SERVICE MANUAL
CYLINDER HEAD & VALVES
Section 3
PROCEDURE
Tighten cylinder head bolts following the assembly steps
listed:
1.
Lubricate bolt threads, bolt head seating areas
and washers (where applicable) with clean
engine oil.
2.
Tighten bolts in three (3) stages: Stage 1
Following sequence "A" tighten bolts to 150 N-m
(110 Ibf-ft).
Stage 2 Following sequence "A" tighten bolts to
210 N-m (155 Ibf-ft).
Stage 3 Following sequence "B" tighten bolts, in
rows, to 225 N•m (165 Ibf-ft).
NOTE: DO NOT back bolt off, "pull up" to torque
level indicated.
IMPORTANT: This procedure accommodates both
old and new style cylinder head bolts.
NOTE: Check the two end rocker arms for freedom
of motion after torquing first stage.
8.
Adjust valve lash following procedure described
in this Section.
9.
Adjust
valve
timing
following
procedure
described in this Section.
10.
Install valve cover as follows:
a.
Replace old packing rings with new under
valve cover bolt washers to avoid oil leaks.
b.
Replace old valve cover gasket with a new
gasket to assure an oil tight seal.
c.
Tighten the bolts to 3 N•m (26 Ibf-in.).
11.
Install and connect leak lines to injection nozzle
holders.
12.
Using a new gasket, install and secure
thermostat and thermostat housing to cylinder
head. Secure hoses.
13.
Using new gaskets install intake and exhaust
manifolds as described in Section 2.
14.
Reconnect fuel lines to injection nozzles and
pump. Torque fittings to 47 N•m (35 Ibf-ft).
15.
Fill cooling system to proper level (see
Operator's Manual).
16.
Operate engine under load for at least one hour,
to bring it up to normal operating temperature
(see ENGINE RUN IN SCHEDULE in Section 5).
17.
After removal of cylinder head and replacement
of a new cylinder head gasket, cylinder head
bolts must be re-torqued and valve adjustments
re-checked following the first hour of operation.
(Refer to Fig. 41 for torquing sequence).
IMPORTANT: "New Style" cylinder head bolts with
flange heads must NOT be intermixed with "Old
Style" bolts and hardened washers. "New Style"
bolts DO NOT use washers.
CGES-185-3
PRINTED IN UNITED STATES OF AMERICA
Page 35
