Vetus D-LINE VD4.120 Operation Manual page 70

6 Maintenance
51 Adjusting the valve clearance
Check valve clearance and adjust if necessary
• Allow the engine to cool down for at least
30 minutes before you adjust the valve
clearance: lube oil temperature less than
80°C.
• Loosen the screws.
• Remove the valve cover.
68
• Remove the gasket.
• The turning tool is placed on the mounting
screws of the pulleys.
• Rotate the crankshaft until the valves over-
lap.
Exhaust valve is not yet closed, inlet valve
starts opening.
Checking valve clearance
Every 1500 operating hours.
1 Lock nut
2 Adjusting screw
3 Angle gauge
4 Key socket for socket wrench
5 Magnet