So I just did a top end rebuild on my EA82, sent the lifters to Mizpah, brand new oil pump and seals, and I still seem to have a tick. Now I didn't have one before the rebuild, I did it due to a bad head gasket. Now it's really loud. I've driven it about 20 miles, probably 45 minutes of run time. The one thing I messed up on was that I didn't go to the dealership for the genuine cam tower o rings, but I would think that a regular o ring wouldn't cause this until later down the road. From what I'