Found this on the Bimmerforum
Found this on the Bimmerforum. I am going to try it after the engine cools down this evening.
"Adjusting the valves on the cam side is a great technique for a higher mileage enigne or one that didn't get a lot of love in its early life. Over time the valve stems can get some wear on them -- sort of a cupping. If you adjust for a cold .012 on the valve stem, you are not taking into account the "cupped" part of the stem where the eccentric actually makes contact because your feeler gauge is flat.
The cam side technique is essentially the same, but you measure between the rocker pad and the cam with the lobe pointed straight down at the cylinder. The best measurement I have found for this is .009. I tried .008 one time and it was too tight. The car idled poorly. Th idea is that .009 would be equal to a .012 on the valve side if there was no wear.
I recently had a valve that was very loud. The ticking was more of a clacking and it made me nervous. The conventional method of adjusting did not fix the problem. I went back and did the cam side adjustment and now the motor
sounds perfect. After adjusting to .009 on that valve (camside) I went and measured the clearance at the valve stem and it was .010. So that tells me that the engine has a little wear in the valve train. Anyway, hope this helps. There are some great technical write-ups on this stuff at mye28.com
Take it easy,
Paul"
Quote:
Originally Posted by
Kibokojoe
Readjusted the valves after removing and checking each eccentric cam for any flat spots. If there was a flat spot I could not see it. Still sounds terrible. Wonder if I have a sticking valve or two?