Just checked my oil and water etc as I was about to set off on a 200 mile round trip. On doing so I noticed the top two timing cover bolts were loose, a lower one actually about to come out (timing belt done in april). What's the liklihood these bolts will have worn loose rather than have been not tightened in the first place? Also can anyone tell my how many bolts are on the cover as I'll have to check now and in the pic above am I missing a nut? It seems to be just below the engine mount.