What is the purpose of the roll-over valves and how can they be removed and installed on Ford Focus?

The roll-over valves are located in rubber grommets in the top of the fuel tank, with hoses leading rearwards to the carbon canister. Their purpose is to prevent fuel loss if the vehicle becomes inverted in a crash. To remove the roll-over valve, start by removing the fuel tank and releasing the vent hose from the clip on the top of the tank. Carefully pry the roll-over valve from the rubber grommet and remove it along with the hose. Make sure to check the condition of the rubber grommet and replace it if necessary. For installation, simply reverse the removal steps and apply a light smear of clean engine oil to the rubber grommet to ease the installation process.

Genuine Ford Focus Fuel Tank Vent Valve

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2 Fuel Tank Vent Valves found

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Ford Focus Valve Assembly - Fuel Vapour
Part Number: 3S4Z-9B593-AA
$15.57 MSRP: $21.27
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Product Specifications
- Other Name: Valve Assy - Fuel Vapour
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2004-2007 Ford Focus | 4 Cyl 2.3L | 4-Speed Automatic Transaxle - 4F27E, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive
View related parts
Ford Focus Valve Assembly - Fuel Vapour
Part Number: F8RZ-9B593-BA
Product Specifications
- Other Name: Valve Assy - Fuel Vapour; Fuel Tank Vent Valve, Vapor Valve
- Warranty: This genuine part is guaranteed by Ford's factory warranty.
Fits the following Vehicles:
- 2000-2007 Ford Focus | 4 Cyl 2.0L, 4 Cyl 2.0L CVH EFI, 4 Cyl 2.0L Zetec EFI, 4 Cyl 2.0L Zetec VVT, 4 Cyl 2.3L | 4AT 4F27E, 4-Speed Automatic Transaxle - 4F27E, 5MT, 5-Speed Manual Transmission - B5/IB5, 5-Speed Manual Transmission - MTX75, 6MT, 6-Speed Manual Transmission, Front-Wheel Drive (Left Hand Drive), Left Hand Drive

Ford Focus Fuel Tank Vent Valve

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Ford Focus Fuel Tank Vent Valve Parts Questions & Experts Answers

Valve Assembly - Fuel Vapour
3S4Z-9B593-AA
Q: What is the purpose of the roll-over valves and how can they be removed and installed on Ford Focus?
A: The roll-over valves are located in rubber grommets in the top of the Fuel Tank, with hoses leading rearwards to the carbon canister. Their purpose is to prevent fuel loss if the vehicle becomes inverted in a crash. To remove the roll-over valve, start by removing the fuel tank and releasing the vent hose from the clip on the top of the tank. Carefully pry the roll-over valve from the rubber grommet and remove it along with the hose. Make sure to check the condition of the rubber grommet and replace it if necessary. For installation, simply reverse the removal steps and apply a light smear of clean engine oil to the rubber grommet to ease the installation process.