ACL Race BMW M5 S85B50 V10 conrod bearing set +0.025 mm

Key Features & Benefits – ACL Race BMW M5 S85B50 V10 conrod bearing set +0.025 mm

ACL Race BMW M5 S85B50 V10 conrod bearing set +0.025 mm is intended for BMW S85B50 V10 applications with a tri-metal bearing design. Functional compatibility: a conrod bearing set where fit is driven by journal size, rod housing size and measured oil clearance.

The design targets higher-RPM operating conditions and uses a reduced-thickness overlay approach to support fatigue properties. The set uses identical halves, keeping pairing straightforward during assembly.

When is this useful?

The +0.025 mm oversize is used when your measured crank pin and rod housing condition calls for this size to reach the planned oil clearance in a rebuild.

Technical specs

• Type: Conrod bearing set
• Application: BMW M5, S85B50 V10
• Size: +0.025 mm oversize
• Part number: 10B1580H0-025
• Construction: Tri-metal
• Tunnel: 56.000–56.013 mm
• Shaft: 51.975–51.991 mm
• Max wall: 1.998 mm
• Max length: 15.9 mm
• Half type: Identical halves

Selection & installation tips

• +0.025 mm check: Measure crank pin journals and confirm +0.025 mm is the correct oversize for your rebuild.
• Housing & tunnel: Check rod housing size and roundness, then compare it to the listed tunnel range.
• Oil clearance: Verify oil clearance during mock-up using the same measurement method across all rods.
• Bearing seating: Even with identical halves, confirm proper seating and clean locating tang engagement.
• Clean assembly: Clean oil passages and mating faces, then use assembly lube before first start.

Before final assembly, verify +0.025 mm sizing, tunnel and shaft ranges, bearing seating and measured oil clearance, then compare them to the technical specs listed above.