Engine Specs - S54 Rod Bearings

Rod Journal Dimensions

Crankshaft Rod Journals	Metric Dimensions	SAE (Inch) Dimensions
Rod Journal Dimensions	48.9830mm	1.92846 inch
Rod Journal Variance	48.9750 - 48.9910 mm	1.92815 - 1.92878 inch
Rod Journal Tolerance	-0.0080, +0.0080 mm	-0.00031, +0.00031 inch

Bearings Specification, Dimensions, Clearance

OEM 439/440 Bearings

Production and Composition

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.
Composition: Trimetal lead/copper

Dimensions

Bearing Dimensions (439/440 Bearings)	Metric Dimensions	SAE (Inch) Dimensions
Bearing Width (Blue, Red)	15.8140 mm	0.62260 inch
Nominal Bearing Thickness (Top, Blue)	1.9990 mm	0.07870 inch
Nominal Bearing Thickness (Bottom, Red)	1.9939 mm	0.07850 inch
Bearing Thickness Variance (Top, Blue)	1.9964 - 2.0041 mm	0.07860 - 0.07890 inch
Bearing Thickness Variance (Bottom, Red)	1.9939 - 1.9939 mm	0.07850 - 0.07850 inch
Bearing Tolerance (Top, Blue)	-0.0025 - 0.0051 mm	-0.00010 - +0.00020 inch
Bearing Tolerance (Bottom, Red)	0.0000 - 0.0000 mm	0.00000 - +0.00000 inch

Bearing Clearance Specifications

Con Rod Clearance (439/440 Bearings)	Metric Dimensions	SAE (Inch) Dimensions
Rod + Bearing Dimensions	49.0364 mm	1.93057 inch
Rod + Bearing Variance	49.0271 - 49.0411 mm	1.93020 - 1.93075 inch
Nominal Rod Bearing Clearance	0.0511 mm	0.00201 inch
Bearing Clearance Variance	0.0361 - 0.0660 mm	0.00142 - 0.00260 inch
Bearing Clearance Tolerance	-0.0150 - +0.0150 mm	-0.00059 - +0.00059 inch
Bearing Clearance per Journal inch		0.00104 inch/inch
Bearing Clearance per Journal Inch Variance		0.00074 - 0.00135 inch/inch
Bearing Eccentricity	0.0127 mm	0.00050 inch
Bearing Eccentricity Variance	0.0076 - 0.0292 mm	0.00030 - 0.00115 inch
Bearing Eccentricity Tolerance	-0.0051 - +0.0165 mm	-0.00020 - +0.00065 inch