My 97 civic with 143xxx miles sounds like its got a very faint knock/tap cant tell were its commin from, ive tried the trick with the screwdriver up to the ear and couldnt really tell were its commin from, it sounds like its from the head, i pulled each plug wire and the nosie didnt really seem to go away, i dropped some oil from the pan and found little metal shavings but i also noticed that the plug was one of them self tapping plugs so penzoil must of put that in and im thinkin thats were the shavings were from, the shavings werent magnetic idk what they use for rod bearings if there aluminum or steel, just kinda worried on what it could be cause i know these y8's are notorius for spinning bearings, wonderin what yall think