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.
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)
|
0.0343 - 0.0381 mm
|
0.00135 - 0.00150 inch
|
| Bearing Clearance Tolerance
|
-0.0025 - +0.0013 mm
|
-0.00010 - +0.00005 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
|
| 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
|
| 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
|
0.0419 - 0.0483 mm
|
0.00165 - 0.00190 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
|
