Engine tightening torques
 
Application description
 
Thread length
 
Threading
 
Torque (Nm)
 
Note
 
Nom.
 
Min.
 
Max.
 
Head
 
Idler pulley pin
   
M20x1
 
45
 
40
 
50
 
Pre-applied product
 
FIXED and MOBILE tensioner pin
   
M20x1
 
50
 
45
 
55
 
LOCK 2 or TB 1324
 
Camshaft pulley ring nut
   
M17x1
 
71
 
64
 
78
 
GREASE A
 
Rocker arm shaft blanking cap
   
M12x1.25
 
14
 
12
 
16
 
Pre-applied product
 
Water union temperature sensor
   
M12x1.5
 
23
 
20
 
26
 
LOCK 4: Lock insert when tightening
 
Cylinder/head stud bolt nut
(snug torque)
   
M10x1.5
 
20
     
Apply GREASE C on nut underside and on stud bolt thread
 
Cylinder/head stud bolt nut
(preload)
   
M10x1.5
 
40
 
38
 
42
 
 
Cylinder/head stud bolt nut
(tightening)
   
M10x1.5
 
60
 
57
 
63
 
 
Cam cap retaining screw
(preload)
 
32
 
M8x1.25
 
10
 
9
 
11
 
Apply oil SHELL ADVANCE ULTRA 4
 
Cam cap retaining screw
(tightening)
 
32
 
M8x1.25
 
22,5
 
21
 
25
 
 
Coil screw
 
18
 
M6x1
 
10
 
9
 
11
 
 
Pulley flange retaining screw
 
12
 
M6x1
 
10
 
9
 
11
 
 
Head cover retaining nut
   
M6x1
 
10
 
9
 
11
 
 
Coil retaining nut
   
M6x1
 
10
 
9
 
11
 
 
Intake manifold retaining nut
   
M6x1
 
10
 
9
 
11
 
 
Head cover retaining screw
   
M6x1
 
10
 
9
 
11
 
 
Secondary air cover retaining screw
   
M6x1
 
10
 
9
 
11
 
 
Stud bolt for exhaust manifold
 
16
 
M6x1
 
10
 
9
 
11
 
LOCK 5
 
Screw for securing vacuum gauge to cylinder head
 
8
 
M6x1
 
5
 
4
 
6
 
LOCK 2 (or TB 1324)
(Europe versions)
 
Union on head for canister
   
M6x1
 
5
 
4
 
6
 
LOCK 2 (or TB 1324)
(California versions)
 
Horizontal head air breather union
   
M6x1
 
2,5
 
2
 
3
 
LOCK 2
 
Vertical head air breather blanking dowel
 
8
 
M6x1
 
10
 
9
 
11
 
LOCK 6
 
Intake manifold retaining screw
 
16
 
M6x1
 
10
 
9
 
11
 
 
Water temperature sensor
   
M8x1.25
 
6
 
5
 
7
 
 
Head unions on head retaining screw
 
16
 
M5x1
 
6
 
5
 
7
 
Pre-applied product
 
Crankcase
 
Oil cartridge
   
M16x1.5
 
11
 
10
 
12
 
Oil SHELL ADVANCE ULTRA 4 on seal
 
Nipple for oil cartridge
   
M16x1.5
 
42
 
38
 
46
 
LOCK 2 (or TB 1324)
 
Oil intake duct cap
   
M16x1.5
 
24
 
21
 
27
 
LOCK 5
 
Oil cooler nipple
   
M14x1.5
 
32
 
29
 
35
 
LOCK 5
 
Oil drain plug with magnet
   
M12x1.5
 
20
 
18
 
22
 
TB1215
 
Clutch-side crankcase oil channel blanking cap
 
16
 
M10x1.5
 
15
 
13
 
17
 
LOCK 5
 
Taper cap
   
M10x1
 
20
 
18
 
22
 
LOCK 5
 
Neutral sensor
   
M10x1.25
 
10
 
9
 
11
 
 
Oil pump screw adapter bush
   
M10x1
       
LOCK 5
 
Dowel for oil channel inside clutch-side crankcase
 
18
 
M10x1.5
 
15
 
13
 
17
 
LOCK 5
 
Roller bearing flange hole taper blanking plug
 
8
 
M10x1.5
 
22
 
20
 
24
 
LOCK 2 (or TB 1324)
 
