A few years back (about 5) I blew the motor in my father's '67 Continental Convertible. He had the 462 and the tranny rebuilt, and the car has sat with the motor out since that time. I thought the least I could do is put the thing back together for him, but the job has been more than I bargained for. After several set backs; clanky lifters, a leaky front crankshaft seal and an overheating problem, I thought I was almost done when we attacked a problem with the air conditioning. The air would work, but the diverter doors didn't direct the air properly. Armed with the factory service manual the restoration shop checked the vacuum. Low and behold the engine only makes 12lbs of vacuum when 18 is required to work all the accessories properly. Once again consulting the manual, we checked the the engine's compression, and every hole is low! All eight cylinders only make in between 105 and 110 lbs, the manual says I should be making 150. We tested the rings, and believe the problem is with the valves. Or... I remember reading on this forum that when a engine rebuilder not familiar with the MEL puts replacement pistons in an engine, often factory compression ratios are not maintained. The rebuilder is blaming sticking valves due to the length the motor sat uninstalled. I am wondering why EVERY hole would have low compression. Is it possible that all the valves are sticking?
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