11 27 030 Removing and installing/replacing counterbalance shafts (B48, B46)

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2019 MINI Cooper, 2018 MINI Cooper, 2017 MINI Cooper, 2016 MINI Cooper, and 2015 MINI Cooper. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required:

Necessary preliminary tasks:

NOTE: To facilitate disassembly and installation, rotate engine with special tool 00 2 300 to a more convenient working position.

In the following operations, the engine is rotated for 180 degrees. Bottom points upwards.

Removal:

Lever out both sealing caps (1) with screwdriver (2).

Fig 1: Removing Sealing Caps With Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.

Turn the crankshaft to the TDC of the first cylinder.

Mount special tool 2 288 054 and abut screws (1).

Observe installation note in next operation!

Fig 2: Mounting Special Tool (2 288 054) With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Make sure special tool 2 288 054 is properly seated in the guides (1) of the counterbalance shaft (2).

Slightly twist crankshaft if necessary.

Tighten special tool 2 288 054 to 20 Nm.

Fig 3: Tightening Special Tool (2 288 054) On Guides Of Counterbalance Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1).

Fig 4: Counterbalance Shaft Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: The gear is pressed onto the counterbalance shaft with a taper and can only be released with special tool 2 361 286 .

Screw in special tool 2 361 286 into the gear of the counterbalance shaft and secure by means of open-end spanner (1).

Release counterbalance shaft with screw (2) from gear.

Fig 5: Screwing In Special Tool (2 361 286) Into Gear Of Counterbalance Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Risk of damage on crankcase!

Do not under any circumstances drop counterbalance shafts (1) into the bearing positions!

Carefully remove counterbalance shafts (1) from crankcase towards front.

Fig 6: Removing Counterbalance Shafts From Crankcase Towards Front

Courtesy of BMW OF NORTH AMERICA, INC.

Check all needle bearings of the counterbalance shafts.

If necessary, pull off and replace all needle bearing of the counterbalance shafts.

Fig 7: Checking Needle Bearings Of Counterbalance Shafts

Courtesy of BMW OF NORTH AMERICA, INC.

Remove gear (1).

Fig 8: Removing Gear - Intake Side

Courtesy of BMW OF NORTH AMERICA, INC.

Remove gear (1).

Fig 9: Removing Gear - Exhaust Side

Courtesy of BMW OF NORTH AMERICA, INC.

Slacken nut (1).

Fig 10: Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Remove gear (1).

Fig 11: Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Installation:

NOTE: All marks on the gears (1 and 2) and on the intermediate gear wheel (3) must point vertically towards the oil sump sealing surface (upwards).

Mark on gear (1) on intake side: Triangle
Mark on gear (2) on exhaust side: Two rectangles
Mark on the intermediate gear (3) on the exhaust side: One square

Fig 12: Intermediate Gear And Intake/Exhaust Gears

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Replace gear (1).

Install gear (1).

Fig 13: Gear

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten nut (1).

Tightening torque 11 27 2AZ .

Fig 14: Nut

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Risk of mixing up (similar parts) gears!

Gear (1) is marked with an (A) and has to be installed on the exhaust side !

NOTE: Replace gear (1).

Mount gear (1).

Fig 15: Removing Gear - Exhaust Side

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Risk of mixing up (similar parts) gears!

Gear (1) is marked with an (E) and has to be installed on the intake side !

NOTE: Replace gear (1).

Mount gear (1).

Fig 16: Removing Gear - Intake Side

Courtesy of BMW OF NORTH AMERICA, INC.

Attention !

Risk of damage on crankcase!

Do not under any circumstances drop counterbalance shafts (1) into the bearing positions!

Carefully install the counterbalance shafts (1) in the crankcase in the opposite direction of the arrow.

Fig 17: Removing Counterbalance Shafts From Crankcase Towards Front

Courtesy of BMW OF NORTH AMERICA, INC.

Slide special tool 64 1 020 or any other suitable tool through the gear into the counterbalance shaft.

Carefully insert counterbalance shaft (1) into the gear on the intake side.

Fig 18: Inserting Counterbalance Shaft Into Gear On Intake Side

Courtesy of BMW OF NORTH AMERICA, INC.

Slide special tool 64 1 020 or any other suitable tool through the gear into the counterbalance shaft.

Carefully insert counterbalance shaft (1) into the gear on the exhaust side.

Fig 19: Inserting Counterbalance Shaft Into Gear On Exhaust Side

Courtesy of BMW OF NORTH AMERICA, INC.

Screw both bolts (1) into the counterbalance shafts on the left and right.

NOTE: Do not tighten screws (1) because otherwise the counterbalance shafts cannot be positioned in the next operation.

Fig 20: Counterbalance Shaft Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Turn the crankshaft to the TDC of the first cylinder.

Mount special tool 2 288 054 and abut screws (1).

Observe installation note in next operation!

Fig 21: Mounting Special Tool (2 288 054) With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

NOTE: Make sure special tool 2 288 054 is properly seated in the guides (1) of the counterbalance shaft (2).

Slightly twist crankshaft and/or counterbalance shafts if necessary.

Tighten special tool 2 288 054 to 20 Nm.

Fig 22: Tightening Special Tool (2 288 054) On Guides Of Counterbalance Shaft

Courtesy of BMW OF NORTH AMERICA, INC.

Tighten down screws (1).

Tightening torque 11 27 1AZ .

Fig 23: Counterbalance Shaft Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Release screws (1) and remove special tool 2 288 054 .

Fig 24: Mounting Special Tool (2 288 054) With Screws

Courtesy of BMW OF NORTH AMERICA, INC.

Parts: Replace sealing cap (1).

Ensure proper fit of O-ring.

Install both sealing caps (1).

Fig 25: Removing Sealing Caps With Screwdriver

Courtesy of BMW OF NORTH AMERICA, INC.