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
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Superceded By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 Crankshaft 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
|