Cylinder/head stud bolt
   
M10x1.5
 
30
 
28
 
32
 
LOCK 2 (or TB 1324)
 
Crankcase jointing screw at cylinder area
(preload)
 
90
 
M8x1.25
 
19
 
17
 
21
 
GREASE B on thread
 
Crankcase jointing screw at cylinder area
(tightening)
 
90
 
M8x1.25
 
25
 
22
 
28
 
 
Central crankcase screw + swinging arm pivot (preload)
 
75
 
M8x1.25
 
19
 
17
 
21
 
GREASE B on thread
 
Central crankcase screw + swinging arm pivot (tightening)
 
75
 
M8x1.25
 
25
 
22
 
28
 
 
Gear stopper retaining screw
 
21,5
 
M8x1.25
 
18
 
16
 
20
 
LOCK 2 (or TB 1324)
 
Special grub screw for roller bearing flange
 
14
 
M8x1.25
 
16
 
15
 
17
 
LOCK 2 (or TB 1324)
 
Blow-by valve retaining screw
 
16
 
M6x1
 
10
 
9
 
11
 
 
Chain side secondary bearing retaining screw
 
12
 
M6x1
 
10
 
9
 
11
 
LOCK 2 (or TB 1324)
 
Clutch side primary bearing retaining screw
 
16
 
M6x1
 
10
 
9
 
11
 
LOCK 2 (or TB 1324)
 
Crankcase jointing screw at idle gear pin area
 
75
 
M6x1
 
10
 
9
 
11
 
 
External crankcase jointing screw
 
35
 
M6x1
 
10
 
9
 
11
 
 
Mesh filter cover screws TSPEI - TEF
 
16
 
M6x1
 
10
 
9
 
11
 
TB 1215
 
Radial pick-up retaining screw
 
18
 
M6x1
 
10
 
9
 
11
 
 
Screw retaining upper shell of blow-by valve
   
M3
 
1,2
 
1
 
1,4
 
LOCK 5
 
Piston oil squirter screw
 
10
 
M5x0.8
 
8
 
7
 
9
 
LOCK 2 (or TB 1324)
 
Electric starter
 
Inner starter motor retaining screw TCEI - TCEIF
 
18
 
M6x1
 
10
 
9
 
11
 
Pre-applied product
 
External starter motor retaining screw
 
25
 
M6x1
 
10
 
9
 
11
 
Pre-applied product
 
Rear starter motor retaining screw
 
30
 
M6x1
 
10
 
9
 
11
 
Pre-applied product
 
Idle gear pin retaining screw
 
70
 
M6x1
 
10
 
9
 
11
 
LOCK 2 (or TB 1324)
 
Connecting rods
 
Flywheel nut
   
M24x1
 
330
 
313
 
346
 
LOCK 5
 
Steel/aluminium crankshaft plug
   
M20x1
 
15
 
13,5
 
16,5
 
LOCK 5
 
Balancing plug
   
M12x1.25
 
28
 
26
 
30
 
LOCK 5
 
Con-rod screw (Class 12.9)
 
4
 
M10x1
        
 
1) Apply specified grease on the thread
           
GREASE B on thread
 
2) Tightening at 50 rpm
       
35
   
 
3) Pause 2 seconds and undo by 360° at 30 rpm
           
 
4) Pre-tighten at 30 rpm
       
20
   
 
5) Pre-tighten at 10 rpm
       
35
   
 
6) Tightening by 65º +/-1º at 14 rpm
           
 
7) Torque check
       
70 ÷ 103
   
 
Con-rod screw (Class 14.9)
 
4
 
M10x1
       
 
1) Apply specified grease on the thread
           
GREASE B on thread
 
2) Tightening at 50 rpm
       
35
   
 
3) Pause 2 seconds and undo by 360° at 30 rpm
           
 
4) Pre-tighten at 30 rpm
       
20
   
 
5) Pre-tighten at 10 rpm
       
35
   
 
6) Tightening by 65º +/-1º at 14 rpm
           
 
7) Torque check
       
70 ÷ 113
   
 
Crankshaft grub screw
 
8
 
M8x1.25
 
13
 
11
 
15
 
LOCK 5
 
Crankshaft drilled grub screw
 
8
 
M8x1.25
 
13
 
11
 
15
 
LOCK 5
 
Gearchange mechanism
 
Gearbox drum positioning screw
   
M16x1.5
 
30
 
27
 
33
 
 
Gearbox pawl screw
 
25
 
M8x1.25
 
36
 
34
 
38
 
LOCK 2 (or TB 1324)
 
