Difference between revisions of "Engine Specs - S65 Rod Bearings"

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Revision as of 05:20, 16 December 2015


Rod Journal Dimensions

Crankshaft Rod Journals Metric Dimensions SAE (Inch) Dimensions
Rod Journal Dimensions 51.9811mm 2.04650 inch
Rod Journal Variance 51.9786 - 51.9887 mm 2.04640 - 2.04680 inch
Rod Journal Tolerance -0.0025, +0.0076 mm -0.00010, +0.00030 inch

Bearings Specification, Dimensions, Clearance

OEM 088/089 Bearings

Production and Composition

BMW "088/089" bearings were the factory production bearings between 2007 to mid-2010. When the EU mandated the removal from lead in automotive bearings, BMW discontinued these bearings.
The composition is a standard babbit lead/copper bearing. They are soft faced, and easy on the crankshaft.
Manufacturer: Clevite. Clevite logo is seen on the back of the bearings.

Dimensions

Bearing Dimensions (088/089 Bearings) Metric Dimensions SAE (Inch) Dimensions
Nominal Bearing Thickness (Top, Blue) 2.0028 mm 0.07885 inch
Nominal Bearing Thickness (Bottom, Red) 1.9977 mm 0.07865 inch
Bearing Thickness Variance (Top, Blue) 2.0015 - 2.0041 mm 0.07880 - 0.07890 inch
Bearing Thickness Variance (Bottom, Red) 1.9964 - 2.0015 mm 0.07860 - 0.07880 inch
Bearing Tolerance (Top, Blue) -0.0013 - 0.0013 mm -0.00005 - +0.00005 inch
Bearing Tolerance (Bottom, Red) -0.0013 - 0.0038 mm -0.00005 - +0.00015 inch


Bearing Clearance Specifications

Con Rod Clearance (088/089 Bearings) [* 1] Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0179 mm 2.04795 inch
Rod + Bearing Variance [* 1] 52.0154 - 52.0192 mm 2.04785 - 2.04800 inch
Nominal Rod Bearing Clearance 0.0368 mm 0.00145 inch
Bearing Clearance Variance [* 1] 0.0267 - 0.0406 mm 0.00105 - 0.00160 inch
Bearing Clearance Tolerance -0.0102 - +0.0038 mm -0.00040 - +0.00015 inch
Bearing Clearance per Journal inch   0.00071 inch/inch
Bearing Clearance per Journal Inch Variance [* 1] 0.00066 - 0.00073 inch/inch
Bearing Eccentricity 0.0216 mm 0.00085 inch
Bearing Eccentricity Variance 0.0178 - 0.0229 mm 0.00070 - 0.00090 inch
Bearing Eccentricity Tolerance -0.0038 - +0.0013 mm -0.00015 - +0.00005 inch


Clearance Measurements

Angle Rod-1 Rod-2 Rod-3 Rod-4 Rod-5 Rod-6 Rod-7 Rod-8
5.00 2.05070 2.05040 2.05035 2.05055 2.05060 2.05050 2.05035 2.05050
19.75 2.04860 2.04860 2.04880 2.04880 2.04880 2.04885 2.04885 2.04885
45.00 2.04815 2.04800 2.04840 2.04815 2.04830 2.04805 2.04835 2.04830
90.00 2.04785 2.04790 2.04795 2.04795 2.04800 2.04795 2.04800 2.04800
135.00 2.04800 2.04820 2.04820 2.04840 2.04820 2.04810 2.04840 2.04820
160.25 2.04860 2.04860 2.04880 2.04870 2.04885 2.04880 2.04870 2.04885
175.00 2.05060 2.05100 2.05035 2.05060 2.05055 2.05015 2.05050 2.05055
Clearance 0.00135 0.00140 0.00145 0.00145 0.00150 0.00145 0.00150 0.00150

Note: Clearance measurements are based on nominal rod journal diameter of 2.0465 inch.

