In a conventional application, there are three rings per piston. The top ring is called the compression ring. Its purpose is to seal the combustion gas pressure, transfer heat from the piston to the ...

Most of us consider piston rings little more than a necessary evil. That's probably because grinding rings is a time-consuming chore. And who hasn't accidently ground a gap too large and wasted both ...

Kia is recalling over 100,000 vehicles due to issues involving the piston oil ring. The affected vehicles are Kia MY SOUL and Seltos from 2021, 2022 and 2023 that are equipped with a 2.0L Nu MPI ...

CARS.COM — Vehicles affected by service bulletin: The problem: Under certain operating conditions, the engine in certain Accords may develop deposits on the piston’s oil control rings, which may lead ...

SAE International Journal of Engines, Vol. 9, No. 3 (September 2016), pp. 1807-1824 (18 pages) ABSTRACT The oil control ring (OCR) controls the supply of lubricating oil to the top two rings of the ...

You might overlook the end gaps of piston rings in your car. They shouldn't be taken so lightly, though, as they actually play a vital role in your engine.

The new oil-free air compressor from Mahle uses a Nikasil-coated cylinder with a Teflon piston ring and a sliding lacquer coating on the piston skirt to eliminate the need for oil lubrication ...