Hello Jagexperts,
Can't believe what I have woken up to. My engine bay is filled with a most horrifying sound. Could it be the chains? Can I drive her? Here is the problem: https://drive.google.com/file/d/0B3t...ew?usp=sharing Will be grateful!

 

I'm not going to click on it, you click on the link...
I'll just say NO, don't drive it.

 

I would leave driving it to being very limited on an only if you ABSOLUTELY have to. I can't tell you exactly what it is, but I do know that it's never a good sign. Assume all the fluids are at the proper levels? I'd be worried that there might be a bearing going somewhere in the lower end, but it's hard to tell from a video.

 

It's probably internal, but just to be sure, remove the serpentine belt and start it briefly. That will eliminate the idler, tensioner, pump,etc.

 

Thank you gentlemen for the advice. Keep it coming.

 

I would also like to add that each time I revv the engine the knocking sound in the video is followed by about 4 clicks (which sound like the starter motor solenoid clicks when the car is about to be started).

 

That to me sounds like it could be a tensioner going out. There's only one way to find out! Don't keep starting the engine up until you've pulled a valve cover.