Knock Sensor: Service and Repair
WM 287219 Removing and installing knock sensor
Technical values
Preliminary work
1. Remove engine compartment lid. -> 557819 Removing and installing engine compartment lid - section on "Removing" 557819 Removing and Installing Engine Compartment Lid
2. Remove intake-air distributor for cylinders 1-3 (only for knock sensor for cylinders 1-3). -> 244619 Removing and installing intake-air distributor - section on "Removing" Service and Repair
Removing knock sensor
Removing knock sensor for cylinder bank 1-3
Information
Before removing the knock sensor, mark the installation position using a water-resistant marker.
1. Remove knock sensor for cylinders 1-3.
1.1. Mark the position of the knock sensor for cylinder bank 1-3.
1.2. Unscrew external Torx screw (M8 x 35) -4- on the knock sensor.
1.3. Release and pull off cable plug -3- on the knock sensor and remove the knock sensor in an upward direction.
Knock sensor for cylinder bank 1-3
Removing knock sensor for cylinder bank 4-6
Information
Before removing the knock sensor, mark the installation position using a water-resistant marker.
1. Remove holder -1- for left fuel connection line. To do this, unscrew external Torx screw (M6 x 45) -3- and external Torx screw (M6 x 12) -2-.
Fuel line holder
2. Remove cable duct on holder for intake-air distributor for cylinder bank 4-6 and pull it back slightly.
3. Mark the position of the knock sensor for cylinder bank 4-6 -1-.
4. Unscrew external Torx screw -3- from the knock sensor -1-.
5. Release and pull off connector -2- on the knock sensor -1- and remove the knock sensor -1- in an upward direction.
Knock sensor for cylinder bank 4-6
Installing knock sensor
Installing knock sensor for cylinder bank 1-3
1. Plug in connector -3- on knock sensor for cylinder bank 1-3 and position knock sensor.
1.1. Fit external Torx screw (M8 x 35) -4- , check the position of the knock sensor and tighten the external Torx screw -4-.=> Tightening torque: 23 Nm (17 ftlb.)+/-2 Nm (+/-1.5 ftlb.)
Knock sensor for cylinder bank 1-3
Installing knock sensor for cylinder bank 4-6
1. Plug in connector -2- on knock sensor -1- and position knock sensor.
1.1. Fit external Torx screw (M8 x 35) -3- , check the position of the knock sensor -1- and tighten the external Torx screw (M8 x 35) -3-. => Tightening torque: 23 Nm (17 ftlb.)+/-2 Nm (+/-1.5 ftlb.)
Knock sensor for cylinder bank 4-6
2. Fit cable duct on holder for intake-air distributor for cylinder bank 4-6. => Tightening torque: 13 Nm (9.5 ftlb.)
3. Install holder -1- for left fuel connection line. To do this, fit and tighten external Torx screw (M6 x 45) -3- and external Torx screw (M6 x 12) -2-.=> Tightening torque: 13 Nm (9.5 ftlb.)
Fuel line holder
Subsequent work
1. Install intake-air distributor for cylinders 1-3 (only for knock sensor for cylinders 1-3). -> 244619 Removing and installing intake-air distributor - section on "Installing" Service and Repair
2. Install engine compartment lid. -> 557819 Removing and installing engine compartment lid - section on "Installing" 557819 Removing and Installing Engine Compartment Lid