23 00 017 Removing and installing transmission (GS6-17BG) N52K
Use only the approved transmission fluid. See MANUAL TRANSMISSION - OPERATING FLUIDS .
Failure to comply with this requirement will result in serious damage to the manual transmission.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminum screws/bolts exclusively.
Aluminum screws/bolts must be replaced each time they are released .
Aluminum screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminum screws/bolts are not magnetic .
Jointing torque and angle of rotation must be observed without fail (risk of damage) .
Necessary preliminary tasks
- Clamp off BATTERY
- Remove UNDERBODY PROTECTION
- Remove complete exhaust system . See EXHAUST SYSTEM - REPAIR (N52)
- Remove heat shields
- Support engine
Release screws (1).
Remove exhaust system bracket (2).
Tightening torque 23 00 1AZ .
Remove holder (1).
Disconnect connector (1).
Unfasten screws (2).
Release screw (3) on grounding strap
Remove holder (4).
Tightening torque 23 00 1AZ .
Unclip cable (1) from holder.
Unfasten screws (2).
Remove bracket (3).
Detach plug (1) from reverse gear switch.
Detach cables from fixtures on transmission.
Supporting transmission
Support transmission with special tools 23 4 050 .
Secure transmission to mounting with tensioning strap (1).
Tasks are described in Universal BMW transmission take-up .
After completion of work, check transmission oil level.
Remove screws and nuts.
Unscrew cross member.
Tightening torque 23 71 1AZ/2AZ .
Remove PROPELLER SHAFT
Release nuts (2) and remove clutch slave cylinder (1).
Tightening torque 21 52 5AZ .
Detach locking clip.
Retaining clip must interlock captively with retaining web (1) behind shift rod pin.
Pull shift rod (1) out of shift rod joint (2).
Installation:
Grease shift rod pin (3).
Grease, refer to OPERATING FLUIDS .
Unlock bearing pin (1) in direction of arrow and remove.
Lift out shift arm (1).
Installation:
Grease bearing pin.
Grease, refer to OPERATING FLUIDS .
Release screws.
Installation:
Tightening torque, steel screws 23 00 1AZ .
Aluminum screws must be replaced.
Tightening torque and angle of rotation
Aluminum screws/bolts 23 00 2AZ .
Installation:
Tighten down screws/bolts to specified torque.
Secure special tool and angle of rotation 00 9 120 with magnet 00 9 130 to floor plate.
Screw down aluminum screws/bolts further according to angle of rotation.
Angle of rotation 23 00 2AZ .
Installation
Check dowel sleeves (1 and 2) for correct seating.
Replace damaged sleeves.
Ensure correct position of cover plate.
Installation
Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and REPLACE CLUTCH PLATE .
Check clutch plate for friction rust in splines and REPLACE IF NECESSARY .
Remove any grease and lining abrasion from splines of clutch plate by mechanical means (with a cloth).
Installation:
Greasing specification:
- Remove and clean release bearing and release lever (do not grease).
- Push on grease scraper ring 21 2 220 as far as it will go.
- Grease splines (1) of input shaft with a brush.
- Refer to OPERATING FLUIDS
- Detach grease scraper ring.