How do you troubleshoot a ticking valve (problem resolved)
My son's 91 735i m30 engine has had a ticking noise in the engine since we bought it almost two years ago. I have adjusted the valves 4 times now and it still ticks. I have inspected the cam, rocker arms and tops of the valves and can not see anything deformed, flat, cracked or broken. When I first opened the valve cover I did find that the front oil tube bolt had fallen out, so I am sure this has something to do with the problem. How can you troubleshoot a problem valve? Can you run the engine with the valve cover off while pressing on each rocker arm to determine the source of the tick? I am almost to the point of pulling the head and having it rebuilt but I don't want to go through this added expense if it is not the source of the problem.
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