Firebird V6-3.8L VIN K (1995)
Fuel Return Line: Service and Repair
Chassis Fuel Feed / Return Pipes
Chassis Fuel and Vapor Pipes
NOTE:
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When replacing fuel or EVAP pipes, always replace them with original equipment or parts that meet the GM specifications for those parts. The
replacement pipes must have the same type of fittings as the original pipes to ensure the integrity of the connection.
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Do not use copper or aluminum tubing to replace steel tubing. Only tubing meeting the 124-M specification or its equivalent is capable of meeting
all pressure, corrosion and vibration characteristics necessary to ensure the durability standard required.
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When repairing 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 "Fluornelastomer" or "GM 6163-M" on the hose. Inside hose diameter must match
outside pipe diameter.
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Do not use rubber hose within 100 mm (4 inchs) of any part of the exhaust system or within 254 mm (10 inch) of the catalytic converter.
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A minimum of 13 mm (1/2 inch) clearance must be maintained around sharp edges such as flanges, pinch welds, etc., to prevent contact and
chaffing. A minimum of 19 mm (3/4 inch) clearance must be maintained around all moving parts.
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If more than a 200 mm (6 inchs) length of pipe is removed, use a combination of steel pipe and hose so that the total hose lengths, including the
100mm (4 inchs) additional length will not be more than 254 mm (10 inchs) long. Follow the same routing as the original pipe.
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Cut ends of pipe remaining on car square with a tube cutter. Using the first step of a double flaring tool, form a head on the end of both pipe
sections. If 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 it also.
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Use screw type hose clamps. Slide clamps onto pipe and push hose 51 mm (2 inchs) onto each portion of fuel pipe.
REMOVE OR DISCONNECT
1. Negative battery cable.
2. Relieve fuel system pressure.
Clean
Clean all fuel and EVAP pipe/hose connections and surrounding areas before disconnecting to avoid possible contamination of the fuel system.
3. Raise vehicle.
4. Engine compartment connecting fuel feed, return, and EVAP pipe assemblies from chassis fuel pipes.
5. Fuel feed pipe from outlet side of in-line fuel filter.
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Discard 0-ring.
6. Fuel return and EVAP pipes from rear fuel pipes.
7. Fuel pipes and attaching hardware from under body.
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Note position of fuel pipes for installation.
Inspect
Pipes for bends, kinks and cracks. Repair or replace pipes as required.
