Adjusting timing of camshaft(s) (B48 and B46 engine) (Cooper S and John Cooper Works)

2019 Mini Cooper Base, 2D Convertible, Automatic TransSECTION Adjusting timing of camshaft(s) (B48 and B46 engine) (Cooper S and John Cooper Works)

Special tools required: 

  • 2 288 380
  • 0 496 855
  • 2 450 487
  • 2 358 122
  • 11 6 480

Preliminary work needed: 

IMPORTANT: Risk of damage to engine.
The notes for CHECKING AND ADJUSTING THE TIMING  must be strictly observed!
The notes on CHECKING AND ADJUSTMENT OF TIMING  must be strictly observed!
If the crankshaft is disconnected properly, it is not possible to turn the engine forwards or backwards on the vibration damper!

Vehicles with manual transmission: 

Dimension (x) = 56 mm.

Insert the special tool 2 288 380 up to dimension (X) into the dowel hole.

G11645085Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with manual transmission: 

Special tool 2 288 380 correctly positioned.

The engine is located at the first cylinder at TDC.

G12712526Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with manual transmission: 

Special tool 2 288 380 incorrectly positioned.

The TDC setting of the first cylinder has not been achieved.

G12712527Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with automatic transmission: 

Dimension (Y) = 66 mm.

Insert the special tool 2 288 380 up to dimension (Y) into the dowel hole.

G11645088Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with automatic transmission: 

Special tool 2 288 380 correctly positioned.

The engine is located at the first cylinder at TDC.

G12886777Courtesy of BMW OF NORTH AMERICA, INC.

Vehicles with automatic transmission: 

Special tool 2 288 380 incorrectly positioned.

The TDC setting of the first cylinder has not been achieved.

G11645090Courtesy of BMW OF NORTH AMERICA, INC.

Release CHAIN TENSIONER  (1).

IMPORTANT: Have a cleaning cloth ready. A small quantity of motor oil will leakage after the screw connection has been released.

Installation note: 

A new chain tensioner and sealing ring must be installed.

G11645133Courtesy of BMW OF NORTH AMERICA, INC.

Version 1 

Use the reversible ratchet head (2) from special tool 0 496 855 with special tool 2 450 487 to release the central valve (1).

G11645144Courtesy of BMW OF NORTH AMERICA, INC.

Version 2 

Use special tool 0 496 855 to release the central valve (1).

G11645145Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: If special tool 2 358 122 cannot be mounted, the timing must be readjusted.

Mount gauge (1) from special tool 2 358 122.

If necessary, turn the crankshaft a little using the special tool 11 6 480.

Mount the counter support (3) and loosen the VANOS central valve of the intake camshaft with the special tool 0 496 855.

If necessary, turn the crankshaft a little further using the special tool 11 6 480.

Mount the counter support (2) and loosen the VANOS central valve of the exhaust camshaft with the special tool 0 496 855.

G11645146Courtesy of BMW OF NORTH AMERICA, INC.

Turn both camshafts to position.

NOTE: The markings (1) on the intake and exhaust camshafts can be read from above.
G11645094Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: The special tool can also be fitted if the camshafts are rotated by 180 degrees.
The middle one  of the three flat sections (1) on the intake and exhaust camshafts must point upwards.
G11645095Courtesy of BMW OF NORTH AMERICA, INC.

Secure basic carrier (1) by screws (2) on cylinder head.

Position gauge (3) with recess on mounting flats of exhaust camshaft.

Secure basic carrier (3) by screws (5) on basic carrier.

Position gauge (4) with recess on mounting flats of intake camshaft.

Secure gauge (4) by screws (5) on basic carrier.

G11645099Courtesy of BMW OF NORTH AMERICA, INC.

Install new chain tensioner.

Tighten chain tensioner (1).

Tightening torque 11 31 1AZ .

G11645133Courtesy of BMW OF NORTH AMERICA, INC.

Tighten VANOS central valve of intake camshaft adjuster (1).

Tightening torque 11 36 1AZ .

G11645151Courtesy of BMW OF NORTH AMERICA, INC.

Tighten VANOS central valve of exhaust camshaft adjuster (1).

Tightening torque 11 36 1AZ .

Remove special tools 2 288 380 and 2 358 122.

G11645152Courtesy of BMW OF NORTH AMERICA, INC.

Crank engine with special tool 11 6 480 twice in direction of engine rotation.

IMPORTANT: Do not crank engine in reverse direction.
G11645091Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work: 

RENDER: 1.0x

NO RELATED

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When to See a Mechanic

Stop DIY work and contact a certified mechanic immediately if any of the following apply:

  • You smell fuel, burning insulation, or see smoke.
  • Brakes feel soft, pull hard to one side, or make grinding noises.
  • The engine overheats, stalls repeatedly, or misfires under load.
  • You are missing required tools, torque specs, or safe lifting equipment.
  • You are not confident in the next step or safety outcome.