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Old 11-04-2019, 08:30 PM   #6
Scooby Specialist
Member#: 220971
Join Date: Aug 2009
Chapter/Region: South East
Location: NC
2004 Impreza


Replace only the valves needed, and it will keep costs in check, otherwise you'll fall down the rabbit hole of "while I'm here".

Most machine shops do this test with Red ATF to see the dye trace.

If the valves hit hard enough, besides bore score, the issue is the person working on the engine, you start getting into piston size, ring gap, on top of engine condition.

Unless you're dealing with a known Surbau engine builder with lots of engines back on the road after repairs; you would be much further ahead, to just buy a used US or JDM long block and swap it in.
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Blktrax is offline   Reply With Quote