First thing to do is check all the spark plugs to make sure none of the plugs are loose. Second, could need a valve adjustment .
And it would disappear after 5 min.?It's really hard to say without hearing it. But the first thing that comes to my mind is a valve needing adjustment. This is just a wild guess.
Glad to help.That's honestly what I thought it was, but wanted to see what you all thought. I haven't replaced the timing belt yet, looks like I'll be having that done this weekend. Thank you so so much!!