11 33 050 Removing and installing/replacing all rocker arms (B48B) (230i and 230i xDrive coupe/convertible)

Special tools required:

11 4 480

Necessary preliminary work:

Refer to REMOVING INTAKE CAMSHAFT .
Refer to REMOVING EXHAUST CAMSHAFT .

IMPORTANT: Roller cam followers on intake side are subdivided into bearing classes.
Already used roller cam followers may only be reused in the same position.

Removal:

Release roller cam followers (1) on intake side from hydraulic valve clearance compensating elements and remove.

Place all roller cam followers in order in special tool 11 4 480 .

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Release roller cam followers (1) on exhaust side from hydraulic valve clearance compensating elements and remove.

Place all roller cam followers in order in special tool 11 4 480 .

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Installation:

Classification of roller cam follower intake.

The tolerance classes are marked according to the graphic in numbers from 1 to 5.

Standard: Number 3. standard.

Number 2. slow idle.

Number 4. fast idle.

In case of repair: rough idling speed.

Repair: 1

Number 1. lower engine speed in idle.

Number 5. higher engine speed in idle.

Courtesy of BMW OF NORTH AMERICA, INC.

Install roller cam followers (1) on intake side.

NOTE: Ensure correct position of roller cam followers on hydraulic valve clearance compensating elements and intake valves.

Courtesy of BMW OF NORTH AMERICA, INC.

Install roller cam followers (1) on exhaust side.

NOTE: Ensure correct position of roller cam followers on hydraulic valve clearance compensating elements and exhaust valves.

Courtesy of BMW OF NORTH AMERICA, INC.

Required follow-up work:

Refer to INSTALLING EXHAUST CAMSHAFT .
Refer to INSTALLING INTAKE CAMSHAFT .