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

The 'Moly' refers to Molybdenum, a material often used as a coating on piston rings. This coating helps to reduce friction between the ring and the cylinder wall, which can improve engine efficiency and extend the life of both components.

Are these rings a standard size?

No, this specific set is 0.020 inch undersize. This means the rings are slightly smaller than standard size, which is important for proper fitment in engines that may have had previous wear or have been bored out to a specific size.

What is the benefit of minimizing oil consumption?

Minimizing oil consumption helps keep your engine cleaner internally, reduces the need for frequent oil top-offs, and can prevent issues like oil fouling spark plugs or contributing to emissions problems. It's a key indicator of a healthy engine seal.

Mahle OE Moly Ring Set 41473CP.020 - GMC 2.8L 3.1L

Name: Mahle Rings GMC Pass 173 2.8L Eng 87-89 189 3.1L Eng 88-93 GMC Trk 189 3.1L Moly Ring Set
Brand: Mahle OE
SKU: mahle-oe-mahle-rings-gmc-pass-173-2-8l-eng-87-89-189-3-1l-eng-88-93-gmc-trk-189--t14-49288
Price: 58.39 USD
Availability: BackOrder

Mahle Rings GMC Pass 173 2.8L Eng 87-89 189 3.1L Eng 88-93 GMC Trk 189 3.1L Moly Ring Set

$58.39

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 Piston Ring Set for GMC 2.8L and 3.1L engines. Reduces friction and oil consumption for longer engine life.

Key Features

This set is 0.020 inch undersize.
Features a moly coating to reduce friction and wear.
Designed to minimize engine oil consumption.
Contributes to a longer service life for your engine.
Built to meet original equipment manufacturer requirements.
Fits a wide range of Buick, Chevrolet, GMC, Oldsmobile, and Pontiac vehicles with 2.8L and 3.1L engines.

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Will this fit your vehicle?

Product Details

These Mahle OE Moly piston rings are built with a specific focus on reducing friction and minimizing oil consumption, aiming for a longer service life in your engine. They are designed to meet the demanding requirements of original equipment manufacturers, incorporating advanced technology for improved performance. This set is a direct fit for a wide range of vehicles, including many GMC, Chevrolet, Buick, Oldsmobile, and Pontiac models from the late 80s and 90s, specifically those equipped with the 2.8L and 3.1L engines.

The moly coating on these rings is a key feature, helping to create a solid seal against the cylinder wall while also reducing wear and friction. This translates to a more efficient engine operation and can help prevent issues like excessive oil burning. Mahle has a reputation for producing technically advanced piston rings, and this set continues that trend by focusing on the critical aspects of engine health and longevity. They are a well-built option for anyone rebuilding or refreshing their engine.

When installing these rings, remember they are sized at 0.020 inches undersize, which is important for proper cylinder wall preparation and piston fit. Always refer to the manufacturer's installation instructions for precise details on fitting and break-in procedures to ensure optimal performance and durability.