I have a 94 940Ti, and lately have been hearing an intermittent valve noise. It is related to RPM, but is much slower than I think it should be if it were just a valve.... it sounds like a mechanical click, and it varies with higher speeds. Seems to be much more prevalent at colder temperatures of the engine.
Additionally, since my car started doing this (about two weeks ago) it has gotten noticeably slower. It feels like it has the power of my 740!
Today I ran the engine up to about 2000 RPM and listened to the engine. When i put the stethescope onto the different parts of the exhaust manifold, i could hear some of the ticking. It was evenly distributed throughout both the manifold and the top of the valve cover. What could be making it tick like this and lose power? My initial guess was some sort of leak in the exhaust system, since that would impair the turbo, but where else (andïhow else) should I look? i didn't feel any exhaust when i was looking today...
Thanks for your help.
Aaron Singer