Torque-To-Yield Procedure For Cylinder Head Bolts - Navistar INTERNATIONAL DT 466 Service Manual

146
Torque-to-Yield Procedure for Cylinder Head
Bolts
CAUTION: To prevent engine damage, do not reuse
cylinder head bolts; install new bolts.
NOTE: Do not use chlorinated solvents on cylinder
head bolts. Parts should be clean, dry, and free of
chemicals other than engine oil.
1. Lightly lubricate threads and bolt flange of new 26
cylinder head bolts with clean engine oil.
2. Install all new cylinder head bolts finger tight.
20
24
16
23
15
19
Figure 198 Torque sequence A for cylinder head bolts
3. Tighten each cylinder head bolt to 204 N·m (150
lbf·ft) in cylinder head torque sequence A.
21
15
14
7
1
Figure 199 Torque sequence B for cylinder head bolts
4. Tighten each cylinder head bolt to 204 N·m (150
lbf·ft) in cylinder head torque sequence B.
Read all safety instructions in the "Safety Information" section of this manual before doing any procedures.
CYLINDER HEAD AND VALVE TRAIN
12 4
8
7
11 3
22 23
16
9
8
2
3
Follow all warnings, cautions, and notes.
© 2009 Navistar, Inc.
5
9
1
2
10
6
24
18
17
11
10
4
NOTE: It is necessary to tighten cylinder head bolts
in both sequence A and B to obtain uniform head bolt
torque.
EGES-265-2
21
13
17
26
18
22
14
H08040
25 26
19
20
12 13
5 6
25
H08105