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Home >> Mini >> 2015 >> Cooper Base, 2D Convertible, 1.6L Eng, Standard Trans >> Repair and Diagnosis >> Engine Performance >> Engine Control Systems >> Engine - Repair (R58 & R59) -- Cooper >> Crankshaft With Bearing >> 11 21 531 Replacing all crankshaft main bearings (N18)

11 21 531 Replacing all crankshaft main bearings (N18)

Special tools required: 

IMPORTANT: Modified assignment of bearing positions.
Bearing position (1) is at the output end (clutch end)
Determine main bearing colors; the designations on the crankcase and crankshaft are always required and can only determined using the table.
A different bearing classification is necessary at bearing seat 5 on account of the central bolt on the timing chain drive.

Necessary preliminary tasks: 

Installation note: 

Bearing shell (1) with lubricant groove must be fitted in crankcase upper section.

Bearing shell (2) without lubricant groove must be fitted in crankcase lower section (bedplate).

Fig 1: Identifying Bearing Shell With And Without Lubricating Groove
G04751107Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Modified assignment of bearing positions.
Bearing position (1) is at the output end (clutch end)

Bearings (1 to 5).

Bearing (2) is a guide bearing.

Fig 2: Identifying Bearings
G04796207Courtesy of BMW OF NORTH AMERICA, INC.
IMPORTANT: Clean sealing surfaces.
Do not  clean sealing surfaces with a metal cutting tool.

Only use special tool 11 4 470 to clean sealing surfaces.

Insert guide rings (1) in crankcase at bearing seat (2) with groove facing outwards.

If necessary, attach with engine oil to crankcase.

Fig 3: Identifying Guide Rings
G04789742Courtesy of BMW OF NORTH AMERICA, INC.

Bearing classification on crankcase upper and lower sections: 

Bearing allocation 1 - 5: the designations on the crankshaft are always required. 

Refer to the table for the color code.

Example: 

Bearing 1. Letter P

Bearing 2. Letter K

Bearing 3. Letter I

Bearing 4. Letter N

Bearing 5. Letter N

Fig 4: Identifying Bearing Classification (1 Of 4)
G04796210Courtesy of BMW OF NORTH AMERICA, INC.

Bearing classification on crankcase upper and lower sections: 

Bearing allocation 1 - 5: the designations on the crankcase are always required. 

Refer to the table for the color code.

Example: 

Bearing 1. Letter T

Bearing 2. Letter Q

Bearing 3. Letter Q

Bearing 4. Letter R

Bearing 5. Letter R

Fig 5: Identifying Bearing Classification (2 Of 4)
G04796211Courtesy of BMW OF NORTH AMERICA, INC.

Example  : Crankshaft/crankcase.

Bearing (1):

Letter P  on the crankshaft and letter T  on the crankcase correspond to bearing color codes for the crankcase Or  = orange with lubricating groove.

Letter P  on the crankshaft and letter T  on the crankcase correspond to bearing color codes for the crankcase lower section (bedplate) Ge  = yellow without lubricating groove.

Bearing (2):

Letter K  on the crankshaft and letter Q  on the crankcase correspond to bearing color codes for the crankcase Or  = orange with lubricating groove.

Letter K  on the crankshaft and letter Q  on the crankcase correspond to bearing color codes for the crankcase lower section (bedplate) Or  = orange without lubricating groove.

Bearing (3):

Letter I  on the crankshaft and letter Q  on the crankcase correspond to bearing color codes for the crankcase Or  = orange with lubricating groove.

Letter I  on the crankshaft and letter Q  on the crankcase correspond to bearing color codes for the crankcase lower section (bedplate) Or  = orange without lubricating groove.

Bearing (4):

Letter N  on the crankshaft and letter R  on the crankcase correspond to bearing color codes for the crankcase Ge  = yellow without lubricating groove.

Letter N  on the crankshaft and letter R  on the crankcase correspond to bearing color codes for the crankcase lower section (bedplate) Ge  = yellow without lubricating groove.

Attention: See extra table. 

Bearing (5):

Letter N  on the crankshaft and letter R  on the crankcase correspond to bearing color codes for the crankcase Ge  = yellow with lubricating groove.

Letter N  on the crankshaft and letter R  on the crankcase correspond to bearing color codes for the crankcase lower section (bedplate) Gr  = green without lubricating groove.

Crankshaft bearing colors, bearing positions 1-4 

Sw = Black.

Gr = Green.

Ge = Yellow.

Or = Orange.

Br = Brown.

Table overview of bearing classification: Upper section, bearings 1 - 4 Crankshaft
Bearings 1-4 A  B  C  D  E  G  H  I  K  M  N  P  q  R  S  T  U 
Crankcase A  Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw
B  Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw
C  Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw
D  Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw
E  Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr
G  Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr
H  Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr
I  Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr
K  Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr
M  Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr
N  Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr
P  Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr
q  Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge
R  Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge
S  Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge
T  Br Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge
U  Br Br Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge
X  Br Br Br Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge
Y  Br Br Br Br Br Br Br Or Or Or Or Or Or Or Or Ge Ge
Z-Series  Br Br Br Br Br Br Br Br Or Or Or Or Or Or Or Or Ge
Table overview of bearing classification: Lower section, bearings 1 - 4 Crankshaft
Bearings 1-4 A  B  C  D  E  G  H  I  K  M  N  P  q  R  S  T  U 
Crankcase A  Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw
B  Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw
C  Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw
D  Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw
E  Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw
G  Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw
H  Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw
I  Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw
K  Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr
M  Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr
N  Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr
P  Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr
q  Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr
R  Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr
S  Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr
T  Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr
U  Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge
X  Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge
Y  Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge
Z-Series  Br Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge

Crankshaft bearing colors, bearing position 5: 

Sw = Black.

Gr = Green.

Ge = Yellow.

Or = Orange.

Br = Brown (only in crankcase upper section).

Table overview of bearing classification: Upper section, bearing 5 Crankshaft
Bearing 5 A  B  C  D  E  G  H  I  K  M  N  P  q  R  S  T  U 
Crankcase A  Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw
B  Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw
C  Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw
D  Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw
E  Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw
G  Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw
H  Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw
I  Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw
K  Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw
M  Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr
N  Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr
P  Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr
q  Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr
R  Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr
S  Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr
T  Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr
U  Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr
X  Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge
Y  Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge
Z-Series  Br Br Br Or Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge
Table overview of bearing classification: Lower section, bearing 5 Crankshaft
Bearing 5 A  B  C  D  E  G  H  I  K  M  N  P  q  R  S  T  U 
Crankcase A  Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw
B  Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw
C  Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw
D  Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw Sw
E  Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw Sw
G  Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw Sw
H  Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw Sw
I  Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw Sw
K  Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw Sw
M  Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw Sw
N  Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw Sw
P  Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw Sw
q  Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr Sw
R  Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr Gr
S  Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr Gr
T  Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr Gr
U  Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr Gr
X  Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr Gr
Y  Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr Gr
Z-Series  Or Or Or Or Or Or Or Ge Ge Ge Ge Ge Ge Ge Ge Gr Gr

Install crankcase lower section.

Assemble engine.

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