BMW 5251 Service Manual page 557

21 0-1 5
Clutch
Use crankshaft pulley bolt to rotate engine in direction of ro-
tation until a full pulse tooth (arrow) is centered in pulse sen-
sor opening.
Measure depth from pulse sensor mounting surface on trans-
mission to top of tooth.
Q
Measure length (A) of pulse sensor from mounting surface to
end.
-
Subtract length of pulse sensor (A) from distance to pulse
tooth from mounting area on transmission. This resulting
measurement is the pulse sensor air gap. Use shims avail-
able from BMW to adjust air gap to specification.
Pulse
air
sensor gap
End of
sensor to flywheel teeth
0.55 i-0.2
rnrn
(0.0217 i0.0079
in)
Transmission input shaft pilot bearing,
replacing
-
Remove clutch as described earlier.
4
Remove pilot bearing from end of crankshaft using BMW
special tool 11 2 340 or equivalent puller.