Your FA20 turbo engine relies on a small but critical component: the Positive Crankcase Ventilation (PCV) system. When it fails, oil vapours and carbon build-up quietly rob your Subaru of performance, reliability, and efficiency.
The good news? With the right parts and maintenance, this problem is fixable.
The Problem: PCV Failure & Carbon Build-Up
The FA20 turbo uses direct injection, which means less fuel wash over intake ports. Combine that with a stressed PCV valve, and you end up with oil vapour and sludge clogging the intake path.
Common symptoms include:
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Rough idle or hesitation
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Oil film inside hoses and intercooler
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Whistling or hissing vacuum leaks
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Higher oil consumption
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Black smoke or fumes
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Inconsistent boost or throttle response
Left unchecked, these issues lead to leaks, poor drivability, and reduced engine life.
Why It Happens
| Cause | Effect |
|---|---|
| Oil blow-by | Vapour deposits inside intake tract |
| Valve sticking or diaphragm failure | Crankcase pressure, oil leaks |
| Hose degradation | Vacuum leaks, poor routing |
| Carbon deposition | Choked airflow, reduced performance |
| Lack of maintenance | PCV overlooked in service schedules |
The Roo Racing Solution: A Complete PCV Bundle
Other markets have tried partial fixes — in the US and Canada, the PCV valve is listed as a replacement service item. In Australia, Subaru pushes its Upper Engine Cleaner for carbon removal.
At Roo Racing, we’ve combined both approaches into one complete kit:
What’s inside:
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Upper Engine Cleaner – dissolves oil sludge and carbon deposits
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New PCV Valve – replaces the failing original part
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Alloy PCV Connector – strong, heat-rated, and leak-free
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New Genuine PCV Hose Kit - change them out while you're there.
This combo does more than replace parts it cleans, restores, and prevents future issues in a single job.
Why Roo Racing?
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Bundled solution — not just a single part
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Quality components: genuine cleaner + durable alloy connector
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Designed by Subaru enthusiasts, for Subaru enthusiasts
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Prevents future failures and restores peace of mind
Don’t let PCV sludge and carbon build-up quietly destroy your FA20’s performance. Roo Racing’s FA20 PCV Bundle gives you everything you need to fix it once and for all.
⚡ Cleaner intake. Stronger parts. Restored response.