Grinding or rattling noise from under your bonnet

A defective belt tensioner is a common cause of noise coming from under the cars bonnet.

Belt tensioner/adjuster of a 2003 Toyota Avensis

This is one of the symptoms of a failing/bad drive belt tensioner. Other noises associated with a bad tensioner include squealing, squeaks or whirling, which indicates that the spring inside the tensioner is weakening, or that the belt is loose.

Your tensioner works to tighten the engine drive belt which transfers power through pulleys to the alternator, AC compressor, water pump and power steering. As with shock absorbers, tensioner loses their strength and efficiency over time. When they do, failure to replace belt or tensioner can lead to engine breakdown.

Suspect your tensioner may be bad?

Get an expert to examine it and recommend appropriate repairs. You can schedule an appointment today at OR call us on for inspection at your home or office.

Suspecting any related issues?

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