FUEL VACUUM VALVE DIAPHRAGM
- Rolls-Royce Silver Shadow (chassis 01001-12441), Silver Shadow (2-Door, chassis 1067-12402), Corniche (chassis 09770-12402)
- Bentley T1 (chassis 01001-12441)
This is the diaphragm for the Vacuum Valve located next to the B-Bank (left hand) carburetor. The internal diaphragm has been discontinued by the factory for many years, but reintroduced via the Prestige Parts range from October 2023.
It has commonly degraded due to age, preventing the fast idle setting working correctly. The Vacuum Valve is fitted to cars equipped with refridgeration from chassis 01001-05603 and all cars from 06001-12441. It is operated by a solenoid, which in turn operates the fast idle via the B-Bank throttle lever.
The Prestige Parts diaphragm has been manufactured from certified Viton B grade material, resistant to ethanol at all levels.
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