Removing And Installing Or Replacing Water Pump; Replacing Shaft Sealing Rings - BMW C1 Repair Manual

Removing and installing or replacing
water pump
– Drain coolant.
•
Slip a length of hose (fuel line or similar) over
screw and tool and release the fastener.
•
Open radiator cap and remove fastener.
– Remove magnetic wheel.
•
Remove circlip and washer (arrow).
•
Press water pump gear out of fit of needle roller.
•
Remove needle roller and washer.
•
Remove screw.
L
Note:
Working from left side of engine, slide a plastic rod
into the water pipe and use it to remove the pump
shaft.
e
Caution:
Do not use a metal rod, as it would damage the wa-
ter pump gear.
•
Remove pump housing.
e
Caution:
Reinstalling a damaged water-pump shaft can result
in leakage.
•
Remove O-rings.
•
Check contact zones of the two sealing rings on
the water pump shaft for tracks, damage and
wear.
Wear values:
Housing inside diameter.......... 10.08 mm (0.397 in)
•
Check water pump impeller for damage and de-
formation.

Replacing shaft sealing rings

C1110280
11 7 611
•
Use a screwdriver to remove sealing rings from
housing.
L
Note:
Before installing, coat outside of shaft sealing rings
C1110310
with paraffin oil spirit; do not oil.
e
Caution:
Install shaft sealing rings with flats facing each other.
•
Use drift, BMW No. 11 7 611, and spacing ring
to install first sealing ring.
•
Install second sealing ring without spacing ring.
L
Note:
Make sure that the bore for leak-off water is not ob-
structed.
C1110320
11.31