What does the '0.030' in the part number mean?

The '0.030' indicates that these piston rings are 0.030 inches undersize. This means they are intended for use in an engine where the cylinder bores have been machined (honed) to a larger diameter than stock, typically during an engine rebuild.

Why are moly rings beneficial?

Moly (molybdenum) coatings on piston rings help reduce friction and improve the initial break-in process. This can lead to a smoother running engine and potentially extend the service life of both the rings and the cylinder walls.

Are these rings compatible with all 4.0L Ford engines?

This specific ring set is designed for the 4.0L SOHC (Single Overhead Cam) engine found in certain Ford, Mazda, and Mercury vehicles. It is not compatible with other 4.0L engine variants, such as the OHV (Overhead Valve) version.

Mahle OE Piston Rings Moly Ring Set 42102CP.030

Name: Mahle Rings Ford 4.0L SOHC 2004 - 2010 Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-ford-4-0l-sohc-2004-2010-moly-ring-set-t14-49772
Price: 125.03 USD
Availability: BackOrder

Mahle Rings Ford 4.0L SOHC 2004 - 2010 Moly Ring Set

$125.03

On Backorder

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

Mahle Moly Ring Set for Ford 4.0L SOHC. Reduces friction and oil consumption for longer engine life.

Key Features

Fits a range of Ford, Mazda, and Mercury vehicles with the 4.0L SOHC engine.
Moly coating on the rings aids in break-in and promotes longer service life.
Designed to reduce friction and minimize engine oil consumption.
Built to meet original equipment specifications for reliable performance.
This is a 0.030 inch undersize ring set, intended for engines with honed cylinders.

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Will this fit your vehicle?

Product Details

These Mahle Moly Piston Rings are built to a 0.030 inch undersize, meaning they're ready for engines where the cylinder walls have been honed out slightly. This set is designed for Ford 4.0L SOHC engines, commonly found in vehicles like the Ford Explorer, Ranger, and Mazda B4000. Piston rings are crucial for sealing the combustion chamber, controlling oil, and transferring heat, and Mahle focuses on making them work efficiently.

Mahle engineers these rings to meet original equipment requirements, which means they aim to reduce friction and minimize engine oil consumption. By using moly coatings, these rings can help improve the break-in process and offer a longer service life compared to standard cast iron rings. This attention to detail helps ensure your engine runs smoothly and efficiently, keeping oil where it belongs and reducing wear over time.

This set is a solid option for rebuilding or refreshing your engine. Remember that these rings are not CARB approved and cannot be shipped to California.