Why We Need 3 Piston Rings | Compression, Oil Control, & Wiper Ring Differences Explained

A piston ring is a metallic split ring that is attached to the outer diameter of a piston in an internal combustion engine. They are typically positioned in grooves or slots on the piston itself. These rings serve as a sealing mechanism between the piston and the inner walls of the engine's cylinder.

Piston rings ensure that the combustion chamber, where fuel and air ignite to produce power, remains sealed during the engine's operation. This seal prevents any gas from escaping or oil from entering where it shouldn't be. This sealing action is essential for engine efficiency and performance.

Automotive piston engines typically have three rings per cylinder. The top two rings known as compression rings, are primarily for sealing the combustion chamber. The bottom ring known as the oil control ring, is primarily for controlling the supply of oil to the cylinder wall.

---- Time Stamp ---
00:00 - Introduction
00:58 - Functions of Piston Rings
01:26 - Types of Piston Rings
04:29 - Piston Ring Materials
05:10 - Why Piston Rings Fail?
06:10 - Blowby
06:54 - Life of Piston Rings
07:45 - Common Piston Rings Problems

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Disclaimer:
This video is for educational purposes only. We are not in the auto repair business nor publish automotive service manuals. This video is not reviewed or authorized by any vehicle manufacturer. This video is intended only as general guidance. Every system is slightly different, so refer to the owner’s manual of your vehicle for any specific information about your model. Remember that only proper service and repair procedures will ensure your car's safe and reliable operation.

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