Specifications

Service Training
Page 23
Section 4.1
09.06
4.1.2.4 ADJUSTING VALVE CLEARANCE
The adjustment can be carried out when the engine is cool or warm after a cooling period of at least 30
minutes (oil temperature < 80 °C).
Valve clearance: Inlet 0.3
+0.1
mm
Outlet 0.5
+0.1
mm
adjustable
not adjustable
VALVE CLEARANCE SCHEMATIC
Crankshaft position 1
Turn the engine until the valve inlet and outlet of
cylinder 1 are just open.
Crankshaft position 2
Turn the engine one full revolution (360 °).
NOTE: When a new rocker cover is installed, increase the valve clearance by 0.1 mm. Adjust the
valve clearance to normal values after 50 service hours.
ADJUST & CHECK THE VALVE CLEARANCE
- Unscrew the venting valve and swivel it to the side.
- Dismount the cylinder head cover.
- Crankshaft position as shown in adjusting diagram.
- Prior to a valve clearance adjustment the motor must
have cooled down for at least 30 minutes: Oil temperature
less than 80 °C.
- Check the valve clearance (1) between the rocker cog
(2) and the valve (3) with feeler gauge (6) (Gauge must
overcome slight resistance to be slid in).
For permissible valve clearance see above.
Tighten locknut: Demand value: 20 ±2 Nm