Mahle Rings CP20 Oil Ring Expanders 4.650 Bore x 3.0MM Plain Ring Set

Mahle OE offers these CP20 oil ring expanders, designed for a 4.650 inch bore and a 3.0mm ring size. These expanders are a key part of the piston ring assembly, helping to ensure the oil control ring seals properly against the cylinder wall. Proper oil control is crucial for engine health, preventing excessive oil consumption and maintaining good compression.

These expanders are well-built to handle the stresses within the engine cylinder. They work with the oil ring to maintain consistent tension, which is important for scraping oil from the cylinder walls during the piston's downstroke. This helps keep the combustion chamber clean and prevents oil from entering the intake or exhaust ports.