5M1538H-.025

The unique combination of design, metallurgy and engineering come together to deliver what drivers expect from high performance Trimetal engine bearings.

Designed to withstand higher RPM conditions, ACL Race Series Engine Bearings are available for many of the popular 4, 6 & 8 cylinder applications and feature:

• High strength overlay plate with reduced thickness for improved fatigue properties
• Hardened steel backs on all rod bearings to improve the support of the bearing lining and assist with bearing retention in the housing.
• Increased crush for improved bearing retention
• Elimination of flash plating on the back of the bearings to improve heat transfer through the bearings and to maximize the grip between the bearings and its housing.
• Increased eccentricity to compensate for bore distortion at high rpm and to assist in the formation of hydrodynamic oil films.
• 3/4 grooved Main Bearings to optimize bearing load carrying surface area and oil flow to the conrod bearings.
• Tight consistent wall tolerances to help you maintain consistent clearances.
• Enlarged ID chamfers on bearing edges where required to accommodate large fillet radius on performance crankshafts.

Tunnel [mm]	65.000/65.019
Shaft [mm]	59.971/59.990
Max. Wall	2.488
Max. Length	20
Half type	Upper & lower
Note	Lower has 2 notches. Set has a pair of flanged thrust bearings.

Compatibility
BMW	3 (E30)	318 is	1989 - 1991	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	3 (E36)	318 i	1992 - 1995	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	3 (E36)	318 is	1993 - 1995	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	3 Compact (E36)	318 ti	1994 - 1995	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	3 coupe (E36)	318 is	1992 - 1995	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	3 Convertible (E30)	318 i	1990 - 1992	M42B18	4	5M1538H	1796 cc	DOHC v16	-.025
BMW	318i	DOHC 16v		M42B18	4	5M1538H	1796 cc	DOHC v16	-.025