Fuel Injector: Service and Repair
INJECTORREMOVAL AND INSTALLATION
CAUTION: When the fuel injector replacement is performed, use scan tool MB991958 to initialize the learning value.
Pre-removal & Post-installation Operation:
Removal Steps 1-19:
REMOVAL SERVICE POINTS
[[A]] FUEL HIGH-PRESSURE HOSE DISCONNECTION
CAUTION: Do not kink the fuel high-pressure hose as it is made of plastics and will become damaged.
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 degrees to the arrowed direction, and lift the retainer to unlock and disconnect the fuel high-pressure hose.
[[B]] FUEL RAIL AND FUEL INJECTOR ASSEMBLY REMOVAL
CAUTION: Do not drop the injector.
Remove the fuel rail with the injectors attached to it.
INSTALLATION SERVICE POINTS
]]A[[ 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. Turn the injector to the right and left to install to the fuel rail. Be careful not to damage the O-ring. After installing, check that the item turns smoothly.
3. If it dose not turn smoothly, the O-ring may be trapped, remove the item, re-install it into the fuel rail and check again.
]]B[[ FUEL HIGH-PRESSURE HOSE CONNECTION
CAUTION: Do not kink the fuel high-pressure hose as it is made of plastics and will become damaged.
1. Pull up the retainer of fuel high-pressure hose to unlock before installing.
2. Install the fuel high-pressure hose to the fuel rail securely and push the retainer 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.