sorry about late reply guys. after putting 4 litres in it, i started it up and with the first second the tapping stopped. i figured id run it a week before reporting back. seems i got out with a lucky escape. engine doesnt seem to of lost any power so far, no thats noticable anyway, tho i did fill it with regular instead of the torq stuff as the other pumps where all full, and the normal stuff can make it feel a little sluggy. tho if anything else unfoldes ill report back again. thanks for all the help.