Fuel Injector Installation

Special Tools 

EN-47632  Cleaning Tool

For equivalent regional tools, refer to Special Tools .

1. Clean the injector sealing surfaces in the cylinder head using EN-47632  cleaning tool (1) in following procedure:
   Fig 1: Cleaning Tool

   Courtesy of GENERAL MOTORS COMPANY
   CAUTION: Refer to EN-47632 Cleaning Tool Rotation Caution .
   1. Use the brush side to loosen the dirt.
   2. Use the sponge side to remove the dirt.
2. Install the 4 injector brackets (2) to the fuel injectors (3).
   Fig 2: Injectors And Fuel Injector Brackets

   Courtesy of GENERAL MOTORS COMPANY
3. Install the 4 NEW seal rings (1).
4. Install the fuel injectors along with the brackets to the cylinder head.
5. Install the 4 washers (2).
   Fig 3: Injector Bracket Bolts And Washers

   Courtesy of GENERAL MOTORS COMPANY
6. Loosely install the 4 injector bracket bolts (1).
7. Install the 4 fuel injection fuel feed pipes (2).
   Fig 4: Fuel Injection Fuel Feed Pipes

   Courtesy of GENERAL MOTORS COMPANY
8. Loosely install the 8 fuel injection fuel feed pipe nuts (1, 3).
9. Tighten 4 fuel injection bolts (1) to 20 N.m (18 lb ft).
   Fig 5: Injector Bracket Bolts And Washers

   Courtesy of GENERAL MOTORS COMPANY
   CAUTION: Refer to Fastener Caution .
10. Tighten the 4 fuel injection fuel feed pipe nuts to fuel injectors to 25 N.m (18 lb ft).
11. Tighten the 4 fuel injection fuel feed pipe nuts to fuel rail to 19 N.m (14 lb ft).