Bentley Continental GT GTC Flying Spur W12 Crankcase Breather Valve Hose Assembly 07C103474Q – Bank 2 PCV Vent

Bentley W12 Bank 2 Crankcase Breather Valve & Hose Assembly – 07C103474Q

Maintain correct crankcase ventilation on the Bentley 6.0 W12 with this complete breather valve and hose assembly identified by OE reference 07C103474Q. This assembly is used on Bank 2 / cylinders 7–12 and combines the vent valve, formed breather hoses, connectors and heat-protection sections into a single replacement unit.

Premium Construction for a High-Heat Engine Bay

The assembly uses oil-resistant flexible hose sections, molded connection ends, a pressure-regulating breather valve and protective thermal sleeving in high-temperature areas. Correct hose geometry is especially important on the tightly packaged W12 because it keeps the vent system routed away from hot and moving components while preserving consistent internal airflow.

What It Does

The crankcase ventilation system manages blow-by gases generated during combustion. The 07C103474Q valve and hose network routes these vapors back toward the intake in a controlled way while regulating crankcase pressure. A healthy system supports stable idle quality, helps reduce unwanted oil vapor escape and prevents excessive pressure from building inside the engine.

• Restores controlled Bank 2 crankcase ventilation.
• Helps eliminate air leaks caused by split or hardened breather hoses.
• Supports stable idle and predictable engine vacuum.
• Reduces the chance of oil seepage associated with excessive crankcase pressure.
• Complete formed-hose layout makes installation cleaner than piecing together aged lines.

Fitment

For Bentley Continental GT, Continental GTC and Flying Spur models equipped with compatible 6.0 W12 engines and OE reference 07C103474Q. This part is the Bank 2 version; the opposite bank uses a different part number.

Replacement Guide

1. Work on a cool engine and remove the upper engine covers.
2. Remove intake ducting or nearby components required for clear access to the Bank 2 breather routing.
3. Photograph the original hose path and connector positions before removal.
4. Release the quick connectors and clamps without twisting nearby plastic fittings.
5. Remove the old valve-and-hose assembly and inspect mating ports for oil sludge or damaged seals.
6. Install the new 07C103474Q assembly in the same routing, ensuring every connector locks fully and the heat shielding remains correctly positioned.
7. Reassemble the intake components, start the engine and check for vacuum leaks, whistling noises or loose connections.

FAQ

What is Bank 2?
On this W12 application, 07C103474Q serves the crankcase ventilation path for cylinders 7–12.

What symptoms point to a worn breather assembly?
Typical signs include rough idle, whistling or hissing, oil smell, oil seepage, abnormal crankcase vacuum and split or oil-softened hoses.

Is this a PCV component?
Yes. It performs the pressure-control and vapor-routing function commonly described as PCV or crankcase ventilation.

Can I replace only a hose section?
Replacing the complete formed assembly renews the valve, connectors and aged hose sections together for a cleaner long-term repair.

How do I confirm the correct side?
Match OE number 07C103474Q; the Bank 1 assembly uses a different reference.