Main Journals & Bearing Clearance
| Crankshaft Main Journals & Bearings
|
Metric Dimensions
|
SAE (Inch) Dimensions
|
| Main Journal Dimensions
|
59.9758 mm
|
2.36125 inch
|
| Main Journal Variance
|
59.9694 - 59.9821 mm
|
2.36100 - 2.36150 inch
|
| Main Journal Tolerance
|
-0.0063, +0.0063 mm
|
-0.00025, +0.00025 inch
|
| Bed Plate + Bearing Dimensions
|
60.0164 mm
|
2.36285 inch
|
| Bed Plate + Bearing Variance
|
60.0126 - 60.0202 mm
|
2.36270 - 2.36300 inch
|
| Nominal Main Bearing Clearance
|
0.0406 mm
|
0.00160 inch
|
| Bearing Clearance Variance
|
0.0305 - 0.0508 mm
|
0.00120 - 0.00200 inch
|
| Bearing Clearance Tolerance
|
-0.0102, +0.0102 mm
|
-0.00040, +0.00040 inch
|
Main Bearing Part Numbers
| BMW Part Number
|
Description
|
Location
|
Color
|
Standard Size Bearings
|
Application
|
| 11 21 7 841 610
|
Main Bearing Shell
|
1-4
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
| 11 21 7 841 606
|
Main Bearing Shell
|
1-4
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
| 11 21 7 841 618
|
Main Guide Bearing Shell
|
5
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
| 11 21 7 841 614
|
Main Guide Bearing Shell
|
5
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Main Bearing History
The following is the main bearing history of the "Green" bearings. Yellow and Violate bearings follow an identical pattern, but with their respective part numbers. Maybe if I get some time, I'll add them to this list.
| BMW Part Number
|
Description
|
Location
|
Color
|
Standard Size Bearings
|
Application
|
Prod. Start
|
Prod. End
|
Superceded By
|
| 11 21 7 836 532
|
Main Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50
|
Sep-04
|
Feb-08
|
11 21 7 841 489
|
| 11 21 7 836 517
|
Main Guide Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50
|
Sep-04
|
Feb-08
|
11 21 7 841 499
|
| 11 21 7 836 539
|
Main Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50
|
Sep-04
|
Feb-08
|
11 21 7 841 484
|
| 11 21 7 836 524
|
Main Guide Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50
|
Sep-04
|
Feb-08
|
11 21 7 841 494
|
| 11 21 7 841 489
|
Main Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Sep-07
|
Jul-11
|
11 21 7 841 610
|
| 11 21 7 841 499
|
Main Guide Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Sep-07
|
Dec-08
|
11 21 7 841 618
|
| 11 21 7 841 484
|
Main Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Sep-07
|
Apr-11
|
11 21 7 841 606
|
| 11 21 7 841 494
|
Main Guide Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Sep-07
|
Jan-09
|
11 21 7 841 614
|
| 11 21 7 841 610
|
Main Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Nov-08
|
Present
|
|
| 11 21 7 841 618
|
Main Guide Bearing Shell
|
Top
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Dec-08
|
Present
|
|
| 11 21 7 841 606
|
Main Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Nov-08
|
Present
|
|
| 11 21 7 841 614
|
Main Guide Bearing Shell
|
Bottom
|
Green
|
60.00 mm (+0.00 mm)
|
S85B50, S65B40, S65B44
|
Nov-08
|
Present
|
|
Supporting Measurements
|
|
Main-1
|
Main-2
|
Main-3
|
Main-4
|
Main-5
|
Bearing-1
|
Bearing-2
|
Bearing-3
|
Bearing-4
|
Bearing-5
|
Clear-1
|
Clear-2
|
Clear-3
|
Clear-4
|
Clear-5
|
| Crank-1
|
2.36145
|
2.36145
|
2.36130
|
2.36150
|
2.36140
|
2.36270
|
2.36270
|
2.36300
|
2.36300
|
2.36290
|
0.00125
|
0.00125
|
0.00170
|
0.00150
|
0.00150
|
| Crank-2
|
2.36110
|
2.36110
|
2.36120
|
2.36100
|
2.36120
|
2.36270
|
2.36270
|
2.36300
|
2.36300
|
2.36290
|
0.00160
|
0.00160
|
0.00180
|
0.00200
|
0.00170
|
|
|
Min
|
Nominal
|
Max
|
Min Dev.
|
Max Dev.
|
| Main
|
2.36100
|
2.36125
|
2.36150
|
-0.00025
|
0.00025
|
| Bearing
|
2.36270
|
2.36285
|
2.36300
|
-0.00015
|
0.00015
|
| Clearance
|
0.00120
|
0.00160
|
0.00200
|
-0.00040
|
0.00040
|
