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12,466 Posts
170 is way high. Should be between 130 and 140 new.
Two things cause high compression - heavy carbon buildup, and cam timing advanced a tooth or more. When a mechanic accidentally advanced it a tooth while changing the timing belt, my compression went from 135 to 150.
Two things cause high compression - heavy carbon buildup, and cam timing advanced a tooth or more. When a mechanic accidentally advanced it a tooth while changing the timing belt, my compression went from 135 to 150.
