Does the Volvo XC70 have a timing belt or chain?

The Volvo XC70 uses a timing chain rather than a timing belt. Because it uses a timing chain, it usually doesn't need to be replaced unlike the belt. The only reason why it would ever need to be replaced is because of total failure but that doesn't happen too often. The reason why belts need to be replaced and chains don't is because that the belt is outside of the engine and is exposed and the chain is in the engine and not as exposed and gets help with lubrication from engine oil. I think Volvo made a pretty smart move by using the chain rather than the belt because of that sole reason.