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Old 01-22-2019, 03:17 PM   #2
Scooby Newbie
Member#: 450300
Join Date: Jul 2016
Location: DFW, Texas
1993 GC8 WRX


I've seen that on a couple engines before. Both times it was valve related.

As you stated, you'll need to pull the head out and have a good look around, but my instinct would be that your bottom end is fine, and you may need a new valve or two and accompaniments. Seems that you're on the right path. Keep heading that way and let us know what you find.
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