Engine Specs -S65/S85 Main Bearings: Difference between revisions

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Revision as of 06:11, 10 January 2015


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 End Superceded By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.
Journal 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
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