Truth. That noise doesn't sound like my failed bearings.If it only happens when it's cold outside and it goes away after about a minute, could be secondary air pump, the mushroom shaped thing on right side above exhaust manifolds. Put your hand on it and feel if it's vibrating (pumping air into head) while you hear the noise. Doesn't sound like VANOS rattle or lifter tick to me. Could be you're low on oil (check dipstick) or your timing chain tensioner has failed. Mayyyybe it could be a failed belt tensioner or idler pulley, but I suspect those usually make more of a squeal or screech when they're failing.