20867751 Main Bearing | Genuine Volvo Penta Part

🔧 Product Description

Genuine Volvo Penta 0.25 mm Undersize Crankshaft Main Bearing - Part Number: 20867751

A genuine Volvo Penta 0.25 mm undersize main-bearing shell for crankshafts that have been professionally reground to the corresponding repair diameter. It is not the standard-size bearing. The shell supports the crankshaft journal on a pressurised oil film and restores the specified running clearance after crankshaft reconditioning.

Correct selection must be confirmed against the complete Volvo Penta product designation, product number and serial number because neighbouring engine variants can use different dimensions, connections, calibration or serial-controlled revisions.

⚙️ Key Features

• Genuine Volvo Penta 0.25 mm Undersize Crankshaft Main Bearing - part number 20867751

• 0.25 mm undersize repair bearing for a reground crankshaft journal

• Precision wall thickness restores the specified oil clearance

• Oil groove and feed-hole geometry align with the engine bearing saddle

• Bearing overlay and backing are designed for heavy-duty diesel loading

• Use only with a measured crankshaft and the matching undersize journal

• Crankshaft housing alignment, journal finish and clearance must be checked during assembly

• Order the required quantity and thrust-bearing components separately as specified by the engine manual

• Confirm the complete engine product number and serial number before ordering

🔄 Supersession & Cross Reference

OEM Supersession Chain:

• 20867751 (0.25 mm undersize OEM repair bearing)

OEM / Related Numbers:

• 20867751

• VOE20867751

• 85103708

• RM20867751

Aftermarket / Verified Equivalents:

• BPO: 0.25 mm undersize main-bearing kit corresponding to Volvo Penta 20867751 applications

🚤 Compatibility

Commonly used on:

• Heavy-duty Volvo Penta crankshaft main-bearing installations

Typically suits:

• Engine models:

• D9A2A

• D9A2B

• D9A2C

• D11A

• D11B

• D12B2-A and related Volvo Penta applications listing 20867751

• HP Range: Confirm by exact engine designation and serial number

• Engine Type: Heavy-duty Volvo Penta crankshaft main-bearing installations

• Year / Serial Range: Production period and serial breaks vary by model

• Application Note: 0.25 mm undersize repair bearing only. The crankshaft journal must be measured and reground to the matching repair diameter.

🔌 Function

The bearing carries radial crankshaft load while pressurised oil forms a hydrodynamic film between the shell and journal. The 0.25 mm repair size compensates for material removed during crankshaft grinding, returning oil clearance to the service specification.

Common signs of failure:

• Low oil pressure from excessive bearing clearance

• Knocking or rumbling from the crankshaft area

• Copper or bearing material in the oil and filter

• Bearing wiping, scoring or heat discolouration

• Crankshaft seizure or journal damage after oil-film failure

📦 Condition

• Genuine Volvo Penta part

• Brand new

• Supplied in original or equivalent packaging