BMW Motorcycle (R1100RT, R1100RS, R850/1100GS, R850/1100R). Manual - part 17

11.84

•

Bolt the crankcase sections together.

Tightening torque/tightening sequence:
1. M10 screw (oiled) ..................................... 45 Nm
2. M 8 screw (oiled) ...................................... 20 Nm
3. M 6 screw .................................................. 9 Nm

M1

0x

1

0

0

M8

x

8

0

M8

x

3

5

M1

0x

1

0

0

M8x

8

0

M8

x

3

5

RS110391

11.85

Installing radial seal on crankshaft

•

Pre-form the lip of the radial shaft seal carefuilly 
by hand (1).

•

Oil the radial shaft seal at the sealing/contact 
surface.

•

Place radial seal over sliding sleeve (2)/remove 
sliding sleeve (3).

•

Drive radial shaft seal in with handle, 
BMW No. 00 0 500, and drift with sliding sleeve, 
BMW No. 11 5 660 (4).

2

3

4

1

11 5 660

RS110400

11.86

Installing clutch housing

e

 Caution:

Always use new bolts for housing and cover.

•

Install clutch housing with mark (1) aligned with 
crankshaft mark (2).

•

Lock clutch housing with retaining device, 
BMW No. 11 5 640. 

•

Insert all screws by hand and tighten down.

X

 Tightening torque:

Clutch housing to crankshaft 
(screw threads oiled) .................................... 40 Nm 
Additional wrench angle .................................... 32°

1

2

11 5 640

RS210011

11.87

Installing oil pump

e

 Caution:

Oil the sliding-contact faces.

•

Install outer rotor (1) of oil pump in pump 
houssing.

•

Install oil pump housing with cooling oil pipe (2).

e

 Caution:

O-ring (3) must be in good condition.

•

Install Woodruff key (4), outer rotor (5) and inner 
rotor (6) in cooling oil pump.

•

Screw housing cover (7) on to oil pump.

e

 Caution:

Note: different lengths of screw.

X

 Tightening torque:

M 6 screw ...................................................... 9 Nm
Pressure relief valve ..................................... 35 Nm
Oil pressure switch....................................... 30 Nm

1

2

3

5

6

7

4

M6 x 45

M6 x 45

M6 x 45

M6 x 50

M6 x 50

RS110411

11.88

Installing auxiliary shaft drive

•

Set crankshaft mark against mark on auxiliary 
shaft.

e

 Caution:

Perform the work in accordance with the adjustment 
specification

a

 See Installing cylinder head.

•

Lock clutch housing with retaining device, 
BMW No. 11 5 640.

•

Install chain sprocket (1).

X

 Tightening torque:

M 6 screw .................................................... 10 Nm

•

Install drive-shaft chain with chainwheel (2) and 
rotor (3).

X

 Tightening torque:

Retaining screw at chainwheel ..................... 70 Nm

•

Install/secure chain guide rail (4).

•

Install/secure chain tensioner rail (5).

•

Install chain tensioner housing (6) with piston and 
spring.

X

 Tightening torque:

M 6 screw ...................................................... 9 Nm

•

Tighten down cooling oil line (7).

e

 Caution:

Use a new sealing ring.

X

 Tightening torque:

M 6 screw .................................................... 10 Nm
Banjo screw for cooling oil line..................... 25 Nm
Banjo screw for cooling oil line
with oil vent valve ......................................... 25 Nm

1

2

4

5

6

7

11 5 640

3

RS110250

11.89

Installing pistons

•

Turn joint in oil scraper ring (arrow) so that it 
faces upwards.

•

Install piston ring gap offset by 120°

 

in each 

case.

Production locating point X = install on exhaust side.

e

 Caution:

Ensure that retaining rings are properly seated on 
piston pin. Oil the sliding-contact faces. Always use 
pistons of the same weight class in any one engine.

Markings: .................................................... + or —

a

See Technical Data

e

 Caution:

Always install pistons and cylinders in pairs. Do not 
accidentally confuse pistons or piston pins

Piston size identificatio
On piston crown A, B, AB (for either A or B cylinder), 
and on cylinder A, B

X

RS110430

11.90

Installing cylinders

•

Apply 3-Bond 1209 to the cylinder base sealing 
face, which must be clean and free from grease.

•

Oil the cylinder wall.

•

Using piston ring clamp strap, 
BMW No. 11 2 900/11 2 905, compress the pis-
ton rings.

•

Install the cylinder and at the same time pass the 
timing chain and the tensioning and guide rail 
through the timing case cavity.

•

Tighten cylinder down firmly.

•

Fit new seal to pivot pin for chain guide rail (1).

•

Install chain sprocket.

Tightening torque/tightening sequence:
1. M 8 screw ................................................ 20 Nm
2. M 6 screw .................................................. 9 Nm
3. Pivot screw for chain guide rail.................... 18 Nm

u

11 2 900

1

RS110420

11.91

Installing cylinder head

•

Install cylinder head gasket.

•

Fit cylinder head/insert correctly positioned cam-
shaft chain sprocket (1) and timing chain into 
chain cavity.

•

Install valve gear support (2).

•

Tighten cylinder head down.

e

 Caution:

Install collar (arrow) of cylinder head nut towards cyl-
inder head.

Tightening torque/tightening sequence:
1. Tighten cylinder head nuts (oiled) crosswise
1.1Tighten all nuts........................................ 20 Nm
1.2Tighten all nuts to correct angle ................... 90°
1.3Tighten all nuts to correct angle ................... 90°
2. M 10 screw ............................................. 40 Nm
3. M 6 screw ................................................. 9 Nm

X

 Tightening torque:

take up slack after 1000 km (app. 600 miles)
Tighten cylinder head nuts crosswise
1. Unfasten one nut
2. Tighten one nut to initial value ................. 20 Nm
3. Tighten nut to wrench angle ......................  180°
4. Unfasten/retighten M10 screw ................ 40 Nm

•

Fit camshaft chain sprocket in accordance with 
adjustment specification.

•

Lock clutch housing with retaining device, 
BMW No. 11 5 640.

•

Tighten camshaft chain sprocket.

X

 Tightening torque:

Camshaft sprocket retaining screw .............. 65 Nm

•

Insert the left-side camshaft sprocket with pin 
into the camshaft and set the left cylinder to TDC 
on the ignition stroke.

•

Fit camshaft chain sprocket in accordance with 
adjustment specification.

•

Tighten camshaft chain sprocket.

•

Install chain tensioner.

•

Check that marks on camshaft sprockets are in 
accordance with adjustment specification. 

X

 Tightening torque:

Chain tensioner ............................................ 32 Nm

1

2

M6 x 30

M6 x 30

M6 x 30

M6 x 60

RS110930