Group 21
Repairing components
109
2.
Set the valve clearance for each cylinder using a
feeler gauge, according to the
black markings
.
Mark up the rocker arm on each set cylinder,
using a chalk.
Inlet valve clearance: .................
0.35
±0.05
mm
(0.01±0.002”)
Exhaust valve clearance: ...........
0.55
±0.05
mm
(0.02±0.002”)
Valve clearance, checking/adjusting
(21403)
Special tools:
Rotating tool, crankshaft ............................. 999 8676
Cranking tool, flywheel ................................ 999 8681
NOTE!
The normal valve clearance is set when the engine is cold or has cooled down for at least half an hour.
Oil temperature < 80°C (176°F.)
NOTE!
The valve clearance should be at the highest
permissible variation when the cylinder head gasket is
changed and at the lowest permissible variation after
50 hours running.
1.
Rotate the crankshaft until the valves for no. 1
cylinder overlap.
NOTE!
The valves overlapping means: The exhaust
valve is closing. The inlet valve is opening. Neither of
the push rods can be turned in this position. (Number
1 cylinder is nearest the flywheel).
