There are two things to consider. Your engine uses a timing chain. If it is worn or the tension-er is not holding proper tension on it, the chain can rattle against the housing. An exhaust leak between the cylinder head and exhaust manifold can make a loud ticking sound that can sound like a rattle. That will only occur during acceleration or with a load on the engine.
There is a tool you might be able to borrow or rent from an auto parts store that borrows them called the "Chassis Ear". It is a set of six microphones, a switch box, and headphones. You clip the microphones to suspect points, then drive around while listening with the headphones. You can move the microphones around to zero in on the source of the noise. Be aware that many mechanics have never seen or even heard of this tool. Suspension and alignment mechanics use it to find rattles, squeaks, and other noises.
Wednesday, February 15th, 2017 AT 7:13 PM