Tightening Torques

Tightening torques - MA.101 and MA.102














Information

Crankcase





Crankcase 9A1

1 - Crankcase
2 - Dowel sleeve
3 - Lid
4 - O-ring
5(1) - Stud, micro-self-locking (use Loctite 243 and leave to harden for at least 3 hours). -> Tightening torque: 5 Nm (3.5 ftlb.)
6 - Screw plug -> Tightening torque: 80 Nm (59 ftlb.)
7 - Sealing ring
8 - Dowel sleeve
9 - Torx screw (tighten torque angle in 2 stages) -> Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 12 Nm (9 ftlb.) -> Tightening torque: 15 Nm (11 ftlb.) -> Torque angle: 75 degrees -> Torque angle: 75 degrees
10 - Torx screw -> Tightening torque: 33 Nm (24 ftlb.)
11 - Torx screw -> Tightening torque: 13 Nm (9.5 ftlb.)
12 - Torx screw -> Tightening torque: 13 Nm (9.5 ftlb.)
13 - Torx screw -> Tightening torque: 13 Nm (9.5 ftlb.)
14(1) - Stud (use Loctite and leave to harden for at least 1 hour) -> Tightening torque: 5 Nm (3.5 ftlb.)
15 - Lid
16 - Speed sensor
17 - Fastening screw for speed sensor -> Tightening torque: 10 Nm (7.5 ftlb.)
18 - Knock sensor -> Tightening torque: 23 Nm (17 ftlb.)
19 - Fastening screw securing knock sensor
29 - Transport eyebolt
21 - Torx screw -> Tightening torque: 13 Nm (9.5 ftlb.)

1) If the threaded bolt unscrews: Clean the thread. Check that it is free of grease and oil and is completely dry. Apply a 2-mm coating of Loctite 243 all the way around on the first thread of the crankcase bore. Observe the specified hardening time.





Tightening sequence for crankcase screws

Information

Crank drive, pistons





Connecting rod bolts

1 - Connecting rod bolts -> Initial tightening: 20 Nm (15 ftlb.) -> Torque angle: 80 degrees





Belt drive

1 - Torx screw for unit carrier -> Tightening torque: 33 Nm (24 ftlb.)
2 - Torx screw for unit carrier -> Tightening torque: 33 Nm (24 ftlb.)
3 - Torx screw for unit carrier -> Tightening torque: 33 Nm (24 ftlb.)
4 - Countersunk screw -> Tightening torque: 23 Nm (17 ftlb.)
5 - Countersunk screw -> Tightening torque: 23 Nm (17 ftlb.)

Information

Cylinder head, valve drive





Cylinder head screws

1 - Cylinder head screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Cylinder head screw -> Tightening torque: 13 Nm (9.5 ftlb.)
3 - Cylinder head screw Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 50 Nm (37 ftlb.) Loosen all screws and then tighten them again -> Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 12 Nm (9 ftlb.) -> Torque angle: 60 degrees -> Torque angle: 60 degrees
4 - Cylinder head screw -> Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 50 Nm (37 ftlb.) Loosen all screws and then tighten them again -> Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 12 Nm (9 ftlb.) -> Torque angle: 60 degrees -> Torque angle: 60 degrees





Tightening sequence for cylinder head screws





Camshaft bearing covers

1 - Observe tightening sequence for fastening screw on bearing cover -> Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 5 Nm (3.5 ftlb.) -> Torque angle: 50 degrees
2 - Camshaft bearing cover
3 - Dowel sleeve
4 - Bearing saddle
5 - Fastening screw Initial tightening: 5 Nm (3.5 ftlb.) -> Tightening torque: 5 Nm (3.5 ftlb.) -> Torque angle: 50 degrees





Tightening sequence for camshaft bearing cover





Fastening screws for camshaft controller/sprocket

1 - Fastening screw for camshaft controller -> Tightening torque: 35 Nm (26 ftlb.) -> Torque angle: 120 degrees
2 - Fastening screws for camshaft timing gear -> Tightening torque: 30 Nm (22 ftlb.) -> Torque angle: 70 degrees





Cylinder head cover

1 bis 20 - Tighten screws 1 to 4 a second time -> Tightening torque: 13 Nm (9.5 ftlb.)





Spacer

1 - Spacer
2 - Torx screw -> Tightening torque: 13 Nm (9.5 ftlb.)
3 - Screw plug for secondary air duct -> Tightening torque: 25 Nm (19 ftlb.)
4 - Scavenging restrictor -> Tightening torque: 3 Nm (2 ftlb.)

Information

Lubrication





Oil pump

1 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Cap screw -> Tightening torque: 40 Nm (30 ftlb.)
3 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
4 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
5 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
6 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
7 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)





Oil pan

1 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
3 - Screw plug -> Tightening torque: 50 Nm (37 ftlb.)





Tightening sequence for upper part of oil pan

1-21 - Tightening sequence for screws in upper part of oil pan





Tightening sequence for lower part of oil pan

1-21 - Tightening sequence for lower part of oil pan





Oil module

1 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
3 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
4 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
5 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
6 - Lid -> Tightening torque: 25 Nm (19 ftlb.)
7 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)

Information

Cooling





Thermostat

1 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Screw plug for coolant pump
3 - Fastening screw for water guide -> Tightening torque: 13 Nm (9.5 ftlb.)
4 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
5 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
6 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)





Coolant pump

1 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
2 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
3 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
4 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
5 - Fastening screw -> Tightening torque: 13 Nm (9.5 ftlb.)
6 - Fastening screw -> Tightening torque: 23 Nm (17 ftlb.)





Tightening specifications (view of 3.8-liter engine)

Intake-air distributor to cylinder head
External Torx screw, M6 x 35
Tightening torque 13 Nm (9.5 ftlb.)

Exhaust manifold to cylinder head M8 x 21
From the inside out
Tightening torque 23 Nm (17 ftlb.)

Flywheel to crankshaft M10 x 29 - always replace screws
Tighten fastening screws evenly and crosswise to the prescribed tightening torque.
Initial tightening 25 Nm (19 ftlb.)
Final tightening - torque angle 120°