Eccentricity Measurements

Angle Rod-1 Rod-2 Rod-3 Rod-4 Rod-5 Rod-6 Rod-7 Rod-8
5.00 0.00285 0.00250 0.00240 0.00260 0.00260 0.00255 0.00235 0.00250
19.75 0.00075 0.00070 0.00085 0.00085 0.00080 0.00090 0.00085 0.00085
45.00 0.00030 0.00010 0.00045 0.00020 0.00030 0.00010 0.00035 0.00030
90.00 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
135.00 0.00015 0.00030 0.00025 0.00045 0.00020 0.00015 0.00040 0.00020
160.25 0.00075 0.00070 0.00085 0.00075 0.00085 0.00085 0.00070 0.00085
175.00 0.00275 0.00310 0.00240 0.00265 0.00255 0.00220 0.00250 0.00255


BMW 088-089 Eccentricity.jpg
Bearing Eccentricity: BMW Factory 088/089 rod bearings

OEM 702/703 Bearings

Production and Composition

EU mandates against lead/copper bearings began in 2011. However, S65 engines have been seen with mid-2010 production dates having these newer 702/703 bearings. These bearings remained in production until the end of S65 production in 2013.
The new 702/703 bearings are made from tin/aluminum composition. BMW increased the clearance slightly over the 088/089 bearings and increased the eccentricity as well. But this improvement in clearance and eccentricity came at a price. The 702/703 bearings are substantially harder than the 088/089 bearings they replaced. As a consequence, then a bearing is spun, it tends to cause more damage to the crankshaft in the process.
Manufacturer: King (believed to be King, but this is unconfirmed).

Dimensions

Bearing Dimensions (702/703 Bearings) Metric Dimensions SAE (Inch) Dimensions
Nominal Bearing Thickness (Top, Blue) 1.9977 mm 0.07865 inch
Nominal Bearing Thickness (Bottom, Red) 1.9939 mm 0.07850 inch
Bearing Thickness Variance (Top, Blue) 1.9977 - 1.9990 mm 0.07865 - 0.07870 inch
Bearing Thickness Variance (Bottom, Red) 1.9939 - 1.9952 mm 0.07850 - 0.07855 inch
Bearing Tolerance (Top, Blue) 0.0000 - 0.0013 mm 0.00000 - +0.00005 inch
Bearing Tolerance (Bottom, Red) 0.0000 - 0.0013 mm 0.00000 - +0.00005 inch


Bearing Clearance Specifications

Con Rod Clearance (702/703 Bearings) Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0243 mm 2.04820 inch
Rod + Bearing Variance 52.0230 - 52.0294 mm 2.04815 - 2.04840 inch
Nominal Rod Bearing Clearance 0.0432 mm 0.00170 inch
Bearing Clearance Variance 0.0343 - 0.0508 mm 0.00135 - 0.00200 inch
Bearing Clearance Tolerance -0.0089 - +0.0076 mm -0.00035 - +0.00030 inch
Bearing Clearance per Journal inch   0.00083 inch/inch
Bearing Clearance per Journal Inch Variance 0.00081 - 0.00093 inch/inch
Bearing Eccentricity 0.0508 mm 0.00200 inch
Bearing Eccentricity Variance 0.0444 - 0.0584 mm 0.00175 - 0.00230 inch
Bearing Eccentricity Tolerance -0.0063 - +0.0076 mm -0.00025 - +0.00030 inch


Clearance Measurements

Angle Rod-1 Rod-2 Rod-3 Rod-4 Rod-5 Rod-6 Rod-7 Rod-8
5.00 2.05280 2.05290 2.05290 2.05280 2.05250 2.05260 2.05270 2.05290
19.75 2.05045 2.05035 2.05035 2.05020 2.05010 2.05020 2.05035 2.05035
45.00 2.04900 2.04880 2.04880 2.04920 2.04870 2.04890 2.04880 2.04890
90.00 2.04830 2.04815 2.04840 2.04820 2.04835 2.04830 2.04820 2.04820
135.00 2.04900 2.04890 2.04900 2.04885 2.04900 2.04890 2.04890 2.04885
160.25 2.05035 2.05045 2.05035 2.05020 2.05040 2.05040 2.05035 2.05020
175.00 2.05280 2.05300 2.05270 2.05280 2.05285 2.05290 2.05285 2.05300
Clearance 0.00180 0.00165 0.00190 0.00170 0.00185 0.00180 0.00170 0.00170

Note: Clearance measurements are based on nominal rod journal diameter of 2.0465 inch.

