Special Torque Chart - Yanmar BY Series Service Manual

ENGINE

SPECIAL TORQUE CHART

System
Main Bearing
Replace, wash and oil
Coolant Drain Plug to
Crankcase
Engine Block
Clamping and Guide Rails to
Crankcase
Engine Mount Nut
Torsional Vibration Damper
to Crankshaft
Torsion Damper
Connecting Rod Bolts
Connecting Rod and
Replace, wash and oil
Bearing
Cylinder Head Bolts
Replace, wash and oil
Cylinder Head with
Cover
Seal Plug
Replace screws
Sprocket to Camshaft
Camshaft
Camshaft Bearing Cap Bolt
Oil Drain Plug
Oil Sump to Crankcase
Oil Sump
Oil Deflector to Crankcase
Lower Section
Timing Case Cover Bolt
Guide Rail Pin
Timing Case Covers
Plug to Timing Case Cover
Plug to Timing Case Cover
5-8
Component Model
4BY2
6BY2
4BY2
6B2Y
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
6BY2
6BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
4BY2
6BY2
© 2009 Yanmar Marine International
Thread Comments
M10 x 80 Initial Torque
Steel Bolts Torque Angle
Replace Sealing Ring
M14 x 1.5
Torque
M14
Torque
M20
Initial Torque
1st Torque Angle
M18 x 1.5
2nd Torque Angle
3rd Torque Angle
Initial Torque
M10 x 86 1st Torque Angle
2nd Torque Angle
Assembly Torque
M10 x 80
Initial Torque
Grade 12.9
Torque angle
Initial Torque then
Loosen all bolts 180°
M12 x 1.5 2nd Torque
1st Torque Angle
2nd Torque Angle
-
M14 x 1.5
-
M7 x 19
-
-
M12 x 1.5 Replace Seal
M8 x 26 -
Thread-Tapping Screw
M6 x 16
Initial Torque of 5 N·m
-
(44 in.-lb)
Apply Medium
Strength Thread Lock
-
and Sealer to the
Threads
Replace Seal
M30 x 1
Replace Seal
M40 x 1.5
BY Service Manual

Special Torque Chart

Specification
23 N·m (204 in.-lb)
Plus 90°
25 N·m (221 in.-lb)
20 N·m (177 in.-lb)
300 N·m (221 ft-lb)
100 N·m (74 ft-lb)
60°
60°
30°
40 N·m (30 ft-lb)
60°
60°
5 N·m (44 in.-lb)
20 N·m (177 in.-lb)
70°
80 N·m (59 ft-lb)
50 N·m (37 ft-lb)
90°
90°
30 N·m (22 ft-lb)
15 N·m (133 in.-lb)
10 N·m (89 in.-lb)
25 N·m (221 in.-lb)
20 N·m (177 in.-lb)
10 N·m (89 in.-lb)
14 N·m (124 in.-lb)
20 N·m (177 in.-lb)
70 N·m (52 ft-lb)
30 N·m (22 ft-lb)