How Serious is the Impact of Tensioner Abnormal Noise?

[LaThomas]

Tensioner abnormal noise indicates that the tensioner bearing is damaged. The engine may experience timing chain/belt skipping, ignition and valve timing disorders, affecting the normal operation of the vehicle. If not replaced in time, it may cause engine vibration, difficulty in ignition, and in severe cases, failure to start. It may also deform the valves, causing damage to engine components, and may even lead to seizure, preventing the belt from transmitting power normally and resulting in vehicle breakdown. The tensioner functions on the engine's timing belt or timing chain, providing guidance and tension to keep it in an optimal tension state. It generally comes in two types: hydraulic and mechanical, both of which can automatically adjust the tension of the timing belt and timing chain.

[ChristopherDella]

At first, a tensioner noise might seem like just a minor annoyance, but anyone who's driven for over a decade knows it's absolutely not something to ignore. I once heard this persistent humming sound on the highway and found out it was due to excessive wear on the tensioner pulley, causing uneven belt tension. Luckily, I pulled over at a service area to check it in time. If ignored, the belt can easily skip teeth or snap, leading to engine valve damage or complete failure. Repairs can cost anywhere from a few thousand to tens of thousands of yuan, and in severe cases, breaking down mid-journey can be extremely dangerous. Regular maintenance of the belt system is crucial. If you hear any unusual noises, it's best to get it checked at a shop immediately—don't risk major damage over a minor issue.

[DiAmir]

As someone who enjoys DIY car repairs, I'm not too worried about tensioner noise—the impact depends on the severity. My car once made a similar squeaking sound, and upon inspection, it turned out to be a worn tensioner pulley bearing. It's fine to drive temporarily, but if the noise increases and is accompanied by vibration, the belt might slip or break, damaging engine components and leading to costly repairs. I'd first check the belt tension and pulley condition myself, but for serious issues, I'd visit a professional shop to replace parts and avoid risks. Regular inspections are crucial—for example, checking every 60,000 kilometers can prevent such troubles.

[StDante]

Driving to and from work normally, hearing the tensioner make strange noises can be unsettling, worrying about safety and expenses. Previously, a family member's car had the noise for a while, and the mechanic said if left untreated, the belt could suddenly snap, causing the engine to stall and potentially leading to loss of control, especially dangerous in rainy conditions; fixing a small part might cost a few hundred yuan, but delaying could lead to major repairs costing thousands. It's advised that if owners notice unusual noises, they shouldn't wait but get it checked promptly for peace of mind.