tried some spks i had in the holes today, 13cms is right, im going to fit them properly tomorrow, the grille even still fits, with the spks i have anyway, if you have a dremel or that kind of thing you may need to cut off the bit where you would screw the spks down ( the bits you would use if screwing them to a door/pod/parcel shelf) or the grille clips may be blocked but you may be lucky, like me. you wont need to screw them, the grill should do the holding down, im yet to see if the spk cone will hit the grille though, tommorow will tell!
yeah ill take it back to him, he is a friend of the family so he should be sound about it even if the engine does go bang, he has business insurance! he said it was to do with the way the tensioner worked or something, i queried it at the time, he said he set the belt tight to allow for it to slacken, as if it slackened and it was set right then it would then be too slack, if that makes sense. the noise did go away, just like he said, i dont think it is the water pump, i did at first, before i had him check it, when it went away i thought nothing else of it. It is however that kind of water pump clattery noise, but quiet a bit louder. if it was coming from my actual engine id scrap the car, put it that way! when it was first done and the engine/ belt got hot it became like a high pitched whine.