Fuel Injector: Service and Repair
INJECTORPre-removal Operation And Post-installation Operation:
Removal Steps 1 - 22:
REMOVAL AND INSTALLATION
Required Special Tool:
MB992106: O-ring installer
REMOVAL SERVICE POINTS
<> FUEL HIGH-PRESSURE HOSE DISCONNECTION
CAUTION: Do not kink the fuel high-pressure hose as it is made of plastics.
1. Insert a flat-tipped screwdriver [width 6 mm (0.24 inch), thickness 1 mm (0.04 inch)] to the retainer.
2. Turn the flat-tipped screwdriver approximately 90° to the arrowed direction, and lift the retainer to unlock and disconnect the fuel high-pressure hose.
<> FUEL RAIL AND INJECTOR ASSEMBLY REMOVAL
CAUTION: Do not drop the fuel injector.
Remove the fuel rail with the fuel injectors attached to it.
INSTALLATION SERVICE POINTS
>>A<< O-RING INSTALLATION
1. Apply a drop 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 a caution not to damage the O-ring.
>>B<< O-RING INSTALLATION
1. Apply a drop of new engine oil to the O-ring.
2. Using the special tool MB992106, install the O-ring to the fuel injector without damaging the O-ring.
>>C<< FUEL INJECTOR ASSEMBLY INSTALLATION
CAUTION: Do not let the engine oil get into the fuel rail.
1. Apply a drop 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 a caution not to damage the O-ring. After the mounting, 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. Then, reinsert 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 flange, and fix the fuel injector assembly and fuel rail.
>>E<< FUEL HIGH-PRESURE HOSE CONNECTION
1. Pull up the lock of fuel high-pressure hose to unlock before installing.
2. Install the fuel high-pressure hose to the fuel rail securely and push the lock of fuel high-pressure hose downward and lock thoroughly.
3. After installing, slightly pull the fuel high-pressure hose and ensure that there is no disengaged fuel high-pressure hose. Also confirm that there is approximately 1 mm (0.04 inch) play at this time.