Mahle 41859CP Engine Piston Ring Set

Mahle 41859CP Piston Ring Set

Mahle 41859CP is a premium engine piston ring set built for 3.780 in bore applications that demand controlled oil use, low friction, and stable sealing. It uses a plasma-moly faced top ring, carbon steel second ring, and a stainless steel oil ring assembly for durable performance in GM truck and SUV engines.

Key Features

• Part number 41859CP for standard bore applications
• 3.780 in bore diameter
• Top ring material: carbon steel with plasma-moly face coating
• Second ring material: carbon steel, 1.50 mm axial height
• Oil ring assembly: stainless steel, shallow groove design, 3.00 mm axial height
• Premium item grade for engine rebuild and service work
• Engineered to reduce friction, control oil consumption, and support longer service life

Detailed Description

Mahle piston rings are developed around OE requirements, with attention to ring mass, friction reduction, and oil control. The 41859CP set uses a plasma-moly coated top ring for wear resistance, a carbon steel second ring for consistent sealing, and a stainless steel oil ring assembly with a shallow groove profile. This combination supports compression sealing and oil management in engines that need a standard-size ring package.

This part cross-references Hastings Piston Rings 2M4978 and Sealed Power E937K for the same application. It is a direct-fit choice for many Chevrolet Express 1500, Chevrolet Silverado 1500, GMC Sierra 1500, and GMC Savana applications where the listed bore and ring dimensions match.

What It Helps Address

• Excessive oil consumption from worn or tired rings
• Low compression caused by ring wear or loss of seal
• Blow-by that can affect crankcase pressure
• Reduced cylinder sealing during engine rebuilds
• Friction-related wear in high-mileage engines

Installation Notes

Verify bore diameter, ring thickness, and groove style before installation. Confirm the engine uses a standard 3.780 in bore and the listed 1.50 mm top and second ring dimensions with a 3.00 mm oil ring assembly. Clean ring grooves thoroughly, check end gaps to specification, and inspect cylinder wall condition before assembly. This part is listed for Chevrolet Express 2500, Chevrolet Express 3500, GMC Savana 2500, GMC Savana 3500, Chevrolet Silverado 1500, GMC Sierra 1500, and related GM truck and SUV platforms shown in the fitment data.

Quality Assurance

Mahle positions this piston ring set as a premium engine component built to OE-level technical standards. The design focus is on reduced friction, controlled oil consumption, and extended service life for rebuilds that require dependable sealing performance.

• Fits 2003-2016 Chevrolet Express 2500, N/A
• Fits 2003-2016 Chevrolet Express 3500, N/A
• Fits 2003-2016 GMC Savana 2500, N/A
• Fits 2004-2016 GMC Savana 3500, N/A
• Fits 2007-2014 Chevrolet Cheyenne, N/A
• Fits 2003-2014 Chevrolet Express 1500, N/A
• Fits 2014 Chevrolet Silverado 2500, N/A
• Fits 1999-2009 Chevrolet Silverado 2500, N/A
• Fits 2000-2014 Chevrolet Suburban 1500, N/A
• Fits 2000-2014 Chevrolet Tahoe, N/A
• Fits 2003-2014 GMC Savana 1500, N/A
• Fits 2007-2014 GMC Sierra, N/A
• Fits 2000-2014 GMC Yukon, N/A
• Fits 2000-2014 GMC Yukon XL 1500, N/A
• Fits 2007-2013 Chevrolet Avalanche, N/A
• Fits 1999-2013 Chevrolet Silverado 1500, N/A
• Fits 1999-2013 GMC Sierra 1500, N/A
• Fits 2009-2012 Chevrolet Colorado, N/A
• Fits 2009-2012 GMC Canyon, N/A
• Fits 2008-2010 Hummer H3, N/A
• Fits 2009-2010 Hummer H3T, N/A
• Fits 2008-2009 Buick Allure, N/A
• Fits 2008-2009 Buick LaCrosse, N/A
• Fits 2006-2009 Chevrolet Impala, N/A
• Fits 2005-2009 GMC Envoy, N/A
• Fits 2005-2009 Saab 9-7x, N/A
• Fits 2006-2008 Chevrolet Trailblazer, N/A
• Fits 2005-2008 Pontiac Grand Prix, N/A
• Fits 2004-2007 Buick Rainier, N/A
• Fits 2006-2007 Chevrolet Monte Carlo, N/A
• Fits 2007 Chevrolet Silverado 1500 Classic, N/A
• Fits 2007 GMC Sierra 1500 Classic, N/A
• Fits 2002-2006 Chevrolet Avalanche 1500, N/A
• Fits 2003-2006 GMC Envoy XL, N/A
• Fits 2003-2006 Isuzu Ascender, N/A
• Fits 2002-2005 Cadillac Escalade, N/A
• Fits 2003-2005 Chevrolet Trailblazer EXT, N/A
• Fits 2004-2005 GMC Envoy XUV, N/A
• Fits 2003 Chevrolet SSR, N/A
• Fits 1999-2000 GMC Sierra 2500, N/A