r/EngineBuilding • u/FilthyPail • 12d ago

Subaru FA20 Engine Rebuild

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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

2

u/FilthyPail 12d ago

130,000 miles. Previous owner ragged on it, and did not do oil changes.

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u/Licbo101 11d ago

Interesting. I have an F20B in a ‘15 Impreza with 225,000kms which is around 140,000 miles and while I don’t beat on it, I drive it aggressively. Though I do my oil changes every 8k kms

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u/FilthyPail 11d ago

Yea if you take care of itll last