875491 Big-End Bearing Kit | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta big-end bearing kit in the standard grade, weighing 0.048 kg and listed for 8 applications across MD and AQD series engines. It supersedes part number 803353, catalogued earlier as a bearing shell rather than as a kit. It heads a graded set in this run: 875492 is the 0.25 mm undersize and 875493 the 0.50 mm undersize. Order by the grade stamped on the old shells and the measured crankpin size — the published weights do not separate a graded bearing set.

🚤 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

• Standard grade
• 0.048 kg
• Listed for 8 applications across MD and AQD series engines
• Supersedes 803353, catalogued earlier as a bearing shell
• 0.25 mm undersize is 875492 and 0.50 mm undersize is 875493
• Quantity varies by assembly, most commonly two

🔌 Function

Carries the connecting rod on the crankpin, holding it on an oil film and transmitting the firing load to the crankshaft.

⚠️ Common Signs of Failure

• Knock from mid-engine that is loudest on the overrun
• Oil pressure down, especially hot at idle
• Bearing material or copper flakes in the sump or filter
• Shells scored, wiped or with the underlay showing at the parting line
• Crankpin clearance measuring beyond limits

🛠️ Service Notes

• Measure the crankpins and read the grade on the old shells before ordering — 875492 and 875493 are the undersize grades and mass is no guide between them
• Renew the big-end bolts if they are of the stretch type, and tighten to the specified method rather than to feel

🔄 Supersession & Cross Reference

OEM Supersession Chain

• 875491 → Supersedes 803353

OEM / Related Numbers

• 803353 earlier number superseded by this part

📦 Condition

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