Westerbeke 4.5 BCG - Torque Specifications; Cylinder Head Bolt Torque; Standard Hardware Tightening Torques

TORQUE SPECIFICATIONS
Cylinder Head Bolts*
36.2-43.4
5.0-6.0
(*See the Torquing. Cylinder Head Bolts section)
Crankshaft pulley to crankshaft
36.2-43.4
5.0-6.0
Rocker cover to cylinder block
2.9-5.1.
0.4-0.7
Spark plug to cylinder head
10.8-15.2
1.5-2.1
Timing belt cover #1
3.2-4.8
0.44-0.66
Timing belt cover #2
5.2-7.8
0.72-1.0?
Timing belt tensioner
23.1-34.7
3.2-4.8
Valve adjusting screws
9.4-13.0
1.3 -1.8
Oil pan drain plUg and oil pan
25.3-32.5
3.5-4.5
Flywheel· bolts 28.9-36.2
4.0-5.0
Exhaust manifOld
8.4-12.6
1.16-1.74
Intake mariifOld
7.5~ 10.8 1.04-1.56
TABLE OF STANDARD HARDWARE TIGHTENING TORQUES
Unless stated otherwise tor a specific assembly, use the following torque values when tightening standard
hardware.
Pitch
lb-ft
kg-m
Grade4T
Gm.d~ 7T. ST And a.a
6rnm bOlt head/nut. 2.9-
5.1
0.4- 0.7
6mm bolt hea(l/lllJt
1
5.8-
8.7 0.8- 1.2
amm bolt head/nut
1.25
7.2
- 11.6
1.0
- 1.6
Smm bolt head/nut
1..25
14;5 - 21.7
2.0- 3.0
10mm
bolt head/nut
.. 1.25
13.7- 22.4
1.9- 3.1
1omm
bolt head/nut
1.2$
28,9- 39,8
4;0. 5.5
1 Omm .bolt head/nut
1.5
13.0 - 21.7
1.8- 3.0
1omm bolt head/nut
1.5
26.8- 37.6 . 3 .. 7- 5.2
12mm
bolt head/nut
. 1.25 (ISO)
25.3. 39.8
3.5- 5.5
12mm bolt head/nut
1.25 (ISO)
54.z •• 15.9
7.5-10.5
12mm bolt head/nut
1.5
25.3- 39,8
3.5· 5.5
12mm bolt head/nut
1.5
50.6-· 65.1
7.0- 9.0
12mrr(.bolt head/nut
1.75
21.7." 36.2
3.0- 5.0
12mm bolt head/nut
1.75
43.4- 61~5
6.0- 8.5
13mm
bOlt head/nut
1.5
32.5-
50.6
4.5- 7.0
13mrn
bolt head/nut
1.5
57~9- 86.8
8.0-12.0
14mm bOlt head/nut
1.5
36.2- 57.9
5.0 - 8.0
14rnm bolt head/nut
1.5
72.3-108.5
10.0-15.0
14mm bolt heao/nut
2
34.0- 55.7 4.7 • 7.7
14mm
bolt head/nut
2
68"7 -101.3
9.5-14.0
16rnm
bolt head/nut
1.5
54.2- 79.6
7.5
·11.0
16rnm
bolt head/nut
1.5
108.5-:166.4
15.0
-23.0
1 amm bolt· heidfnut
2
51.4- 76.7
7.1 -10.6
16mm bolt head/nut
2
101.3 ~159.1
14.0 ·22.0
Gm.Qe6T
~mdi Q {<il~riW
6mm bolt headfnut
,
4,3.
6.5
0.6 - 0.9 1/4UNC
9 •
11 1.2- 1.5
Srnm bolt head/nut
1.25
10.s~ ·1s.9
1.5. 2,2
1/4UNF
11 -
13
1.5- 1.8
1omm ijolt head/nut
1.25
21.7 - :32;5
3.0- 4.5
S/16UNC
18 -
20
2.5- 2.8
10mm bOlt headlnut
1.5·
19.5- 30.4
2.7 • 4.2
5/161.JNF
21 •
23
2.9- 3.2
12mm
bolt head/nut
1.25 (ISO)
36,2- 57.9 s.o- a.o
3/8000
28 -
33 3.7- 4.6
12mm bolt headfnut
1.5
36.2- .50.6
5.0. 7.0
3/8UNF
30 -
35
4.1 - 4.8
12mm
bolt headfnut
1.75
34.7- 49.2
4.8- 6.8
7/16UNC
44 -
49
6.1 - 6.8
7/16UNF
50
-
55
6.9- 7.6
1/2UNC
68 -
73 9.4-10.1
1/2 UNF
73 -
80
10.1 ·11.1
44