90
CHECKING AND ADJUSTING
VALVE CLEARANCE
Tools required
Number
Description
Illustration
99309
Turning tool
for rotating
the flywheel
from below
2 402 509
Turning tool
for rotating
the flywheel
from above
Other tools
Torque wrench, 0-50 Nm
Waterproof felt-tip pen
Feeler gauge 0.45 and 0.70 mm
Flash light
Mirror
WARNING !
Block the starting device or remove a battery cable. If
the engine starts unexpectedly, there is a serious risk of
injury.
IMPORTANT !
The engine must be cold when the work is carried out.
Remember to remove the turning tool from the flywheel
after adjustment.
Note:
Carry out the working without pausing, so that no step
is overlooked.
Carry out a check and adjustment of the valve clearances
one more time after the first 500 hours of operation.
After this, adjustment according to the regular interval
takes place, which is every 2,000 operational hours.
S08
MAINTENANCE
The reference information UP TDC,DOWN TDC and the
angle indications listed in the table below are engraved
on the flywheel. Depending on the engine installation
and type of flywheel housing, this information is visible
in one of the windows, either furthest up or furthest
down on the flywheel. See illustration below:.
Upper and lower window to read the engraving on the flywheel.
Valve clearance, specifications
Intake valve
0.45mm (0.018 in)
Exhaust valve
0.70mm (0.028 in)
Tightening torque
Lock nut for valves
35 Nm (26 lb-ft)
Adjust valves according to the table below. Follow
the respective column depending on whether you are
reading the engraving on the flywheel in the lower or the
upper window. Start adjustment at the top of the table.
Reading in the
lower window
Valve transition
on cylinder
Adjust valves on
cylinder
Reading in the
upper window
DOWN TDC
6
1
UP TDC
120/480
2
5
300/660
240/600
4
3
60/420
DOWN TDC
1
6
UP TDC
120/480
5
2
300/600
240/600
3
4
60/420
Summary of Contents for N16.1000 CR3
Page 2: ......
Page 4: ......
Page 34: ...34 S05 COMPONENTS ENGINE VIEWS N16 CR3...
Page 35: ...35 NOTES...
Page 48: ...48 S06 INSTRUMENTATION SYSTEM LAYOUT INCLUDING OPTIONS...
Page 118: ......
