I have a 2007 Acura TSX 4 cylinder 24 valve engine. Does it have a timing belt
or a timing chain. When should it be changed.
First of all, there is no 24 valve 4 cylinder engine. It is a DOHC engine with 16 valves. It has a timing chain and I've only replace timing chains when they get noise or break. If your chain breaks a lot of engine damage will occur.