Mitsubishi S6R Series User Manual

2-18
Chapter 2 SERVICE DATA
2. Tightening Torque Table
2.1 Tightening Torque Spec for Basic Engine
Note:(a) For torque-angle tightening method of cylinder head bolts, follow the steps in sequence given below:
1) Tighten the bolts with a snug torque of 294 ± 14.7 N·m {30 ± 1.5 kgf·m} [217±11 lbf·ft].
2) Tighten to the angle 65± 3°.
3) Loosen all bolts, and then retighten them in the sequence shown in the above 1) and 2).(2-time tightening)
For tightening procedure, refer to "Cylinder Head Bolt - Tighten" of "ASSEMBLY OF BASIC ENGINE".
(b) Tighten the main bearing cap bolt in specified sequence. Tighten them to the half of specified torque, then tighten them
to the specified torque.
For tightening procedure, refer to "Main bearing cap - Install" of "ASSEMBLY OF BASIC ENGINE."
(c) Tighten piston cooling nozzle check valves to the specified torque. Do not over-tighten. If the tightening torque exceeds
the specified torque, it could cause the check valve to malfunction, which may result in piston seizure.
(d) When [Wet] is indicated, apply engine oil to the threads and bolt seat surface.
(e) Connecting rod cap bolts should be tightened as shown below.
Description
Dia x Pitch
(M-thread)
Tightening torque
Remarks
N·m kgf·m lbf·ft
Cylinder head bolt M 22 × 2.5 539 ± 27 55 ± 2.75 397.55 ± 19.91
[Wet] 2-time tightening method,
Note (a)
Cylinder head nozzle gland (studs) M 14 × 2.0 73.5 ± 4.5 7.5 ± 0.5 54.21 ± 3.31
Apply Loctite 272 to the internal
screw thread of the cylinder head
Rocker case M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Rocker shaft M 14 × 2.0 147 ± 7.4 15 ± 0.75 108.42 ± 5.45
Rocker arm (lock nut) M 12 × 1.25 64 ± 3.2 6.5 ± 0.33 47.20 ± 2.36
Bridge (lock nut) M 10 × 1.25 55 ± 2.8 5.6 ± 0.28 40.57 ± 2.06
Camshaft gear M 14 × 1.5 176 ± 8.8 17.9 ± 0.9 129.81 ± 6.49 Use 12T bolt w/hard washer
Camshaft thrust plate M 12 × 1.25 59 ± 5.9 6 ± 0.6 43.52 ± 4.35
Main bearing cap M 22 × 2.5 490 ± 24.5 50 ± 2.5 361.41 ± 18.07 [Wet], Note (b)
Hanger M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Piston cooling nozzle M 12 × 1.75 34 ± 1.7 3.5 ± 0.18 25.08 ± 1.25 Note (c)
Timing gear case M 16 × 1.5 255 ± 12.8 26 ± 1.3 188.08 ± 9.44 Use hard washer
Rear plate M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Front mounting bracket M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Front end lower bolt of right front
mounting bracket only
Rear mounting bracket M 16 × 1.5 216 ± 10.8 22 ± 1.1 159.31 ± 7.96
Connecting rod cap M 22 × 1.5 Note (e) [Wet]
Flywheel M 22 × 1.5 539 ± 27 55 ± 2.75 397.54 ± 19.91 [Wet]
Damper M 22 × 1.5 490 ± 24.5 50 ± 2.5 361.40 ± 18.07
Idler shaft M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98 Apply MOLYKOT
Idler shaft thrust collar (nut) M 18 × 1.5 196 ± 9.8 20 ± 1.0 144.56 ± 7.22
Fuel injection
Accessory drive
Case M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Gear (nut) M 30 × 1.5 490 ± 24.5 50 ± 2.5 361.40 ± 18.07
Governor drive case M 12 × 1.25 108 ± 5.4 11 ± 0.55 79.66 ± 3.98
Bolt mark
Torque method
(2-time tightening method)
Angle controlled method (2-time tightening method)
2
539 ± 27 N·m {55 ± 2.75 kgf·m}
[398 ± 20 lbf·ft]
Snug torque 245 ± 12.3 N·m {25 ± 1.25 kgf·m} [180 ± 9 lbf·ft] → 60 ± 3°
AU
637 ± 31.9 N·m {65 ± 3.25 kgf·m}
[470 ± 24 lbf·ft]
AL Snug torque 294 ± 14.7 N·m {30 ± 1.5 kgf·m} [217 ± 11 lbf·ft] → 60 ± 3°

Mitsubishi S6R Series Specifications

General

Brand	Mitsubishi
Model	S6R Series
Category	Engine
Language	English