3876430 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta main bearing 0.30 mm undersize, from the engine group, weighing 0.072 kg and listed for 5 applications on the MD series. The same size as a kit is 3876428, and the standard size bearing is 3875307, marked Std D.

🚤 Compatibility

Typically suits:

• Volvo Penta MD7B
• Volvo Penta MD6A
• Volvo Penta MD6B
• Volvo Penta MD7A
• Volvo Penta MD67C

• Engine Family: MD

⚙️ Key Features

• 0.30 mm undersize
• Single bearing rather than a kit
• 0.072 kg
• 5 applications on the MD series
• Kit version is 3876428
• 0.3mm (Volvo assembly listing)

🔌 Function

Carries the crankshaft in the block at the 0.30 mm undersize, holding it in line and giving the oil film a surface to run on.

⚠️ Common Signs of Failure

• Deep knock from low in the engine under load
• Low or falling oil pressure, worst when hot
• Bearing shells scored, copper showing through or wiped
• Metal glitter in the oil or on the filter element
• Crankshaft journals measured out of tolerance

🛠️ Service Notes

• Only for a crankshaft reground to 0.30 mm undersize - the standard size is 3875307
• For a full set order the kit 3876428, which carries the same undersize and only 14 grams more published weight
• Fit shells dry into a clean housing, oil the running face only, and torque the caps to specification

📦 Condition

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