Tools Required

J 45910 Fuel Injector Sleeve Remover/Installer

1. Drain the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.
2. Remove the fuel injector(s). Refer to Fuel Injector Replacement in Engine Controls - 6.6L.
3. Install J 45910 into the fuel injector sleeve.



4. Tighten the nut while holding J 45910 .



5. Install J 45910-2 over J 45910-1, which are both part of kit J 45910 , and add the washer and nut.



6. Hold J 45910 while turning the nut to remove the fuel injector sleeve.



7. Remove J 45910 with the fuel injector sleeve.



8. Remove the O-rings (1).

Important: Inspect the seating surface on the fuel injector sleeve and the fuel injector sleeve bore in the cylinder head for debris or damage. If the injector sleeve bore is damaged, the cylinder head may need to be replaced.

1. Clean the fuel injector sleeve lower sealing area (1) and the sleeve bore with GM P/N 12377981, (Canadian P/N 10953463), or equivalent.



2. Lubricate and install NEW O-rings (1) onto the fuel injector sleeve (2).



3. Install the fuel injector sleeve onto J 45910 .



4. Apply adhesive GM P/N 12345493, (Canadian P/N 10953488), or equivalent to the fuel injector sleeve lower sealing area (1).



5. Install the fuel injector sleeve with J 45910 into the cylinder head.



6. Lightly tap on J 45910 with a hammer to install and seat the fuel injector sleeve.
7. Remove J 45910 from the fuel injector sleeve.
8. Install the fuel injector(s). Refer to Fuel Injector Replacement in Engine Controls - 6.6L.
9. Fill the cooling system. Refer to Cooling System Draining and Filling in Engine Cooling.