Mercedes Sprinter Connecting Rod Bearing Set 0.25mm Oversize – Kolbenschmidt | NCV3 3.0L OM642 | #6420300260025 (2007–2022)

When the OM642's crankshaft rod journals have been worn beyond standard clearances and require grinding to restore a true surface, standard rod bearing shells will not restore proper clearance — undersized journals need matching oversize shells. This is the Kolbenschmidt connecting rod bearing set in 0.25mm oversize for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6, for use after crankshaft rod journals have been precision-ground 0.25mm undersize.

What This Part Does

The 0.25mm oversize rod bearing shells are dimensioned with a thicker backing that compensates precisely for the material removed when grinding rod journals 0.25mm undersize, restoring the correct oil film clearance at each connecting rod. These shells match the OM642's six rod journals after first-stage precision grinding and allow the bottom end to be rebuilt to factory clearance specifications.

When to Use

Use only after crankshaft rod journals have been precision-ground 0.25mm undersize. Always confirm journal diameter with a micrometer and verify clearances with plastigauge before final assembly.

Fitment

• 2007–2018 Mercedes-Benz / Dodge / Freightliner Sprinter 2500 / 3500 – 3.0L OM642 (NCV3)
• 2019–2022 Mercedes-Benz Sprinter 2500 / 3500 – 3.0L OM642 (VS30)

✔ 0.25mm oversize — for use only after rod journals have been precision-ground
✔ Complete set — upper and lower shells for all 6 rod journals

Part Numbers

• Mercedes OEM: 6420300260 / A6420300260 / 642-030-02-60
• Manufacturer: Kolbenschmidt
• SKU: 6420300260025