Fuel Injector: Service and Repair

INJECTOR

REMOVAL AND INSTALLATION


CAUTION: When the fuel injector is replaced, initialize the learned value using scan tool.

Pre-removal And Post-installation Operation:

Removal Steps 1-18 (Part 1):

Removal Steps 1-18 (Part 2):

Required Special Tool:
- MB992106: O-ring Installer

REMOVAL SERVICE POINT

[[A]] FUEL HIGH-PRESSURE HOSE DISCONNECTION







1. Follow the steps below to unlock the fuel high-pressure hose connector.







(1) Insert a flat-tipped screwdriver [6 mm (0.24 inch) wide and 1 mm (0.04inch) thick] into the retainer of the fuel high-pressure hose connector.

CAUTION: When pushing up the retainer of the fuel high-pressure hose connector, pay attention to avoid damage to the retainer.







(2) Turn the flat-tipped screwdriver inserted into the retainer by 90 degrees angle to push up the retainer and unlock the fuel high-pressure hose connector.

2. Remove the fuel high-pressure hose.

INSTALLATION SERVICE POINTS

]]A[[ O-RING INSTALLATION







1. Apply a small amount of new engine oil to the O-ring.
2. While turning the fuel injector to right and left, install the O-ring to the fuel injector with care to avoid damage to the O-ring.

]]B[[ O-RING INSTALLATION

1. Apply a small amount of new engine oil to the O-ring.







2. Using special tool MB992106, install the O-ring onto the fuel injector paying attention to avoid damage to the O-ring.

]]C[[ FUEL INJECTOR ASSEMBLY INSTALLATION

CAUTION: When applying the engine oil, make sure not to allow the engine oil to enter the fuel rail inside.

1. Apply a small amount of new engine oil to the O-ring.







2. Turning the fuel injector assembly to right and left, install it to the fuel rail with care not to damage the O-ring. After the installation, check for its smooth rotation. At this time, check that the projection of the fuel injector assembly is in the center.
3. If the rotation is not smooth, the O-ring may be caught. Remove the fuel injector assembly and check the O-ring for damage. After this, re-insert it to the fuel rail and check for its smooth rotation.

]]D[[ FUEL INJECTOR SUPPORT INSTALLATION







Install the fuel injector support to the fuel injector groove and fuel rail brim, and fix the fuel injector assembly and fuel rail.

]]E[[ FUEL HIGH-PRESSURE HOSE CONNECTION

CAUTION:
- When pushing in the retainer of the fuel high-pressure hose connector, pay attention to avoid damage to the retainer.
- After the installation of the fuel high-pressure hose,slightly pull the fuel high-pressure hose to check that it is connected securely. At this time, also check that there is approximately 1 mm (0.04inch) play.







1. Securely insert the fuel rail stopper into the fuel high-pressure hose connector groove to install the fuel high-pressure hose to the fuel rail.
2. Push in the retainer of the fuel high-pressure hose connector to lock the fuel high-pressure hose and fuel rail.