Fuel Mixer Replacement for Chevrolet Express (CNG) 2002

1. Remove the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .



2. Remove the retaining clamp (2) from the assembly.
3. Separate the fuel mixer housing (1) from the throttle body adapter (3).



4. Remove the fuel mixer retaining bolts (6).
5. Separate the fuel mixer (1) from the throttle body adapter.

1. Install the fuel mixer (1) into the throttle body adapter (2) ensuring that all mounting surfaces are clean.

Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

2. Install the fuel mixer retaining bolts (6).

Tighten
Tighten the fuel mixer retaining bolts to 4 N·m (35 lb in).




3. Attach the fuel mixer housing (1) to the throttle body adapter (3) using the retaining clamp (2).

Tighten
Tighten the clamp to 2 N·m (18 lb in).

4. Install the air cleaner outlet duct. Refer to Air Cleaner Outlet Duct Replacement .