Mercedes Sprinter Right Bank Piston Standard 83mm – Kolbenschmidt | NCV3 3.0L OM642 | #6420301217 (2007–2022)

A worn, scored, or damaged piston in the OM642's right bank reduces compression, increases oil consumption, and causes the misfires and power loss that can't be resolved without accessing the bottom end. This is the Kolbenschmidt right bank piston in standard 83mm bore size for NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine, sold individually for use in cylinders measuring within standard bore dimensions.

What This Part Does

The piston reciprocates within the cylinder bore, sealing the combustion chamber on the compression stroke and transmitting firing load through the connecting rod to the crankshaft on the power stroke. On the OM642 V6, the right bank has three cylinders, each requiring its own specific right-bank piston. The standard 83mm piston is sized for cylinders at factory bore specification — cylinders that have been bored oversize require the matching oversize piston (642030121754). When a piston is worn, cracked, scored from lubrication failure, or shows ring groove damage, replacement is required along with cylinder honing and new piston rings.

Common Reasons for Piston Replacement

• Cylinder scoring from oil starvation or overheating confirmed during engine teardown
• Piston crown damage from hydraulic lock or detonation
• Ring groove wear beyond specification during engine inspection
• Engine rebuild where pistons show wear beyond service limits

When to Use

Use when cylinders measure within standard 83mm specification. Always measure finished bore diameter and verify piston-to-wall clearance per factory specification before assembly. Order 3 units for a complete right bank rebuild.

NCV3 & VS30 OM642 Specific — Engine Verification Required

This piston is for the right bank of NCV3 and VS30 Sprinters equipped with the 3.0L OM642 V6 diesel engine. Always verify your engine code and bore size before ordering.

Fitment

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

✔ Right bank only — left bank requires #6420301517
✔ Standard 83mm — for cylinders at factory bore specification
✔ Sold individually — 3 required for complete right bank rebuild
✔ For oversize bores use #642030121754 (83.5mm)

Part Numbers

• Mercedes OEM: 6420301217 / A6420301217 / 642-030-12-17
• Manufacturer: Kolbenschmidt — 40095600
• SKU: 6420301217