just wondering if anyone else has experienced this?. iv got a v3 sti and when you drive after starting it cold it knocks slightly while it warms up. sometimes it will last for 10 mins or so driving. its only really noticeable when you take off at low revs, after then the engine noise covers it. could this just be piston slap?
also, i have found when my car idles even when warm im getting a strange knocking/tapping that comes and goes. i.e it will knock 10 or 20 times with the engine revolving then go away and randomly come back at a later stage. at high revs it sounds pretty smooth and i cant notice any knocking. ive never heard bearing noise apart from peoples videos on youtube, but could this be bearings or would they make a constant knock and get worse with revs?