Crankshaft Position Sensor: Adjustments

Overview
- Disconnect ground cable of battery, connect.
- Remove poly V-belt tensioning device, install.
- Remove right cylinder head (valve) cover, install.
- Set piston of No. 1 cylinder to 10° before TDC.
- Remove spark plug at No. 1 cylinder, install
Tighten to: 25 Nm
- Screw measuring pin tool No. 116 589 17 21 00 into spark plug thread of No. 1 cylinder, unscrew, refer to step 6 below.
- Remove TDC sensor, install ( refer to step 7 below).
- Clamp dial gauge (01) tight in measuring pin tool with 4 mm preload, refer to step 8 below.
- Turn crankshaft in direction of rotation of engine and set TDC with dial gauge (01), refer to step 8 below.
- Set large point of dial gauge to "0" ( refer to step 8 below).
- Rotate engine, with wrench socket tool 001 689 65 09 00, in direction of rotation of engine until dial gauge has moved by the value, see table "Piston Travel At Crankshaft Setting Of 20° After TDC" below.
- Insert fixing device, special tool 119 589 00 21 00 into adjusting slide, refer to step 10 below.
Fixing device must engage in measuring cam on vibration damper.

Correcting Setting Of TDC Sensor
- Slacken nut of adjusting slide, refer to step 11 below.
- Move adjusting slide until fixing device locks in place in measuring cam on vibration damper, refer to step 11 below.
- Nut of adjusting slide tighten (step 12).


Piston Travel At Crankshaft Setting Of 20° After TDC





NOTE:





- The TDC sensor (2) with bracket is attached to the timing case cover.
- The measuring cam (1) on the vibration damper must be positioned in the middle below the TDC sensor (2) when the crankshaft is in the position 20° after TDC.
- The setting of the TDC sensor must be checked and corrected:
When replacing the crankshaft of the vibration damper.
When replacing the timing case cover.
When fitting parts to basic engines.
- With the cylinder head removed, attach the dial gauge holder to the crankcase and position dial gauge pin on the piston crown.

Procedures
1. Disconnect ground cable at battery.
2. Remove poly V-belt tensioning device refer to Engine.
3. Remove right cylinder head cover, refer to Engine.
4. Position piston of No. 1 cylinder to 100 before TDC.
5. Unscrew spark plug of No. 1 cylinder.





6. Screw measuring pin (arrow), special tool 116 689 17 21 00, into spark plug bore at No. 1 cylinder.





7. Unscrew hexagon nut (arrow) and withdraw TDC sensor (2).

Checking





8. Clamp dial gauge (01) fight into measuring pin, special tool 116 589 17 2100, with 4 mm preload.
Rotate crankshaft in direction of rotation of engine and set TDC precisely with the dial gauge (01).
Turn scale of dial gauge until large pointer of gauge (01) is set to "0".





9. Rotate crankshaft further in direction of rotation until the dial gauge has moved back by the relevant value (piston travel).
10. Position fixing device (4) 119 689 00 2100 into the setting slide (3).
The groove of the fixing device (4) must engage in the measuring cam (1) on the vibration damper.
If the fixing device (4) does not engage, correct position of setting slide (3).

Correcting





11. Slacken nut (arrow) of setting slide and move it until the fixing device (4), special tool 119 589 00 21 00, engages in the measuring cam (1).
12. Screw on setting slide (3) and remove fixing device (4).





13. Insert TDC-sensor (2) and screw on (arrow).
14. Remove dial gauge and measuring pin.
15. Install in the reverse order beginning from step 5.