Installing Piston With Conrod; Installing Big End Bearings; Measuring Big End Bearing Play - BMW k 1200 rs Repair Manual

Installing piston with conrod

1100
•
Turn the relevant crankpin to bottom dead
centre.
•
Make sure all pistons and conrods are of the
same weight classes (
a
e
Important:
Note the pin for the 2nd piston ring gap.
•
Space the piston ring gaps at approx. 120° off-
sets.
•
Thoroughly oil the piston rings, piston skirt and
cylinder wall.
•
Insert the piston into the sliding sleeve,
BMW No. 11 6 700.
•
The arrow on the piston crown must point to-
wards the timing end of the engine (cylinder 1).
•
Insert the piston with conrod into the cylinder un-
til the sliding sleeve is touching the crankcase.
•
Carefully push the piston by hand out of the
sleeve and into the cylinder.

Installing big end bearings

1100
e
Important:
Do not accidentally interchange conrods or bearing
shells. Take great care to reinstall the bearing shells
in their original positions. Always use new big end
bolts.
•
Turn the crankpin of the relevant cylinder to bot-
tom dead centre.
•
Oil the crankpin and seat the conrod against it.
•
11.25).
•
X
Split conrod bearings ................................... 20 Nm
Additional angle of rotation................................ 80°
1100
•
•
•
Place the big-end bearing cap in position and
tighten the screws to the specified torque.
11 2 500
Use an angle-of-rotation gauge,
BMW No. 11 2 500, to tighten the big end bear-
ings.
Tightening torque:

Measuring big end bearing play

Unscrew and remove the bearing cap and clean
the crankpin and bearing cap to remove oil.
Measure bearing play with Plastigage,
BMW No. 00 2 590.
Place the Plastigage strip (arrow) over the entire
bearing width and 6 to 8 mm
(0.2362 to 0.3150 in) away from the centre of the
crankpin.
KR110620
KL110180
11.41