MAHLE 42191.020 Chrome Piston Ring Set Chrysler/Dodge Sprinter 3.0L V6 Diesel OM642 +0.020"

The MAHLE 42191.020 is a premium chrome piston ring set engineered specifically for the Chrysler/Dodge Sprinter 3.0L V6 diesel engine (OM642). This is the +0.020" oversized version, designed for use during engine rebuilds where the cylinder bore has been machined 0.020" over standard. The standard bore for this application is 3.267" (83.00mm), making this set suited for a 3.287" bored cylinder.

Key Features:

• Chrome ring set optimized for the Mercedes-Benz OM642 3.0L V6 diesel platform used in Dodge/Chrysler Sprinter vans
• Pre-lapped rings seat immediately upon startup, virtually eliminating traditional break-in time
• Ring thickness: 2.0mm / 2.0mm / 2.0mm (compression / intermediate / oil control)
• Barrel-faced compression rings with CNC-controlled gap chamfer for optimized compression and reduced blow-by
• Reverse-twist intermediate rings for superior groove side sealing with taper race machining for enhanced contact
• CP-20 oil ring assemblies featuring a 20-degree ear angle for maximum side seal against the cylinder wall and chemical-polished expander for improved oil drain-back
• Ring materials, coatings, and tension are all optimized for reduced friction and extended service life
• Designed and manufactured to OEM specifications — MAHLE is an original equipment supplier to the world's major diesel engine producers
• Sold as a complete set

MAHLE Original piston rings are among the most technically advanced in the industry, driven by OE engineering standards focused on reducing friction and ring mass while minimizing oil consumption and maximizing longevity. Whether performing a routine rebuild or a full engine overhaul on the OM642 diesel, the 42191.020 ring set delivers factory-quality sealing and performance confidence.