I am making a new thread on this even though I have another, but I figured this would be better so people didn't get sidetracked by the other info posted before
Ok about a month ago this noise started but I was never able to pinpoint it. After doing a full tune up which included replacement of most of my pulleys it'* the only noise left so now I found it.
The ticking is coming from the front valve cover. This starts after the car get to operating temp but then gets loudest after a 15+ mile highway drive. It also only happens in park when revving if it does it underlies it must be a lot quiter as I can't hear it then.
Now tonight I notice that if I rev the car to 2k rpm the noise starts but if I hold it there is stops after a second or so. It does the same when I increase the speed to 3k, and so on.
Now I'm not much of a mechanic so this is where you come in. What are your thoughts. It seems dependent on oil pressure which makes since why I don't hear it under load or when I hold the rpm steady. Could it be the oil pump? A bad lifter? Worse?
Here is a video it'* not very noticeable without good speakers.this is it at its loudest.
2003 Pontiac Grand Prix Gtp - 3.8 Supercharged V6, 53,000 miles, 98% stock for now
1999 Pontiac Grand Am GT - 3.4L V6, 134,000 mile, SOLD
1994 Oldsmobile Cutlass Supreme Convertible - 3.4L DOHC V6, 87,000 miles, SOLD