Pawl positioning nut
   
M6x1
 
10
 
9
 
11
 
 
Gearbox pawl screw
 
20
 
M6x1
 
16
 
15
 
17
 
LOCK 2 (or TB 1324)
 
Timing system
 
Timing transmission pulley ring nut
   
M15x1
 
71
 
64
 
78
 
GREASE A
 
Timing idle gear nut
   
M14x1
 
55
 
50
 
60
 
GREASE A
 
FIXED tensioner bearing stopper screw
   
M14x2
 
50
 
45
 
55
 
GREASE A
 
MOBILE tensioner retaining nut
   
M8x1.25
 
25
 
22
 
28
 
GREASE A
 
Carbon cover screw
 
18
 
M6x1
 
6
 
5,5
 
6,5
 
Pre-applied product
 
Plastic cover screw
 
18
 
M6x1
 
10
 
9
 
11
 
Pre-applied product
 
Carbon cover filter support screw
 
8
 
M4x0.7
 
1,75
 
1,5
 
2
 
 
Self-tapping screw for cover filter
 
12
 
AF3.5
 
1,75
 
1,5
 
2
 
 
Covers
 
Water inlet union
   
M30x1.5
 
25
 
23
 
27
 
LOCK 5
 
Water delivery union
   
M22x1.5
 
25
 
23
 
27
 
LOCK 5
 
Wet clutch fluid filler cap
   
M20x1.5
 
5
 
4,5
 
5,5
 
 
Pick-up inspection screw
   
M12x1
 
15
 
13
 
17
 
LOCK 2 (or TB 1324)
 
Water pump cover plug
   
M10x1
 
15
 
13,5
 
16,5
 
LOCK 5
 
Oil duct blanking cap
   
M10x1
 
15
 
13,5
 
16,5
 
LOCK 5
 
Water pump bearing stopper screw
 
16
 
M6x1
 
10
 
9
 
11
 
LOCK 2 (or TB 1324)
 
Timing inspection cover screw TSPEI
 
14
 
M6x1
 
5
 
4,5
 
5,5
 
 
Water pump cover screw (through hole) TCEI
 
18
 
M6x1
 
10
 
9
 
11
 
LOCK 6
 
Water pump cover screw TCEI
 
18-25
 
M6x1
 
10
 
9
 
11
 
 
Generator cover screw TCEIF
 
30-35
 
M6x1
 
13,5
 
12,5
 
14,5
 
 
Generator stator retaining screw
 
30-40
 
M6x1
 
10
 
9
 
11
 
LOCK 2 (or TB 1324)
 
Clutch cover screw
 
30-80-90
 
M6x1
 
13,5
 
12,5
 
14,5
 
 
Screw securing special clutch cover to stud bolt
 
30
 
M6x1
 
13,5
 
12,5
 
14,5
 
 
Clutch cover cable grommet retaining screw
 
12
 
M6x1
 
10
 
9
 
11
 
 
Generator cover to clutch rod plug retaining screw
 
12
 
M6x1
 
10
 
9
 
11
 
 
Gearbox and clutch
 
Wet clutch drum nut.
   
M25x1.5
 
190
 
180
 
200
 
GREASE B
 
Wet clutch spring screw
 
20
 
M5x0.8
       
 
Ignition
 
Spark plug
   
M10x1
 
12
 
11
 
13
 
 
Rotor to flywheel retaining screw
 
25-35
 
M6x1
 
13
 
11
 
15
 
Pre-applied product
 
Oil pump
 
By-pass pump cap
   
M15x1
 
17
 
15
 
19
 
LOCK 5
 
Oil pump screw
 
40
 
M8x1.25
 
26
 
23
 
29
 
 
Oil pump assembly screw
 
25
 
M6x1
 
10
 
9
 
11
 
 
Oil pump screw
 
25
 
M6x1
 
10
 
9
 
11
 
 
Cylinders
 
Water delivery union
   
M22x1.5
 
25
 
23
 
27
 
LOCK 5
 
Cooling circuit
 
Water circuit clamps
     
2,5
 
2
 
3