knocking or tapping noise accompanied with smoke coming from under hood. Car is not overheating according to the temperature gauge, so I don't know what the problem is.
Video of the noise: https://sendvid.com/bn4y9eov
2007 infiniti m35- 168,768 miles
This is your 3rd reminder about titles.
Here is an illustration of the title box: (filled out with an example of an appropriate title)

Here is a direct link to the help page I sent you to before (you apparently had trouble finding it at the top of the list of topics): https://carkiller.com/scottykilmer/qa/read-this-first/
I don't know what the problem is.
that is the sound of engine parts banging against each other. Engine parts are not supposed to hit each other. You either have no oil in the engine, or the engine is in extremely bad shape, and it will soon completely self destruct and start ejecting parts and dropping pieces on the road.
