Firebird V8-350 5.7L VIN P SFI (1996)
Fuel Return Line: Service and Repair
Fuel and EVAP Pipe Repair
When repairing the fuel or EVAP pipes with hoses, always replace them with original equipment or parts meeting GM specifications. Use only
reinforced fuel resistant hose which is identified with the word Fluoroelastomer or GM 5163-M on the hose. The inside hose diameter must match
the outside pipe diameter.
Do Not use rubber hose within 100 mm (4 in) of any part of the exhaust system or within 254 mm (10 in) of the catalytic converter.
A minimum of 13 mm (1/2 in) clearance must be maintained around sharp edges such as flanges, pinch welds, etc., in order to prevent contact and
chafing. A minimum of 19 mm (3/4 in) clearance must be maintained around all moving parts.
Cut the ends of the pipe remaining on the car square with a tube cutter. Using the first step of a double flaring tool, form a bead on the end of both
pipe sections. If the pipe is too corroded to withstand the beading operation without damage, the pipe should be replaced. If a new section of pipe
is used, form a bead on both ends of the pipe also.
Use screw type hose clamps. Slide the clamps onto the pipe and push the hose 51 mm (2 in) onto each portion of the fuel pipe.
If more than a 6 inch length of pipe is removed, use a combination of steel pipe and hose so that the total hose lengths, including the 100 mm (4
in) additional length will not be more than 254 mm (10 in) long. Follow the same routing as the original pipe.
