Join Date: Aug 2011
Location: Canberra-ish, Australia
I'm no mechanic. However I do recall reading that lack of noise is of more concern than more noise when it comes to valves. I recall that the reason is that the noise occurs when there is a lot of "slack" in the system, whereas everything goes quiet when it is all too tight which may lead to the valves becoming "mushroomed".
I am happy to be told I am wrong by someone more knowledgeable as this is an issue that i am also interested in.