Eccentricity Measurements

BE Bearings

Production and Composition

BE Bearings are a full custom rod bearing designed and manufactured by Clevite. Clevite manufactures the bearings to the BE Bearing specifications.

The composition is a standard babbit lead/copper bearing with additional Clevite Tri-Armor non-friction coating. They are soft faced, and easy on the crankshaft, and compatible with stop-start vehicles. Manufacturer: Clevite. Clevite logo is seen on the back of the bearings.

Bearing Clearance Specifications

BE Bearings (Clevite) Custom Rod Bearings Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0413 mm 2.04887 inch
Rod + Bearing Variance 52.0413 mm 2.04860 - 2.04920 inch
Nominal Rod Bearing Clearance 0.0610 mm 0.00240 inch
Bearing Clearance Variance 0.0000 - 0.0000 mm 0.00000 - 0.00000 inch
Bearing Clearance Tolerance -0.0610 - -+0.0610 mm -0.00240 - -+0.00240 inch
Bearing Clearance per Journal inch   0.00116 inch/inch
Bearing Clearance per Journal Inch Variance 0.00103 - 0.00132 inch/inch
Bearing Eccentricity 0.0419 mm 0.00165 inch
Bearing Eccentricity Variance 0.0229 - 0.0483 mm 0.00090 - 0.00190 inch
Bearing Eccentricity Tolerance -0.0191 - +0.0063 mm -0.00075 - +0.00025 inch


Clearance Measurements

Angle Rod-1 Rod-2 Rod-3 Rod-4 Rod-5 Rod-6 Rod-7 Rod-8
5.00 2.05280 2.05200 2.05305 2.05190 2.05270 2.05290 2.05235 2.05225
19.75 2.05050 2.05040 2.05030 2.05030 2.05070 2.05055 2.05065 2.05025
45.00 2.04930 2.04910 2.04920 2.04935 2.04965 2.04940 2.04965 2.04940
90.00 2.04860 2.04885 2.04870 2.04900 2.04920 2.04875 2.04900 2.04885
135.00 2.04900 2.04930 2.04920 2.04940 2.04910 2.04910 2.04930 2.04920
160.25 2.05010 2.05050 2.05045 2.05065 2.05010 2.05010 2.05000 2.05005
175.00 2.05315 2.05205 2.05280 2.05290 2.05260 2.05270 2.05250 2.05190
Clearance 0.00210 0.00235 0.00220 0.00250 0.00270 0.00225 0.00250 0.00235

Note: Clearance measurements are based on nominal rod journal diameter of 2.0465 inch.

Eccentricity Measurements

Angle Rod-1 Rod-2 Rod-3 Rod-4 Rod-5 Rod-6 Rod-7 Rod-8
5.00 0.00420 0.00315 0.00435 0.00290 0.00350 0.00415 0.00335 0.00340
19.75 0.00190 0.00155 0.00160 0.00130 0.00150 0.00180 0.00165 0.00140
45.00 0.00070 0.00025 0.00050 0.00035 0.00045 0.00065 0.00065 0.00055
90.00 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000 0.00000
135.00 0.00040 0.00045 0.00050 0.00040 -0.00010 0.00035 0.00030 0.00035
160.25 0.00150 0.00165 0.00175 0.00165 0.00090 0.00135 0.00100 0.00120
175.00 0.00455 0.00320 0.00410 0.00390 0.00340 0.00395 0.00350 0.00305


BEB SP1527HK Eccentricity.jpg
BE Bearings Eccentricity vs. stock 088/089 and stock 702/703 rod bearings

VAC Clevite Bearings

Production and Composition

Custom made by Clevite for VAC Motorsports.

Dimensions

Will post when available.

