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ENGINE: HEAD. VALVES· GUIDES· SPRINGS AND ROCKERS
55
Fig. B4 • Cylinder head screws tightening sequence.
1st pass; torque to some 21.7 fUbs (3 kgm). - 2nd pass: torque to
28.9
to
36.2 tUbs (4 to 5 kgm).
- Tighten head hold-down screws according to
the sequence shown
in
fig.
84,
in
two passes:
1st pass, up to a torque of some 21.7 ft.lbs
(3 kgrn);
2nd pass, torque screws to 28.9 ft.lbs (4 kgm),
as specified.
Disassembly and Assembly.
Arrange the head on supporting plate A. 60283
(fig. 85).
Position tool A. 60084 as shown in
fig.
85 and
compress springs so that valve locks are disen-
gaged. Take down spring parts and back out
spark plugs.
Fig. 85 • Removing valves from cylinder head.
1. Spring compressor A. 60084. - 2. Valve locks•• 3. Supporting
plate A. 60283.
Fig. 88 • Tightening head screws by means of torque wrench.
Remove supporting plate and working from the
Wlderside slide off valves from guides.
For disassembly proceed in reverse order to
assembly.
CYLINDER HEAD
Cleaning.
Place the head on fixture A. 60041 (fig. 81).
Using wire brush A. 60036 and a portable drill,
decoke combustion chambers (fig. 81).
Remove scale deposits from exhaust ducts and
coolant jackets; check and clean intake ducts and
oil delivery passage to rockers.
Use wire brush A. 60111 and clean valve guide
ports.
Fig. 81 • Decoklng and cleaning combustion chamber••
1. Drill. - 2. Wire brush. - 3.
Head holding
fixture
A. 60041.
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