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I had the same thing this year with a 2.2 long block I purchased, leak down was also 50 psi on all cylinders. Finally with PMO and Ignition ran it on test stand for 20 min plus to break-in cams and rocker and all but one cylinder came up to only 4 percent leakage. I'm not worried about the sixth, needs to be in car and have some load applied to set the rings. Best, Mark
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1974, 914-6 GT Tribute
2007 Cayman S
1998 993 Carrera S, speed yellow (Yellow Bird) gone but not forgotten.
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