Bearing Clearance Specifications

VAC (Clevite) Custom Rod Bearings Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0344 mm 2.04860 inch
Rod + Bearing Variance 52.0294 - 52.0344 mm 2.04840 - 2.04860 inch
Nominal Rod Bearing Clearance 0.0508 mm 0.00200 inch
Bearing Clearance Variance 0.0406 - 0.0559 mm 0.00160 - 0.00220 inch
Bearing Clearance Tolerance -0.0102 - +0.0051 mm -0.00040 - +0.00020 inch
Bearing Clearance per Journal inch   0.00099 inch/inch
Bearing Clearance per Journal Inch Variance 0.00093 - 0.00103 inch/inch
Bearing Eccentricity 0.0203 mm 0.00080 inch
Bearing Eccentricity Variance 0.0114 - 0.0254 mm 0.00045 - 0.00100 inch
Bearing Eccentricity Tolerance -0.0089 - +0.0051 mm -0.00035 - +0.00020 inch


Calico Coated Bearings

Production and Composition

Calico coated bearings start life as standard 072/703 bearings. These bearings are sold through VAC, ESS, and Harrop. An end-user may also send bearings to Calico for coating. Calico adds their CT-1 coating to the surface of the bearing. The coating adds a slight thickness, thereby decreasing bearing clearance. The thickness to each shell is estimated by Calico between 0.0002 - 0.0004 inch.
Manufacturer: Calico Coatings
Manufacturing Defects: There's two primary manufacturing defects associated with Calico coated bearings.

  1. Calico coating is also placed on the parting lines. The material on the parting lines will affect the "bearing crush" and may wear unevenly or in a different manner than a standard OEM bearing.
  2. BMW bearings are sold in upper (blue) and lower (red) bearing shells. When the Calico coating is applied, this color distinction is lost. The upper (blue) bearings are slightly thicker than the lower (red) bearings. However, Calico habitually mixes these shells up and returns them to the customer mislabeled: uppers are now lowers, and visa-versa.

Dimensions

Will post when available.

Bearing Clearance Specifications

VAC (Calico) Coated Rod Bearings [* 2] Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0141 mm 2.04780 inch
Rod + Bearing Variance 52.0090 - 52.0141 mm 2.04760 - 2.04780 inch
Nominal Rod Bearing Clearance 0.0330 mm 0.00130 inch
Bearing Clearance Variance 0.0203 - 0.0356 mm 0.00080 - 0.00140 inch
Bearing Clearance Tolerance -0.0127 - +0.0025 mm -0.00050 - +0.00010 inch
Bearing Clearance per Journal inch   0.00063 inch/inch
Bearing Clearance per Journal Inch Variance 0.00054 - 0.00063 inch/inch


WPC Treated Bearings

Production and Composition

WPC treated bearings start life as standard 072/703 bearings. These bearings are sold through Auto Talent and EAS. An end-user may also send bearings to WPC for treatment. Unlike Calico CT-1 coating, the WPC treated bearings slightly remove material to create a low-friction surface. Manufacturer: WPC

Dimensions

Will post when available.

Bearing Clearance Specifications

WPC Treated Rod Bearings [* 3] Metric Dimensions SAE (Inch) Dimensions
Rod + Bearing Dimensions 52.0281 mm 2.04835 inch
Rod + Bearing Variance 52.0268 - 52.0332 mm 2.04830 - 2.04855 inch
Nominal Rod Bearing Clearance 0.0470 mm 0.00185 inch
Bearing Clearance Variance 0.0381 - 0.0546 mm 0.00150 - 0.00215 inch
Bearing Clearance Tolerance -0.0089 - +0.0076 mm -0.00035 - +0.00030 inch
Bearing Clearance per Journal inch   0.00090 inch/inch
Bearing Clearance per Journal Inch Variance 0.00088 - 0.00100 inch/inch


Bearing Notes

  1. ↑ 1.0 1.1 1.2 1.3 Roll-up of measurements taken from all cranks, all journals, and all OEM bearings.
  2. ↑ Full set of virgin Calico coated bearings measured in rods, and rolled-up with measurements from all cranks and all journals.
  3. ↑ Full set of virgin WPC treated bearings measured in rods, and rolled-up with measurements from all cranks and all journals.

