Yanmar 6BY2 - Page 71

ENGINE
Special Torque Chart
12/05
BY Service Manual
5-9
© 2009 Yanmar Marine International
Crankshaft and
Bearings
Main Bearing Cap
Replace Bolts
Lightly oil threads
4BY2
6BY2
M10 x 80
Grade 12.9
PHR
Initial Torque
Torque Angle
22 N·m (195 in.-lb)
Plus 90°
Oil Pump
Oil Pick-Up to Oil Pump 4BY2
6BY2
M6 x 20
-
10 N·m (89 in.-lb)
Reinforcement Shell 4BY2
6BY2
M6 x 16
-
10 N·m (89 in.-lb)
Oil Filter
Oil Filter Cap to Oil Filter
Housing
4BY2
6BY2
-
-
25 N·m (221 in.-lb)
Thermostat and
Connections
Coolant Return to Cylinder
Head and Oil Filter Housing
4BY2
6BY2
M8 x 18
-
10 N·m (89 in.-lb)
Air Intake
Intake Manifold to Cylinder
Head
4BY2
6BY2
M7 x 50
-
15 N·m (133 in.-lb)
Exhaust
Turbocharger to Exhaust
Manifold
4BY2
6BY2
-
Apply Copper
Anti-seize to Threads
23 N·m (204 in.-lb)
Turbocharger Oil Supply Line 4BY2
6BY2
M10
Replace Banjo Bolt
and Sealing Rings
22 N·m (195 in.-lb)
Turbocharger Oil Return to
Crankcase
4BY2
6BY2
-
Hose Clamp
3 N·m (27 in.-lb)
Exhaust Manifold to Cylinder
Head
4BY2 - Apply Copper
Anti-seize to Threads
19 N·m (168 in.-lb)
6BY2 - 13 N·m (115 in.-lb)
Alternator
Wires to Alternator 4BY2 M8 - 13 N·m (115 in.-lb)
Alternator to Crankcase 4BY2 M10 - 38 N·m (28 ft-lb)
Belt Pulley with Free Wheel 4BY2 - - 80 N·m (59 ft-lb)
Electrical System
Engine Wiring
Harness
Wiring Harness to Ground
Holder
4BY2 M6
-
7 N·m (62 in.-lb)
DDE Wiring
Harness Pick Up to
Battery Positive
Terminal
4BY2
6BY2
M6
-
9 N·m (80 in.-lb)
Injector Guide
Strip to Cylinder
Head Cover
4BY2
6BY2
-
-
3.5 N·m (31 in.-lb)
Coolant Sensor to Cylinder
Head
4BY2
6BY2
-
-
13.4 N·m (119 in.-lb)
Camshaft Position Sensor
Pickup
4BY2
6BY2
-
-
2.3 N·m (20 in.-lb)
Fuel System
Injection Pump Drive
Sprocket to High-Pressure
Pump
4BY2
6BY2
M14 x 1.5
-
65 N·m (48 ft-lb)
Fuel Measuring Valve to
High-Pressure Pump
4BY2
6BY2
M5 x 20
-
6.6 N·m (58 in.-lb)
System Component Model Thread Comments Specification