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Home >> Mini >> 2010 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 4204 (Engine - Pistons, Piston Rings, Balancing Shafts, Rocker Arms, Intake / Exhaust Valves, Valve Springs, Valve Stem Seals, Variable Valve Lift Control System (VALVETRONIC) - Repair) >> Rocker Arms >> N55 Hybrid Engine >> 11 33 050 Removing and installing/replacing all rocker arms (N55 Hybrid)

11 33 050 Removing and installing/replacing all rocker arms (N55 Hybrid)

WARNING: This page does not describe the selected car, but rather 50 other vehicles, including the 2016 BMW M5, 2016 BMW ActiveHybrid 5, 2016 BMW 550i xDrive, 2016 BMW 550i, and 2016 BMW 535i xDrive. However, it is still accessible from the selected car via links, so may be relevant.

Special tools required: 

WARNING:

High-voltage hazard!

The following must be strictly observed prior to starting work  :

Necessary preliminary work: 

IMPORTANT: Roller cam followers (1) on intake side are divided into bearing classes.
The tolerance classes are marked according to the graphic in numbers from 1 to 5.
Already used roller cam followers (1) may only be reused in the same position.

Detach roller cam followers (1) from hydraulic valve clearance compensating element and remove.

Place all roller cam followers (1) in neat order on special tool 11 4 481 .

Installation note: 

Prior to installation of intermediate levers, ensure proper installation position of roller cam followers (1).

Fig 1: Identifying Roller Cam Follower
G09923791Courtesy of BMW OF NORTH AMERICA, INC.

Classification of roller cam follower intake.

Standard: Number 3. standard.

Number 2. slow idle.

Number 4. fast idle.

In case of repair: rough idling speed.

Repair: 1

Number 1. slow speed in idle.

Number 5. high speed in idle.

Fig 2: Identifying Classification Number Of Roller Cam Follower
G09923792Courtesy of BMW OF NORTH AMERICA, INC.

Detach roller cam follower (1) on exhaust side from hydraulic valve clearance compensating element and remove.

Place all roller cam followers (1) in neat order on special tool 11 4 482 .

Installation note: 

Prior to installation of exhaust camshaft, ensure proper installation position of roller cam followers (1).

Fig 3: Identifying Roller Cam Follower
G09923793Courtesy of BMW OF NORTH AMERICA, INC.

Remove hydraulic valve clearance compensating element (1) on intake side in direction of arrow.

Installation note: 

If hydraulic valve clearance compensating elements (1) are reused, they must be placed together with rocker arms in neat order in special tool 11 4 481 .

Fig 4: Removing Valve Clearance Compensating Element
G09923794Courtesy of BMW OF NORTH AMERICA, INC.

Remove hydraulic valve clearance compensating element (1) on exhaust side in direction of arrow.

Installation note: 

If hydraulic valve clearance compensating elements (1) are reused, they must be placed together with rocker arms in neat order in special tool 11 4 482 .

Fig 5: Removing HVC Element
G09923795Courtesy of BMW OF NORTH AMERICA, INC.

Assemble engine.

Check function of DME; if necessary, readjust uniform mixture distribution.