Rod Bearing Part Numbers, History

BMW Part Number Description Location Color Standard Size Bearings Application Prod. Start Prod. End Superceded By
11 24 7 835 662 Connecting Rod Bearing Bottom Red 52.00 mm (+0.00 mm) S85B50 Apr-04 Apr-04 11 24 7 836 288
11 24 7 835 663 Connecting Rod Bearing Top Blue 52.00 mm (+0.00 mm) S85B50 Apr-04 Apr-04 11 24 7 836 289
11 24 7 836 288 Connecting Rod Bearing Bottom Red 52.00 mm (+0.00 mm) S85B50 Sep-04 Apr-07 11 24 7 838 088
11 24 7 836 289 Connecting Rod Bearing Top Blue 52.00 mm (+0.00 mm) S85B50 Sep-04 May-07 11 24 7 838 089
11 24 7 838 088 Connecting Rod Bearing Bottom Red 52.00 mm (+0.00 mm) S85B50, S65B40, S65B44 Feb-06 Oct-11 11 24 7 841 702
11 24 7 838 089 Connecting Rod Bearing Top Blue 52.00 mm (+0.00 mm) S85B50, S65B40, S65B44 Feb-06 Mar-11 11 24 7 841 703
11 24 7 841 702 Connecting Rod Bearing Bottom Red 52.00 mm (+0.00 mm) S85B50, S65B40, S65B44 Jun-10 Present
11 24 7 841 703 Connecting Rod Bearing Top Blue 52.00 mm (+0.00 mm) S85B50, S65B40, S65B44 Jun-10 Present  


BMW Part Number Description Location Color Oversize Bearings Application Prod. Start Prod. End Superceded By
11 24 7 835 974 Connecting Rod Bearing Bottom Red 51.75 mm (+0.25 mm) S85B50 Apr-04 Apr-04 11 24 7 836 290
11 24 7 835 975 Connecting Rod Bearing Top Blue 51.75 mm (+0.25 mm) S85B50 Apr-04 Apr-04 11 24 7 836 291
11 24 7 836 290 Connecting Rod Bearing Bottom Red 51.75 mm (+0.25 mm) S85B50 Aug-05 Dec-07 11 24 7 838 090
11 24 7 836 291 Connecting Rod Bearing Top Blue 51.75 mm (+0.25 mm) S85B50 Aug-05 Dec-07 11 24 7 838 091
11 24 7 838 090 Connecting Rod Bearing Bottom Red 51.75 mm (+0.25 mm) S85B50, S65B40, S65B44 Sep-05 Present
11 24 7 838 091 Connecting Rod Bearing Top Blue 51.75 mm (+0.25 mm) S85B50, S65B40, S65B44 Sep-05 Present  


Supporting Measurements

Connecting Rod Journals

Cyl-5 Cyl-1 Cyl-6 Cyl-2 Cyl-7 Cyl-3 Cyl-8 Cyl-4
Engine-1 2.04650 2.04655 2.04655 2.04650 2.04660 2.04655 2.04650 2.04660
Engine-2 2.04650 2.04655 2.04655 2.04650 2.04660 2.04660 2.04650 2.04650
Engine-3 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650
Engine-4 2.04660 2.04670 2.04650 2.04660 2.04640 2.04640 2.04650 2.04650
Engine-5 2.04650 2.04650 2.04650 2.04650 2.04640 2.04640 2.04640 2.04640
Engine-6 2.04670 2.04680 2.04670 2.04670 2.04670 2.04670 2.04670 2.04670
Engine-7 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650
Engine-8 2.04650 2.04650 2.04650 2.04650 2.04640 2.04640 2.04640 2.04640
Engine-9 2.04650 2.04650 2.04650 2.04650 2.04640 2.04640 2.04640 2.04640
Engine-10 2.04650 2.04650 2.04650 2.04650 2.04640 2.04640 2.04660 2.04660
Engine-11 2.04680 2.04680 2.04650 2.04650 2.04640 2.04650 2.04660 2.04670
Engine-12 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650 2.04650


Official Measurements

Min Max Official Min Dev. Max Dev.
Journal 2.04640 2.04680 2.04650 -0.00010 0.00030
Bearing 2.04815 2.04840 2.04820 -0.00005 0.00020
Clearance 0.00135 0.00200 0.00170 -0.00035 0.00030


Measurement Deviations

Journal Size Deviations
2.04630 0
2.04640 17
2.04650 53
2.04660 14
2.04670 9
2.04680 3
2.04690 0
2.04700 0


References

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