Perkins 103-13 - Thread Sealant; Recommended Torque Tensions

2
14 Workshop Manual, TPD 1377E, issue 4
100 Series
Thread Sealant
When setscrews or studs are fitted into holes which are tapped through the cylinder block, a suitable sealant
must be used to prevent leakage.
Micro encapsulated anaerobic sealant (M.E.A.S) fasteners have been introduced instead of jointing
compounds or other sealants when the fasteners are fitted in through holes into oil or coolant passages. The
identification of these fasteners, as supplied, is by a red, blue, or other colour sealant around the fastener
threads.
With M.E.A.S. sealed studs, the sealed end must be fitted into the cylinder head / cylinder block etc. Ensure
that the threaded holes have a 1,59 mm (0.0625 in) 45° chamfer, to ensure that when the new fasteners are
fitted the M.E.A.S. sealant is not removed. If the fasteners have to be removed and fitted again, the threads
must be cleaned and a suitable sealant used.
Note: New setscrews have sealant applied by the manufacturer to the first 13,0 mm (0.50 in) of the threads.
If the setscrews are to be used again, clean the old sealant from the male and female threads and apply new
sealant, (Powerpart Threadlock and Nutlock) to the setscrews.
Recommended torque tensions
Most of the torques on the engine are standard. Torques specific to individual operations are listed in the
relevant operation. The standard torques listed in the tables below can be used when a specific torque is not
necessary.
Note: The torques below apply to components lubricated lightly with clean engine oil before they are fitted.
Standard torques for setscrews, studs and nuts
Examples of applicable material
Thread
size
Bolt
Strength
Coarse Screw Thread Fine Screw Thread
Pitch
(mm)
Torque
(Nm)
Torque
(lbf ft)
Torque
(kgf m)
Pitch
(mm)
Torque
(Nm)
Torque
(lbf ft)
Torque
(kgf m)
M4
8.8
11T
0,7
3
4
2
3
0,3
0,4
M5
8.8
11T
0,8
6
8
4
6
0,6
0,8
M6
8.8
11T
1,0
10
14
7
10
1,0
1,4
M8
8.8
11T
1,25
26
32
19
24
2,7
3,3
1,0
30
35
22
26
3,0
3,6
M10
8.8
11T
1,5
50
62
37
46
5,1
6,3
1,25
56
66
41
49
5,7
6,7
M12
8.8
11T
1,75
75
104
55
77
7,6
10,6
1,25
84
113
62
83
8,6
11,5
M14
8.8
11T
2,0
118
157
87
116
12,0
16,0
1,5
132
167
97
123
13,5
17,0
M16
8.8
11T
2,0
167
230
123
170
17,0
23,4
1,5
175
245
129
181
17,8
20,5
Bolt
Strength
Example
8.8
11T
S45C
SCM435
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