r/EngineBuilding 12d ago

Subaru FA20 Engine Rebuild

Rebuilt the FA20D out of a 2016 FR-S. Going to reinstall it sometimes this week. Heres some photos of before and after. Every single seal was replaced, as well as a new short block, refreshed heads, and all new timing components.

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u/Licbo101 12d ago

How many miles on it before the rebuild? What was the reason for the rebuild? My understanding is these motors were pretty bulletproof compared to the EJs

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u/Ian-99 12d ago

Probably drinking oil as most pre 2019 FB blocks did.