BMW K 1100 LT/RS User Manual

11.40

Measuring big end bearing play

•

Turn the crankpin 30° away from bottom dead 
centre.

•

Wipe oil off crankpin and bearing cap.

•

Place Plastigage strip (arrow), Type PG-1,
BMW  No. 00 2 590, over the entire width of the 
bearing, 6…8 mm (0.24…0.32 in) away from the 
centre of the crankpin.

•

Attach the bearing caps with the joint lines 
aligned, and tighten them.

X 

Big end bearings .......................................... 30 Nm

L

The crankshaft must not be turned any more at this 
stage.

•

Tighten the big end bearings with wrench angle 
indicator (1), BMW No. 11 2 210.

X 

Wrench angle   .................................................. 80°

•

Unscrew and remove the bearing cap.

•

Determine bearing play against comparison 
scale (arrow).

Bearing
play ............. 0.030…0.066 mm (0.0012…0.0026 in)
Wear limit .............................. 0.130 mm (0.0051 in)

•

If bearing shells are renewed, note paint marks 
on crankpin and on big end bearing.

•

Regrinding stages “0” and “1” are available; the 
crankpins are marked with a corresponding 
number of paint spots.

•

If there are no paint spots, this indicates regrind-
ing stage “0”.

L

The crankshaft can only be reground in stage “0”, 
and must be hardened and finished afterwards.

Installing big end bearing

•

Move the crankpin of the cylinder concerned to 
bottom dead centre.

•

Oil the crankpin and attach the conrod.

•

Pull the protective tubes off the bolts.

•

Attach the bearing caps with the joint lines 
aligned, and tighten them.

X 

Big end bearings .......................................... 30 Nm

•

Using wrench angle indicator,
BMW No. 11 2 500, tighten the big end bearing.

X 

Wrench angle .................................................... 80°

LT110610

LT110620

LT110630