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2. Timing belt (camshaft) - Wikipedia

   en.wikipedia.org/wiki/Timing_belt_(camshaft)

   While the chains themselves are subject to minimal wear, lubrication of the chain or failure of the tensioner and chain guides can cause maintenance issues. By contrast to rubber-based timing belts which give no indication of snapping while one is driving, early symptoms of a timing chain system becoming worn exist, and these include a rattling ...

3. Interference engine - Wikipedia

   en.wikipedia.org/wiki/Interference_engine

   A pair of poppet valves bent by collision with a piston after timing belt failure. The engine was running at 4500 RPM. In interference engine designs, replacing a timing belt in regular intervals (manufacturers recommend intervals ranging from 60,000 to 104,000 miles) or repairing chain issues as soon as they are discovered is essential, as incorrect timing may result in the pistons and valves ...

4. Gear train - Wikipedia

   en.wikipedia.org/wiki/Gear_train

   A chain, called a timing chain, is used on some automobiles for this purpose, while in others, the camshaft and crankshaft are coupled directly together through meshed gears. Regardless of which form of drive is employed, the crankshaft-to-camshaft gear ratio is always 2:1 on four-stroke engines , which means that for every two revolutions of ...

5. Highways are getting deadlier, with fatalities up 22%. Our ...

   www.aol.com/news/deaths-burns-brain-injuries...

   19% — 1 in 5 — shopped online while driving. The report also ticked off some advances being made using modern technologies that have gone mostly ignored by government regulators.

6. News, Politics, Sports, Mail & Latest Headlines - AOL.com

   homepage.aol.com

   Discover the latest breaking news in the U.S. and around the world — politics, weather, entertainment, lifestyle, finance, sports and much more.

7. Chain drive - Wikipedia

   en.wikipedia.org/wiki/Chain_drive

   Chain drive was the main feature which differentiated the safety bicycle introduced in 1885, with its two equal-sized wheels, from the direct-drive penny-farthing or "high wheeler" type of bicycle. The popularity of the chain-driven safety bicycle brought about the demise of the penny-farthing, and is still a basic feature of bicycle design today.

8. Trump tariffs rattle Wall Street — here's what the movers and ...

   www.aol.com/finance/trump-tariffs-rattle-wall...

   Trump the Tariff Man has struck, unsettling a ginned-up Wall Street that had expected 2025 to be a year of strong economic growth and further big gains for hot AI trades such as Nvidia and ...

9. Moment Elephant Walks Without Chains for First Time in 41 ...

   www.aol.com/lifestyle/moment-elephant-walks...

   Mare Noi was rescued from captivity recently, and luckily for us a new viral video shows her taking her first steps without chains in 41 years. Aaron Jackson has been documenting the many ...