39
4.
Measure valve lift as follows:
When the valves “change”
direction (open/close)
Measure valve lift
on cylinder no.
on cylinder no.
1 .................................................... 6
5 .................................................... 2
3 .................................................... 4
6 .................................................... 1
2 .................................................... 5
4 .................................................... 3
5.
Check the valve time for no. 1 cylinder (see table
below).
6.
Adjust the valves to correct clearance, see below.
Valve clearance should be adjusted with a cold engine.
Pull out the manual stop control!
Adjusting
1.
Fit crank tool 8068.
2.
Crank the flywheel in its direction of rotation until
no.1 cyl. piston is at top dead centre position after
the compression stroke (0
°
on the flywheel).
Adjust valves: 1, 2, 4, 5, 8, 9
Again crank the flywheel in its direction of rota-
tion (one turn) until no. 6 cyl. piston is at top dead
centre position after the compression stroke (0– on
the flywheel).
Adjust valves: 3, 6, 7, 10, 11, 12
Replace valve cover gaskets if necessary.
Valve clearance:
❍
Inlet: 0.40 mm
●
Exhaust: 0.70 mm
Camshaft lift A
Valve lift B
Checking camshaft adjustment
Valve lift must be within the stated tolerance in order
to be able to check the camshaft adjustment.
Checking camshaft adjustment (cold engine and
valve clearance = 0).
With flywheel position at 10
°
A.T.D.C. the no. 1 cyl-
inder inlet valve should open 4. 2 – 4.8 mm.
8068
Min. camshaft lift in mm (A)
Min. valve lift in mm
(new camshaft)
0 mm valve clearance (B)
inlet
exhaust
inlet
exhaust
8.4
9.0
13.0
14.0
Adjusting valves
Special tool: (999) 8068 Crank tool
