Does the Corolla engine have a timing belt?

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The Corolla engine uses a timing chain. Under normal circumstances, it is maintenance-free for life. Rubber timing belts, along with other components such as tensioners, tensioner pulleys, and water pumps, can wear out or deteriorate as the engine operates. Functions of the timing chain: 1. It drives the engine's valve train. 2. The upper part connects to the timing gear on the engine cylinder head, while the lower part connects to the crankshaft timing gear, ensuring that the engine's intake and exhaust valves open and close at the right time to allow normal air intake and exhaust. Advantages of the timing chain: 1. The chain-driven method offers reliable transmission, excellent durability, and space-saving benefits. 2. The hydraulic tensioner automatically adjusts the tension, keeping the chain tension consistent and requiring no maintenance throughout its lifespan, matching the engine's longevity while improving safety and reliability. 3. It reduces the engine's usage and maintenance costs.