LEMON Manuals: Even more car manuals for everyone
Home >> Mini >> 2010 >> Cooper S, 2D Hatchback, Standard >> Repair and Diagnosis >> External Pages >> Different car >> Section 2592 (Engine - Repair - N52 - E90) >> Cylinder Head And Cylinder Head Cover >> 11 12 100 Removing and installing cylinder head (N52K) >> Notes

11 12 100 Removing and installing cylinder head (N52K): Notes

WARNING: This page does not describe the selected car, but rather 9 other vehicles, including the 2011 BMW 328xi, 2011 BMW 328i, 2011 BMW 323i, 2010 BMW 328xi, and 2010 BMW 328i. However, it is still accessible from the selected car via links, so may be relevant.
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: 

IMPORTANT: Fit new cylinder head screws.
Do not wash off bolt coating.
There must be no fluids or contaminants in any of the threaded holes for the cylinder head bolt connections.

Risk of corrosion and cracking! 

Apply a light  coat of oil to washer contact areas and threads of new cylinder head bolts.

Release screws (1).

Unclip timing chain module (2) at junction (3) and remove towards top.

Set down timing chain.

IMPORTANT: If the timing chain is stowed in the gearcase, the crankshaft must no longer be rotated.
This would cause the timing chain on the crankshaft sprocket wheel to jam or jump.

Installation: 

The timing chain is lifted out with a hook only during assembly.

Fig 1: Identifying Timing Chain Module With Mounting Screws
G04751035Courtesy of BMW OF NORTH AMERICA, INC.

Release bolts (2) for eccentric shaft sensor (1).

Remove eccentric shaft sensor (1) towards front.

Fig 2: Removing Eccentric Shaft Sensor Mounting Bolts
G04751036Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Screw (1) is not magnetic and must be secured against falling down.

Release screw (1).

Remove magnet wheel (2) towards front.

Fig 3: Removing Magnet Wheel Towards Front
G04751037Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Magnet wheel (1) is highly magnetic and must be protected against metal filings/borings.

After removing, place magnet wheel (1) in a plastic bag (2) with a seal.

Fig 4: Identifying Magnet Wheel In Plastic Bag
G04751038Courtesy of BMW OF NORTH AMERICA, INC.

Pre-tension eccentric shaft (1) upwards in direction of arrow.

Remove stop screw between 1st and 2nd cylinders.

Tightening torque 11 37 5AZ .

Fig 5: Identifying Eccentric Shaft With Mounting Screws
G04751039Courtesy of BMW OF NORTH AMERICA, INC.
NOTE: Bolt (2) can only be released when the timing chain module is pressed forward slightly.
IMPORTANT: Secure bolt (2) with a gripper against falling down.
Fig 6: Identifying Timing Chain Module Mounting Screws And Bolts
G04751040Courtesy of BMW OF NORTH AMERICA, INC.

Release screw (2).

Tightening torque 11 12 3AZ .

Release screws (1).

Tightening torque 11 12 4AZ .

Installation: 

scientia non olet · About LEMON Manuals