Hi all, I have an '01 Taurus with 167k miles on it. I've had it since new, and it's always been treated right. I always use Mobil 1 5w30, and change it every 5k miles with filter. I think my valvetrain is wearing out, as I'm hearing an audible tapping coming from the front valve cover, right near the water pump. If you put a long screwdriver on the closest valve cover stud to the water pump, you can hear a very distinct tapping that changes with RPM. I'm planning on pulling the valve cover this weekend, is there anything I can check that will point me in the right direction? I'm thinking the cam is wearing out, but maybe it could be valve springs?