Blazer 4WD V6-4.3L VIN X (2005)
Fuel Return Line: Service and Repair
Fuel Hose/Pipes Assembly Replacement (Fuel Pipe Repair)
FUEL HOSE/PIPES ASSEMBLY REPLACEMENT (FUEL PIPE REPAIR)
Steel fuel lines-These are welded steel tubes, meeting GM specifications 124-M, or the equivalent. The fuel feed line is 9.5 mm (3/8 inches) diameter
and the fuel return line is 8 mm (5/16 inches) diameter. Do not use copper or aluminum tubing to replace steel tubing. Those materials do not have
satisfactory durability to withstand normal vehicle vibration.
Coupled hose-Do not repair the hoses. Replace them only as an assembly.
Uncoupled hose-Use only reinforced fuel resistant hose, made of Fluoroelastomer material. Do not use a hose within 100 mm (4 in) of any part of the
exhaust system, or within 2154 mm (10 in) of the catalytic converter. The hoses inside diameter must match the outside diameter of the steel tubing.
Clamps-These are stainless steel, screw bank-type clamps, #2494772, or equivalent.
Steel Fuel Line Repair
1. Cut a piece of fuel hose 100 mm (4 in) longer than the section of line to be removed. If you remove more than 152 mm (6 in), use a combination
of steel pipe and hose. The hose length should not be more than 2154 mm (10 in) total.
2. With a tube cutter, cut a section of the pipe to replace. Use the first step on the reamer to form a bead on the ends of the pipe and, also, on the new
section of pipe, if used.
3. Slide the hose clamps onto the pipe and push the hose 51 mm (2 in) onto each portion of the fuel pipe. Tighten a clamp on each side of the repair.
4. Secure fuel line to the frame.
5. Check for leaks.
