Chains vs belts

Q In the May 2018 issue of Car Mechanics, Andrew Everett said that as long as they are simple to change, cambelts are a better proposition than chains. As an owner of a Vauxhall Corsa with a timing chain, this has left me a little concerned. Is there something inherently wrong with timing chains that I should be aware of? My vehicle is professionally serviced at the correct intervals. Does the chain need to be replaced at set intervals? L Warren

A The statement made was a general observation that many modern engines that use a timing chain to drive the camshafts suffer from problems, often due to the chain being too light for the job. A timing belt has a limited life and, as such, is normally changed before failure. There is no routine replacement interval for a timing chain, relying on the motorist to replace it when audible signs are heard from a slapping chain.

You do not mention the year or engine size of your Corsa, but ensuring that it is regularly serviced will mean the timing chain has the best chance of longevity. My idea of regular servicing is one year or 10,000 miles and I would not leave any vehicle for the twoyear/20,000 mile interval that some manufacturers seem to accept. I can’t specify a recommended mileage for a chain replacement, but it would be worthwhile changing it at the first signs of timing chain slap, replacing the chain, tensioner and chain guides.