Timing Chain Rattle: Nissan, Infiniti 3.5 & 3.7L
If you're curious what that engine rattle coming from your Nissan is, have a listen to this video clip. The timing chain is of course not the only thing that can cause a rattle, but it is very common on these Nissan 3.5 liter engine, as well as the 3.7s.
If you're doing this yourself, I recommend buying only OEM parts from Nissan, but here is a link to a kit on Amazon to give you an idea of what you'll need.
https://amzn.to/2JXoZ5l
Here's some tools and supplies that I typically use on a job like this:
RTV sealant https://amzn.to/2JZEWYN
Coolant https://amzn.to/2K0iHlx
Razor blades https://amzn.to/2JZygd5