Well, as you know from my other thread, my chain guides just disintegrated. I decided to take the engine out because it was covered in oil and the seals (rear and front and tranny) needed to be replaced. Now, the mechanic also ran a vanos test that couldn't complete and he suspected that the vanos might be faulty. So, since I have all apart I will change the vanos as well. I didn't plan to do this but I had no choice, the 8-10k quote to get it fixed or new used engine was not an option for me.