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Technical Data
Important bolts and nuts D34 MT
Description
Cylinder head bolts
Rocker shaft brackets
Rocker arm lock nuts
Valve bridge lock nuts
Camshaft gear
Camshaft thrust plate
Main bearing caps
Main bearing cap side bolts
Piston cooling nozzles
Timing gear case
Rear plate
Oil pan
Front mounting bracket
Rear mounting bracket
Connecting rod bearing caps
Flywheel
Crankshaft pulley and damper
Idler shaft
Idler gears
Oil pump drive gear shaft
Oil pump cover
Freshwater pump impeller
Freshwater pump pulley
(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 short bolts to 118 Nm (12 kpm) [86,8 lbf.ft], then tighten 60°
more.
(d) Tighten bolts according to the following sequence:
1. Tighten the cap bolts to specified torque
2. Tighten side bolts on the right side of the engine
3. Tighten side bolts on the left side of the engine
(e) 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.
(f) Tighten connecting rod caps according to the angle method, tighten to 147 Nm [15 kpm)[108,5 lbf.ft], then tighten 45° more.
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80
Thread
Diam.xPitch
Nm
(M-Thread)
20 x 2,5
392
12 x 1,75
49
12 x 1,25
64
10 x 1,25
55
30 x 1,5
294
12 x 1,25
59
24 x 3
588
16 x 1,5
147
12 x 1,75
34
12 x 1,75
98
12 x 1,25
98
10 x 1,5
39
20 x 1,5
392
18 x 2,5
245
18 x 1,5
343
22 x 1,5
539
22 x 1,5
539
12 x 1,75
54
10 x 1,25
39
27 x 1,5
294
10 x 1,25
26,3-39,7
22 x 1,5
196
24 x 1,5
245
Torque
kpm
lbf.ft
Notes
40
289
(a) (b) (c)
5
36
6,5
47
5,6
40
30
216
Left-hand thread
6
43
60
434
(a)(d)
15
108
(a)(d)
3,5
25
(e)
10
72
10
72
4
29
40
290
25
181
35
253
(a) (f)
55
398
(a)
55
398
5,5
40
4
29
30
216
2,7-4,1
18-32
20
145
25
181
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