875485 Main Bearing Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta main bearing kit in the 0.25 mm undersize grade, weighing 0.166 kg and listed for 8 applications across MD and AQD series engines. It is the reground-crank partner to the standard kit 875483 on the same 8-application listing.

🚤 Compatibility

Typically suits:

• Volvo Penta MD1B
• Volvo Penta MD2B
• Volvo Penta MD3B
• Volvo Penta MD11C
• Volvo Penta MD11D
• Volvo Penta AQD2B
• Volvo Penta MD17C
• Volvo Penta MD17D

• Engine Family: MD, AQD

⚙️ Key Features

• 0.25 mm undersize grade
• 0.166 kg
• Listed for 8 applications across MD and AQD series engines
• Standard-grade equivalent on the same listing is 875483
• Order by measured journal size, not by weight
• 0.25mm (Volvo assembly listing)
• 2 used per assembly

🔌 Function

Carries a crankshaft reground 0.25 mm undersize in the block, holding it on an oil film and taking the load from each firing stroke.

⚠️ Common Signs of Failure

• Oil pressure low or falling away when the engine is hot
• Deep knock or rumble from the bottom end under load
• Bearing material or copper visible in the sump or filter
• Shells scored, wiped or showing the underlay
• Measured clearance beyond limits on a crank already reground

🛠️ Service Notes

• Measure the journals before ordering — this is the 0.25 mm undersize kit and the standard grade is 875483, with 875489 covering 0.50 mm undersize on the 7-application listing
• Confirm the crank has actually been reground to this grade; grinding marks are not proof of size
• Fit shells dry into clean housings, oil only the running face, and tighten to the specified sequence

🔄 Supersession & Cross Reference

Aftermarket / Verified Equivalents

• Crom: 111468

📦 Condition

• Genuine Volvo Penta part
• Brand new
• Supplied in original or equivalent packaging