[Kevin 1G Drummer]

Sounds to me like it's lifter tick. Do you know if it has the stock lifters, or the revised 3mm ones in it? When I put my cams in I used the 3mm lifters, and I haven't had a problem with lifter tick since.

They're pretty easy to install, the only shitty thing is, that you have to pull the cams to do it. It's not a big deal though if you have the timing belt tool that takes the tension off the belt so you don't have to take the timing belt off.