They found lots of broken pieces in the oil pan. So I clearly needed to have this done, even though I was hearing no warning signs. I just decided to have them go in and measure stretch in the timing chain and tell me what they found because I wasn't sure whether the previous owner had done a chain or not.

I am having great trouble making my mechanic understand this whole oil filter check valve thing. I've made printouts of comments from these forums, one of which referenced a service bulletin.

Does anyone know what part # they need? Perhaps that will help them figure out what needs to be done. That said, I don't have any wacka-wacka sounds.