3875307 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta main bearing marked Std D, from the engine group, weighing 0.07 kg and listed for 5 applications on the MD series. Std D is the standard size in grade D, as against the 0.30 mm undersize bearing 3876430 and undersize kit 3876428.

🚤 Compatibility

Typically suits:

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

• Engine Family: MD

⚙️ Key Features

• Marked Std D - standard size
• 0.07 kg
• 5 applications on the MD series
• Undersize alternatives are 3876430 and the kit 3876428

🔌 Function

Carries the crankshaft in the block, 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

• This is the standard size - if the crankshaft has been reground, the 0.30 mm undersize bearing 3876430 or the kit 3876428 is what is needed
• Measure the journals and the fitted clearance rather than assuming the size, and never mix grades in one engine
• 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