Calais L4-151 2.5L VIN U TBI (1989)
Screw fittings on the fuel line pipes utilize O-rings for the fuel feed and return pipes. Two sizes are used and are not interchangeable.
The vapor pipe extends from the fuel pump/gauge assembly to the canister. However, it may not follow the same route as the fuel feed pipe.
Due to the fact that the fuel pipes/hoses are under high pressure on fuel injected systems these systems require special consideration for service.
FUEL LINE O-RINGS
The fuel line O-rings used are made of Viton. They are brown in color. Viton is less affected than rubber by the additives used in many fuels. Therefore,
rubber should not be used.