Fuel Injector Replacement LLT
Special Tools
• | EN-47909 Injector Bore and Sleeve Cleaning Kit
|
• | EN-48266 Injector Seal Installer and Sizer
|
• | J-37281-A Injector Remover
|
• | J 39313 Spark Plug Port Adapter
|
Removal Procedure
- Relieve the high side fuel system pressure. Refer to
Fuel Pressure Relief.
Note: The fuel injectors have an alignment feature, note the position of the injectors alignment for installation.
- Remove the fuel injection fuel rail assembly. Refer to
Fuel Injection Fuel Rail Assembly Replacement - Bank 1 or
Fuel Injection Fuel Rail Assembly Replacement - Bank 2.
- Remove and discard the three fuel injector retaining rings (1).
- Remove the direct fuel injectors and harness (1) as an assembly, and disconnect the electrical connector (2). If necessary,
use the
J 2619-01 slide hammer
with the
J-37281-A injector remover
in order to remove the direct fuel injectors
evenly.
- Remove and discard the following components from the fuel injectors (4).
- Inspect the fuel rail injector bores and clean with the
J-39313 adapter
, and
EN-47909 cleaning kit
, if required.
Installation Procedure
Note: Lubricate a NEW O-ring seal (1) with silicon free engine oil GM P/N 12345610 (Canadian P/N 993193) or equivalent.
- Install the following NEW components to the fuel injectors. Use steps 2 through 8 to install these components.
- From the
EN-48266 Installer
, position
the EN 48266-1 to the injector tip.
Note: DO NOT lubricate the NEW teflon seal.
- Install a NEW teflon seal onto the EN 48266-1.
- Pull the NEW teflon seal by hand over the EN 48266-1 and into the groove in the injector.
- Remove the EN 48266-1 from the injector tip.
- From the
EN-48266 Installer
, install
the EN 48266-2 to the injector tip.
- Using the EN 48266-2, resize the teflon seal. Install the EN 48266-2, until it
bottoms out against the injector body, and rotate the EN 48266-2 while applying only moderate force 180 degrees in one direction and then 180 degrees back in the other direction.
- Remove the EN 48266-2.
- Install the direct fuel injectors and harness (1) as an assembly and connect the electrical connector (2).
Note: The fuel injectors have an alignment feature and must be reinstalled as noted during removal.
- Install the fuel injection fuel rail assembly. Refer to
Fuel Injection Fuel Rail Assembly Replacement - Bank 1 or
Fuel Injection Fuel Rail Assembly Replacement - Bank 2.