Express 3500 V8-6.6L DSL Turbo (2008)
11. Install J-46594 into the bolt hole in the fuel injector bracket.
12. Install a flare nut wrench onto J-46594 and pull back away from the fuel injector, until the injector releases from its seat.
13. Remove J-46594.
14. Remove the fuel injectors with brackets.
15. Remove and discard the copper washer from the fuel injector bore.
16. Remove and discard the fuel injector O-ring from the injector.
Fuel Injector Cleaning and Inspection
Important: If reusing the old injectors perform the following:
1. Use a soft bristle non-metallic brush and Top Engine Cleaner, GM P/N 1052626 or equivalent, to remove any deposits from the nozzle tip (1) and
the copper washer sealing area (2) before re-installation.
2. Inspect the fuel injector nozzle tip (1) for any signs of discoloration (dark yellow, tan or blue) due to excessive heat.
3. Replace the injector if any damage is found.
