Removing and Installing Transmission (GS6-17BG) N52K/N53
23 00 017 - Removing and installing transmission (GS6-17BG) N52K/N53
Special tools required:
- 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit
- 00 9 010 00 9 010 Torx E18 Socket
- 00 9 120 00 9 120 Torque Angle Measuring Dial
- 00 9 130 00 9 130 Magnet with 1/2 " Connection
- 21 2 220 21 2 220 Grease Scraper Ring
- 23 4 050 23 4 050 Universal Transmission Bracket
Important!
After completion of work, check gear oil level Procedures.
Use only the approved gear oil.
Failure to comply with this requirement will result in serious damage to the manual transmission.
Important!
Aluminium-magnesium materials.
No steel screws/bolts may be used due to the threat of electrochemical corrosion.
A magnesium crankcase requires aluminium screws/bolts exclusively.
Aluminium screws/bolts must be replaced each time they are released.
Aluminium screws/bolts are permitted with and without color coding (blue).
For reliable identification:
Aluminium 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 Instructions for Disconnecting and Connecting Battery
- Remove underbody protection and bracket at front and rear
- Remove reinforcement plate Service and Repair
Important notes on installation are described in this work step
- Remove complete exhaust system Service and Repair
Remove heat shields (1) and (2).
Disconnect plug connector (1).
Unfasten screws (2).
Remove cover plate (3).
Unscrew holder (4).
Tightening torque 23 00 1AZ Transmission in General.
Installation Note:
Release aluminium screw on right next to cable retaining plate with special tool 00 9 010 00 9 010 Torx E18 Socket.
Aluminium screws must be replaced.
Tightening torque 23 00 2AZ Transmission in General.
Note:
N53 only
Detach cable from bracket (1).
Detach plug (1) from reversing light switch.
Release cable from retainers.
Supporting transmission:
Support transmission with special tools 23 4 050 23 4 050 Universal Transmission Bracket, 00 2 030 00 2 030 Universal Hydro-Lifter Basic Unit.
Secure transmission to mounting with tensioning strap (1).
Tasks are described in Transmission bracket Universal BMW Transmission Take-Up.
After completion of work, check transmission oil level.
Remove transmission cross-member Replacing Cross-Member for Transmission Mounting.
Release screws (1).
Remove exhaust system bracket (2).
Tightening torque 23 71 4AZ. 23 71 Transmission Mounts
Release screws.
Remove transmission bearing block (1).
Tightening torque 23 71 4AZ 23 71 Transmission Mounts.
- Support engine.
- Remove propeller shaft from transmission.
- Release center bearing.
- Tie propeller shaft to one side.
Tasks are described in Removing propeller shaft Removing and Installing Complete Propeller Shaft (Constant-Velocity Joint).
Lift off retainer (1).
Disconnect shift rod (2).
Installation Note:
Grease shift rod.
Grease, refer to BMW Service Operating Fluids.
Make sure shims (3) are in correct position.
Release and remove bearing pins (1) in direction of arrow.
Lift out shift arm (1).
Installation Note:
Grease bearing pins (1).
Grease, refer to BMW Service Operating Fluids.
Note:
Pressure line of clutch slave cylinder remains connected.
Important!
Slowly relieve tension on clutch slave cylinder otherwise air is drawn in through sealing sleeve.
Release nuts (2) and remove clutch slave cylinder (1).
Tightening torque 21 52 5AZ [1][2]Clutch Hydraulic System.
Release screws.
Installation Note:
Observe screw fastening sequence without fail.
Tightening torque, steel screws 23 00 1AZ Transmission in General.
Aluminium screws/bolts must be replaced.
Tightening torque and angle of rotation
Aluminium screws/bolts 23 00 2AZ Transmission in General.
Important!
Do not allow the transmission to hang off from the transmission input shaft as this will deform the clutch plate. Pull out transmission towards rear and remove.
Installation Note:
Secure angle of rotation special tool 00 9 120 00 9 120 Torque Angle Measuring Dial with magnet 00 9 130 00 9 130 Magnet with 1/2 " Connection to floor plate. Screw down aluminium screws/bolts according to angle of rotation.
Angle of rotation 23 00 2AZ Transmission in General.
Installation Note:
Check that dowel sleeves are correctly seated.
Replace damaged dowel sleeves.
Ensure correct position of cover plate.
Installation Note:
Check lubrication of transmission input shaft for sticky consistency. If grease is sticky, clean input shaft and replace clutch plate Service and Repair.
Check clutch plate for friction rust in splines and replace Service and Repair if necessary.
Mechanically remove existing grease and lining abrasion from splines of clutch plate (with a cloth).
Installation Note:
Greasing specification:
- Remove and clean release bearing and release lever Service and Repair.
- Push on grease scraper ring 21 2 220 21 2 220 Grease Scraper Ring as far as it will go.
- Grease splines (1) of input shaft with a brush. Refer to BMW Service Operating Fluids.
- Detach grease scraper ring.