Engine Oil Filler / Breather Cap: Service and Repair
WM 171519 Removing and installing oil filler neck
Technical values
Preliminary work
1. Disconnect negative terminal of the battery.
2. Remove engine compartment lid.
-> 557819 Removing and installing engine compartment lid 557819 Removing and Installing Engine Compartment Lid.
CAUTION
Hot components
- Risk of burns
-> Let hot components cool down.
-> Wear personal protective gear.
3. Remove resonance tube.
-> 247419 Removing and installing resonance tube Service and Repair.
4. Detach B+ line at the starter.
-> 276019 Removing and installing starter .
Removing oil filler neck
1. Loosen the spring band clamp -1- on the connecting hose to the service tray.
1.1. Place cleaning cloths underneath to catch any residual oil as required.
1.2. Pull hose -2- off the oil filler neck.
Connecting hose between service tray and oil filler pipe
2. Unclip plastic holder -2- on the oil filler neck -1-.
Installation position of oil filler neck and plastic holder
3. Loosen oil filler neck mounting on the crankcase.
3.1. Release and pull off positive crankcase ventilation line -1- at the adapter -2-.
3.2. Check O-ring and replace if necessary.
4. Unscrew two external Torx screws (E10, M6 x 20) -3-.
Mounting and ventilation
5. Unscrew external Torx screw (E10, M6 x 16) -2- used to secure the cable duct to the intake-air distributor for cylinder bank 1-3.
5.1. Pull the cable duct -1- carefully to the rear.
Wire harness mounting, cylinder bank 1-3
6. Unscrew external Torx screw (E10, M6 x 12) -1- used to secure the oil filler neck holder -2- under the intake-air distributor for cylinder bank 1-3.
Threaded joint at oil filler neck
6.1. Tool recommendation for difficult-to-reach joint:1/4-inch change-over ratchet -1- with short extension and socket-wrench insert (E10) -2-.
Tool recommendation
7. Open the holder for air-conditioning lines at the intake-air distributor for cylinder bank 1-3.
7.1. The metal holder remains on the intake-air distributor for cylinder bank 1-3 and must not be removed.
7.2. Unscrew fastening nut -1-.
7.3. Open the holder -2- and remove the rubber sleeve -3-.
Loosening holder for refrigerant lines
Information
Cover engine openings (intake openings, crankcase, oil lines, open reservoirs) with a cloth or adhesive tape to prevent dirt and foreign bodies from falling into the openings.
8. Press the refrigerant lines forward slightly and remove the oil filler neck by lifting it upwards.
8.1. Cover or mask the opening on the crankcase.
9. Replace O-ring on oil filler neck.
10. Clean connection points and sealing surfaces.
Installing oil filler neck
1. Remove cover from crankcase opening.
1.1. Grease new O-ring on the oil filler neck lightly with Kluber Syntheso Glep.
2. Press the refrigerant line forward slightly and guide the oil filler neck into position from above.
2.1. Fit oil filler neck on the crankcase and position in at the holder.
3. Pull the cable duct carefully to the rear.
4. Fit external Torx screw (E10, M6 x 12) -1- on the oil filler neck holder.
Threaded joint at oil filler neck
4.1. Tighten screw using 1/4-inch change-over ratchet -2- with short extension and socket-wrench insert (E10) -1-.
Tools
=> Tightening torque: 13 Nm (9.5 ftlb.)
5. Secure oil filler neck on the crankcase.
5.1. Fit and tighten two external Torx screws (E10, M6 x 20) -3-.
=> Tightening torque: 13 Nm (9.5 ftlb.)
5.2. Fit positive crankcase ventilation line -1- at the adapter -2-.
Oil filler neck mounting and positive crankcase ventilation connection
6. Unclip plastic holder -2- on the oil filler neck -1-.
Installation position of oil filler neck and plastic holder
7. Fit connecting hose -2- to service tray.
7.1. Position and close spring band clamp -1-.
Connecting hose between service tray and oil filler pipe
8. Position cable duct -1- on intake-air distributor for cylinder bank 1-3.
8.1. Fit and tighten external Torx screw (E10, M6 x 16) -2-.
=> Tightening torque: 13 Nm (9.5 ftlb.)
Wire harness mounting, cylinder bank 1-3
9. Fit holder for air-conditioning line at the intake-air distributor for cylinder bank 1-3.
9.1. Fit rubber sleeve -3- , close the holder -2- and tighten fastening nut -1- by hand.
Securing holder for refrigerant lines
Subsequent work
1. Connect B+ line at the starter.
-> 276019 Removing and installing starter .
2. Install resonance tube.
-> 247419 Removing and installing resonance tube Service and Repair.
3. Install engine compartment lid.
-> 557819 Removing and installing engine compartment lid 557819 Removing and Installing Engine Compartment Lid.
4. Connect negative terminal of the battery.
-> 2X00IN02 Work instructions after disconnecting the battery Work Instructions After Disconnecting the Battery.