So I have some top end noise from my 05 636 and I recently read a bunch of crap on the Internet and went and replaced the timing chain tensioner. Didn't fix anything . So I checked the valve clearance and found only one valve was off by .02 mm . That's ridiculously small . So I decided to put it back together because I didn't want to risk breaking it or waste time taking everything apart just to fix .02 mm. I decided that I felt ok knowing that nothing is way out of spec and I won't blow my motor up.... Just wanted some thoughts......???