hi iv taken my top chain cover of to see if there is any sighns off wear as when i bout the car i was told the chain and guides was done it all looks good i put new tensioner on it every thing looks good any i dears what would make the rattle nosie its bad as the car gets warm first thing on a morning for about 2mins its ok then rattles like a cam chain iv read that they do make a rattle noise any way but how true is this the car runs a1 with power any idears ???