What Does the Timing Belt or Timing Chain Do? On a conventional piston engine — which is found in virtually all modern passenger cars — the up-and-down motion of the pistons turn the crankshaft, and ...

It appears that the timing chains fitted to Nissan Navaras and Pathfinders with YD25 engines are week and stretch, and in most cases break with the valves hitting the pistons. The result is usually a ...

If the noise is a metallic rattling noise, then you might be on the right track here. But as well as the timing chain, it could also be the tensioner that keeps that timing chain tight at fault. The ...