79
Technical Data
Tightening torque tables
Important bolts and nuts D49A MS
Thread
Torque
Description
Diam.xPitch
Nm
kpm
lbf.ft
Notes
(M-Thread)
Cylinder head
22 x 2,5
539
55
398
(a) (b) (c)
Cylinder head nozzle gland (studs)
14 x 2,0
69-78
7-8
51-58
Rocker case
12 x 1,25
108
11
80
Rocker shaft
14 x 2,0
147
15
108
Rocker arm lock nuts
12 x 1,25
64
6,5
47
Bridge lock nuts
10 x 1,25
55
5,6
40
Camshaft gear
12 x 1,25
108
11
80
Camshaft thrust plate
12 x 1,25
59
6
43
Main bearing caps
22 x 2,5
588
60
434
(a)
Main bearing cap side bolts
20 x 2,5
392
40
289
Hanger
12 x 1,25
392
40
289
Hanger
16 x 1,5
216
22
159
Piston cooling nozzle
12 x 1,75
34
3,5
25
(d)
Timing gear case
16 x 1,5
255
26
188
Rear plate
12 x 1,25
108
11
80
Rear plate
16 x 1,5
216
22
159
Oil pan
12 x 1,25
59
6
43
Front mounting bracket
20 x 1,5
392
40
289
Rear mounting bracket
20 x 1,5
392
40
289
Connecting rod metal caps
22 x 1,5
539
55
398
(a) (e)
Flywheel
22 x 1,5
539
55
398
(a)
Balance weight
22 x 1,5
490
50
362
Viscous damper
22 x 1,5
490
50
362
Ring gears
10 x 1,25
59
6
43
Rear idler shaft
20 x 1,25
392
40
289
Rear idler shaft (nuts)
18 x 1,5
196
20
145
Front gear case
12 x 1,25
59
6
43
Front gear case
16 x 1,5
216
22
159
Front plate
12 x 1,25
59
6
43
Front idler shaft
12 x 1,25
108
11
80
Front idler gear thrust plate
10 x 1,25
29
3
22
Exhaust manifold V-clamp nuts
6 x 1,0
9
0,9
6,5
Exhaust manifold mounting bolts
10 x 1,5
98
10
72
(a) Wet , apply lubrication oil to the threads of the nut and bolt.
(b) 2-step tightening method
(c) Tighten cylinder head bolts according to the angle method, tighten to 294 Nm [30 kpm; 217 lbf.ft], then tighten 60° more.
(d) Extremely important to use torque wrench in tightening the piston cooling nozzles. Failure to do so may result in excessive
tightening torque, which may cause valve malfunctions that could lead to seizing of pistons due to insufficient lubrication.
(e) Tighten connecting rod caps according to the angle method, tighten to 245 Nm [25 kpm; 181 lbf.ft], then tighten 60° more.
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Summary of Contents for D49A MS
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