Hey, I just bought a 2003 WRX with about 113k miles on it and after about 1 month I started to notice a ticking noise coming from the engine bay. When I first bought it, everything sounded fine, then I stopped driving it for awhile and when I started it up the other day it started ticking. I asked a friend and he said its probably the timing valves so I just need to get a tune-up. I'm wondering if it might be something else. The noise is coming from near the spark plugs area, so passenger side. I'm pretty sure the timing belt, water pump, and radiator haven't been changed either. If you guys have any advice that would be great. Thanks.