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Old 11-22-2017, 12:26 AM   #3
IanT-EJ22
Scooby Newbie
 
Member#: 477892
Join Date: Nov 2017
Chapter/Region: NESIC
Location: Waterbury Center, Vermont
Vehicle:
2000 Impreza Wagon
Silver

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Could be a slightly bent valve. Even though the seats look ok, it takes a perfectly straight valve with a perfect valve face-to-stem transition for the valve to seal correctly.

Did the compression gauge read anything at all during the test? 0 is low lol Either the valves in that cyl were bent, the rings were shot, you have a massive hole in the piston (which you said you didn't) or your timing belt jumped on that cam and the valves were timed incorrectly.
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