nagging problem

[76bonanza]

I have a naging problem when I turn at slow speeds mostly when cold I get a rubbing sound almost like a playing card in a bike wheel. Checked all my clearences on the wheells all good and it does not do it all the time. Today I am looking for anything I notice the PO put a flexlite fan and spacer on, it is like 1 or 2 centimeters from the shroud on one side. My question is could slow turning be causing some kind of body or frame flex making the fan hit the inside of the shroud? Does this sound possible? Anyway loosened shroud and moved it like 1/4 inch so have like 1/4 inch clearence now hope that was it.

Thanks