57
1
Remove valve covers. When checking valve clear-
ance the engine should be turned in the direction of
rotation. Turning is carried out using the engines poly-
gon hub with a 24 mm socket and ratchet.
2
Turn the engine in the direction of rotation until Cyl-
inder 1 piston is at Top Dead Center after the com-
pression stroke. At this the valves on cylinders nos 6
(6 cylinder) and 4 (4 cylinder) rock.
Applies to 31/32 series
Adjust the valve clearance for Cylinder 1. Turn the
engine a half revolution in the direction of rotation and
check the play on cylinder 3. The valves on cylinder
2 then “rock”. Check the play for the other cylinders
in firing order.
Applies to 41/42/43 series
Adjust the valve clearance for Cylinder 1. Turn the
engine a third of a revolution in the direction of rota-
tion and check the play on cylinder 5. The valves on
cylinder 2 then “rock”. Check the play for the other
cylinders in firing order.
Applies to 44/300 series
Slacken off the locknut and the adjuster screw on
valve pair no 1 in Cylinder 1 so that there is play be-
tween the yoke and the valve stem.
Repair Instructions
Valves, adjusting
NOTE! The clearance must never be checked with
the engine running – the engine must be stopped –
cold or at operating temperature.
On the KA(M)D44/300 each pair of valves is adjusted
in two stages. First the valve yokes are set then the
rocker clearance is adjusted
Valve location and cylinder numbering 31/32 series
Valve location and cylinder numbering 41/42/43 se-
ries
Valve location and cylinder numbering 44/300 series
Valve clearance
Intake
❍
0.40 mm
Exhaust
●
0.40 mm
4-cylinder engines:
Firing order
1
3
4
2
Corresponding
cylinder whose
valves “rock”
4
2
1
3
6-cylinder engines:
Firing order
1
5
3
6
2
4
Corresponding
cylinder whose
valves “rock”
6
2
4
1
5
3
