Sable V6-183 3.0L DOHC VIN S MFI (1997)
Liquid Vapor Separator: Description and Operation
Evaporative Emission Components
DESCRIPTION
The evaporative emission valve performs its function within the Evaporative Emissions (EVAP) system as follows:
-
The evaporative emission valve is mounted in a rubber grommet at a central location in the upper surface of the fuel tank.
-
The evaporative emission valve uses a small orifice and shut off valve to allow only fuel vapor to pass into the evaporative emission hose and onto
the evaporative emissions canister (EVAP canister).
-
A vapor space between the fuel level and the fuel tank upper surface is combined with an orifice and float shut-off valve in the evaporative
emission valve to prevent liquid fuel from passing to the evaporative emission tube shut off valve and the evaporative emissions canister.
-
The vapor space also allows for thermal expansion of the fuel.
NOTE: Vehicles equipped with a 68 liter (18 gallon) fuel tank require the use of two evaporative emission valves. Vehicles equipped with a 61
liter (16 gallon) fuel tank use only one evaporative emission valve.
