Torque B18/B20/B30

Main bearing cap

13mm bolt 12-13kpm

12mm bolt (from 74 and up) 11kpm

Connecting rod cap

6-bolt -73 (3/8) 5,5kpm

8-bolt 74- (M10) 7kpm

Camshaft nut

Max 8kpm (with strong loctite)

Pulley

B18/B20 Early model (9/16) 7-8kpm

B20 Late model  (M14) 9,5-10,5kpm

B20/B30 2/3 tracked pulley 12-14kpm

Flywheel

6-bolt (3/8) 5,5kpm

8-bolt (M10) 7kpm

Pressure plate
6-Bolt (5/16) 2.2-2.3kpm
8-Bolt (M8 / 12.9) 4kpm
8-Bolt (M8 / 8,8) 2,5kpm

Spark plug

4,5kpm

Cylinder head

9,5kpm

Torque B19/B21/B23

Main bearing cap 11kpm

Connecting rod cap 7kpm

Camshaft pulley/aggregate shaft 5kpm

Pulley 15kpm

Flywheel 7kpm

Pressure plate (M8 / 12.9) 4kpm (only 16mm long bolt)
Pressure plate (M8 / 8.8) 2.5kpm (only 16mm long bolt)

Spark plug 3kpm

Cylinder head Standard bolt 10kpm (may vary depending on version) (See also workshop manual)
Cylinder head tension bolt is drawn in 3 stages. 1 = 2kpm / 2 = 6kpm / 3 = angled 90 degrees in one step

Camshaft cap 2kpm

Torque B200/B230

Main bearing cap 11kpm

Connecting rod cap 2kpm then angled 90 degrees

Camshaft pulley/aggregate shaft 5kpm

Pulley 6kpm then angled 60 degrees

Flywheel 7kpm

Pressure plate (M8 / 12.9) 4kpm (only 16mm long bolt)
Pressure plate (M8 / 8.8) 2.5kpm (only 16mm long bolt)

Spark plug 3kpm

Cylinder head Standard bolt 10kpm (may vary depending on version) (See also workshop manual)
Cylinder head tension bolt is drawn in 3 stages. 1 = 2kpm / 2 = 6kpm / 3 = angled 90 degrees in one step

Camshaft cap 2kpm

Piston oil cooling nozzles 2.5kpm + one drop of medium thread lock


ARP

When mounting the ARP crankshaft bolt, ARP grease is applied to the thread and installation surface for the bolt shell.

When using ARP top bolt / stud bolt, ARP grease should be used.

Note that the grease should only be applied to the bolt shell / nut and the corresponding side of the washer, and of course on the threads.

The side of the washer facing the cylinder head should be free of grease.

Otherwise, an excessive torque occurs on the bolt / screw.

One can usefully roughen the side of the tray located on the top cover with a coarse sandpaper.

When mounting the ARP crankshaft bolt, ARP grease is applied to the thread and installation surface for the bolt shell.


Table for general screw and bolt

Tightening torque is stated in NM