First off I have to say that buying the cam lock tool kit is the best $$$ I have spent. I had an ongoing issue with oil leaking from somewhere around the intake pulley. I replaced the intake cam seal but it was still leaking. (Also did the exhaust cam seal as long as it was apart) Did some searching and found that it was probably either the intake pulley or the O-rings on the pulley. Luckily I found a set of O-rings on ebay (he only has 6 left) and when I removed it, I saw there wasn't one on the back of the pulley. So I put them on, torqued it down and went for a drive. No leaks!! Glad it was an easy fix .... didn't want to buy a new VVT pulley. They're not cheap!