.

when you did the leakdown test did you bother to listen around and see where the air was coming from... that can point to your problem a lot faster.... listen to the carb for intake valves, exhaust for exhaust valves, oil fill cap for rings, radiator for head gasket, and other cylinders for cracked cylinder walls.... hopefully that'll confirm that you just need to readjust those valves

Hydraulic camshaft?

It's easy to get the clearances too tight on these.

Pick one of your zero compression cylinders, remove the rockers and pushrods then do a compression test on that cylinder.