What does 0.50mm undersize mean for these pistons?

An undersize piston is intended for use when the engine's cylinders have been machined (bored out) to a larger diameter than their original size. This 0.50mm undersize means the cylinders should be bored to a diameter that is 0.50mm larger than the factory specification to ensure a proper fit.

Are the piston rings included with this set?

Yes, these Mahle OE pistons come with the piston rings already mounted onto the pistons. The set also includes the necessary wrist pins and clips for a complete installation.

What is the benefit of an expansion-controlled design?

An expansion-controlled design helps the piston manage its size changes as the engine heats up. This allows for tighter initial clearances, which can lead to reduced engine noise, less wear over time, and improved oil control, especially during cold starts.

Mahle OE Piston Set 2243625050MM - 3.6L V6

Name: Mahle OE GM High Feature 3.6L V6 LY7 Eng MALIBU/EQUINOX 0.50 MM Piston Set (Set of 6)
Brand: Mahle OE
SKU: mahle-oe-mahle-oe-gm-high-feature-3-6l-v6-ly7-eng-malibu-equinox-0-50-mm-piston--t14-53126
Price: 386.92 USD
Availability: BackOrder

Mahle OE GM High Feature 3.6L V6 LY7 Eng MALIBU/EQUINOX 0.50 MM Piston Set (Set of 6)

$386.92

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 GM 3.6L V6 piston set, 0.50mm undersize. Features compensated ring grooves for better oil control and reduced engine noise.

Key Features

Fits 2004-2012 Buick, Cadillac, Chevrolet, GMC, Pontiac, and Saturn vehicles with the 3.6L V6 LY7 engine.
Pistons are 0.50mm undersize, intended for use after cylinders have been bored to this dimension.
Features compensated ring grooves for proper ring loading and improved oil control.
Expansion-controlled design helps reduce engine noise and wear by managing thermal expansion.
Includes pre-mounted piston rings, wrist pins, and clips for easier installation.
OE quality from Mahle, a leading original equipment piston manufacturer.

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Will this fit your vehicle?

Product Details

These Mahle OE pistons are built to a 0.50mm undersize, meaning they are designed for engine rebuilds where the cylinders have been bored out to match this specific dimension. They are made for the 3.6L V6 LY7 engine, a popular choice in many GM vehicles like the Chevrolet Malibu, Equinox, and Buick LaCrosse, among others. Mahle is a major OE piston manufacturer, so you're getting parts that meet the original equipment specifications for your engine.

What sets these pistons apart are features like compensated ring grooves. This design ensures the piston rings are loaded correctly, which is crucial for good oil control and maintaining proper compression. They also incorporate an expansion-controlled design. This means the piston is engineered to manage its thermal expansion, allowing for tighter initial clearances. Tighter clearances help reduce engine noise, minimize wear over time, and can even contribute to lower emissions and better oil management, especially when the engine is cold.

Mahle makes it convenient for engine builders by offering these pistons ready for installation. They come with the piston rings already mounted, and the necessary wrist pins and clips are included. This means you can get straight to work on your engine rebuild without needing to source those smaller components separately.