What does the 'Moly' in Moly Ring Set refer to?

Moly refers to Molybdenum, a material used as a coating on the piston rings. This coating helps to reduce friction between the ring and the cylinder wall, which can lead to improved efficiency and longer ring and cylinder life.

Why is it important to have the correct piston ring size?

Piston rings create the seal between the piston and the cylinder wall. Using the correct size ensures a proper seal for optimal compression, prevents oil from entering the combustion chamber, and avoids excessive wear on the cylinder walls and rings themselves.

What does '.030' mean in the part number?

The '.030' indicates that this set of piston rings is 0.030 inches undersize. This is typically used when cylinder walls have been honed or bored out during an engine rebuild to account for wear or to achieve a specific clearance.

Mahle OE Piston Rings 41859CP.030 - Moly Ring Set

Name: Mahle Rings GMC Trk 4.8L/5.3L 1999-2004 Moly Ring Set
Brand: Mahle OE
Price: 55.69 USD
Availability: InStock

Mahle Rings GMC Trk 4.8L/5.3L 1999-2004 Moly Ring Set

$55.69

On Backorder

Order now to reserve yours — we'll ship as soon as stock arrives. Full refund if we're unable to fulfill.

Mahle OE Moly Ring Set for GMC 4.8L/5.3L engines. Features advanced moly coating for reduced friction and longer life.

Key Features

This set is 0.030 inch undersize.
Features a moly coating for reduced friction and improved wear resistance.
Designed to minimize engine oil consumption.
Contributes to a longer service life for your engine components.
Built to meet OE requirements for reliable performance.
Fits a wide range of GMC and Chevrolet trucks and SUVs with 4.8L and 5.3L engines.

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Will this fit your vehicle?

Product Details

If you're rebuilding the top end of your 4.8L or 5.3L V8 engine, getting the right piston rings is crucial for proper sealing and oil control. This Moly Ring Set from Mahle OE is designed to meet the demands of modern engines, focusing on reducing friction and minimizing oil consumption for a longer service life. These rings are a popular choice when you need reliable performance for your engine rebuild.

Mahle has engineered these rings with a moly coating, which is a solid option for reducing wear between the piston ring and cylinder wall. This advanced coating helps to keep friction low, allowing your engine to run more efficiently. Minimizing oil consumption is also a key benefit, helping to keep your exhaust cleaner and reducing the need for frequent oil top-offs. This set is designed to fit right into a wide range of GM trucks and SUVs from the early 2000s, like the Chevrolet Silverado or GMC Sierra, ensuring a proper seal for optimal compression.

This set is specifically sized at 0.030 inches undersize, which is important to note for your engine build. Always refer to your vehicle's specific service manual for correct ring sizing and installation procedures to ensure the best possible outcome for your engine rebuild.