Looks like I'll be doing one of these timing chain tensioners any day now. It's not broken I just have 100,000 miles and once in a while an odd metallic sound when I start and turn the car off. I have to do the water pump any way. This top bloke gave me some advice already, but I wanted to know if anyone else out there has done one. Looks like the chain guide is going to get hit hard when the tensioner is released. ?????