Sable V6-3.0L VIN U (1999)
Liquid Vapor Separator: Description and Operation
NOTE: Vehicles equipped with a 68 liter (18 gallon), non-ORVR fuel tank require the use of two evaporative emission valves. Vehicles equipped with
a 61 liter (16 gallon), ORVR fuel tank use only one fuel tank mounted fuel vapor control valve and one fuel vapor vent valve.
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The fuel vapor vent valve is mounted in a rubber grommet or serviced as a fuel vapor control valve assembly on the upper surface of the fuel tank.
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The fuel vapor vent valve uses a small orifice and shut off valve to allow only fuel vapors to pass into the evaporative canister tube and into the
evaporative emissions canister (EVAP Canister).
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Is serviced as an assembly with the fuel vapor control valve.
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A vapor space between the fuel level and the fuel tank upper surface must be maintained.
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The vapor space allows for thermal expansion of the fuel.
