So....I bought a 2006 that needed some work. Low miles..106K with a 5 speed. Pulled the engine out and it had a timing failure, Bought a kit from eBay for $80 (diamond) and followed several online guides. Replaced the clutch and pressure plate. Put the engine back in and it runs great. The problem is a tapping or clicking sound on the drivers side valve cover. Drove it for about 500 mikes over a few weeks and decided that it must be the lash lifter adjusters. Ordered a set and when I pulled the valve cover I found a one inch piece of the metal part of the lower guide laying in the head. I went ahead and replaced the lash adjusters and it did not help the clicking sound. My question is this, did I get a bad guide and I just need to replace the broken part or did I do something when installing the timing parts? Also, should I replace all of the parts or just the part that broke? I am a little sick. The last thing I want is to pull the engine back out and start over. I would like to drive this Mustang to work and have a little fun with it. I have ordered the Cloyes kit for $250. Im hoping better parts will be the medicine. Has anyone had this happen.