2-21
Chapter 2 SERVICE DATA
2. Tightening Torque Table
2.1 Tightening Torque Spec for Basic Engine
Note:(a) Tighten cylinder head bolts as shown in the table below.
For tightening procedure, refer to "Cylinder Head Bolt - Tighten" of "ASSEMBLY OF BASIC ENGINE".
(b) For tightening of main bearing cap bolts and main bearing cap side bolts, follow the specified sequence. Snug tighten
the all bolts to the half of specified torque, and after the snug tightening of all the bolts is completed, then finally 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.
(f) Parts (bolts/nuts) indicated by 2-time tightening method are to be tightened as follows: tighten to the specified torque,
and loosen, then retighten to the specified torque.
Description
Dia x Pitch
(M-thread)
Tightening torque
Remarks
N·m kgf·m lbf·ft
Cylinder head bolt 20 × 2.5 Note (a) [Wet]
Rocker cover 12 x 1.25 15 ± 2 1.5 ± 0.2 10.9 ± 1.5
Rocker shaft bracket 12 x 1.75 49 ± 2.5 5 ± 0.25 36 ± 1.81
Rocker arm (lock nut) 12 x 1.25 64 ± 6.4 6.5 ± 0.65 47 ± 4.70
Bridge (lock nut) 10 x 1.25 55 ± 5.5 5.6 ± 0.56 40.5 ± 4.05
Camshaft gear 30 x 1.5 294 ± 15 30 ± 1.5 217 ± 10.9 Left-hand thread
Main bearing cap 24 × 3.0 588 ± 29 60 ± 3.0 434 ± 22 [Wet], Note (b)
Main bearing cap (side bolt) 16 × 2.0 147 ± 7.4 15 ± 0.75 109 ± 5.42 [Wet], Note (b)
Piston cooling nozzle 12 x 1.75 34 ± 1.7 3.5 ± 0.17 25.3 ± 1.23 Note (c)
Timing gear case
12 x 1.75 98 ± 4.9 10 ± 0.5 72 ± 3.6
16 x 1.5 255 ± 12.8 26 ± 1.3 188 ± 9.4
Rear plate 12 x 1.25 98 ± 4.9 10 ± 0.5 72 ± 3.6
Front mounting bracket 20 x 1.5 392 ± 20 40 ± 2.0 289 ± 14
Rear mounting bracket 18 × 2.5 245 ± 12 25 ± 1.3 180 ± 9.4
Connecting rod cap 18 x 1.5 Note (e) [Wet]
Balance weight 16 x 1.5 196 ± 10 20 ± 1.0 145 ± 7.2
Flywheel 22 x 1.5 539 ± 27 55 ± 2.8 397 ± 20.3 [Wet]
Damper 22 x 1.5 539 ± 27 55 ± 2.8 397 ± 20.3
Idler shaft 12 x 1.75 54 ± 2.7 5.5 ± 0.28 39.8 ± 2.03
Idler gear thrust plate 10 x 1.25 39 ± 3.9 4.0 ± 0.4 28 ± 2.9
Fuel injection pump gear 30 x 1.5 294 ± 15 30 ± 1.5 217 ± 10.9
Oil pump gear 27 × 1.5 294 ± 15 30 ± 1.5 217 ± 10.9
Parts name
Torque method (2-time tightening
method)
Angle method (2-time tightening
method)
Cylinder head bolt (short)
392 ± 20 N·m
{40 ± 2.0 kgf·m}
[289.1± 14.75 lbf·ft]
118 ± 5.9 N·m {12 ± 0.6 kgf·m}
[87± 4.3 lbf·ft] →
Type 1:75 ± 3° Type 2:110± 3°
Cylinder head bolt (long)
196 ± 9.8 N·m {20 ±1.0 kgf·m}
[144 ±7.2 lbf·ft] →
Type 1: 75 ± 3° Type 2:110± 3°
Torque method (2-time tightening method) Angle method (2-time tightening method)
343 ± 17 N·m {35 ± 1.8 kgf·m} [253 ± 12 lbf·ft] Snug torque 147 ± 7.4 N•m {15 ± 0.75 kgf•m} [147 ± 7.4 lbf•ft]→45 ± 3°
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