cam chains are a chain the attach to the crankshaft and the cam shaft , the crankshaft is the shaft making the pistons go up and down the cam shaft makes the valves open and close, the crank shaft and cam shaft have to be aligned a certain way or the car will not fire, this is called "timing" . if your looking for where it is , its most likely in the front of the engine get a pro to look at it.
A Nissan 350Z has a timing chain but it depends on the year because the older 350Z's has timing belt
The 3.5 liter V6 engine in a 2004 Nissan 350Z has a timing CHAIN
cam chain
Cam chain
chain
chain
if its a single overhead cam it has a belt and if its dual it has a chain
chain
Chain
It has a chain.
Chain.
Timing chain