i have a 2001 vectra 2.2 sri. i had both chain kits replaced last november and ive done around 10k since. when i start the car hot or cold i get a rattle more when cold. i have been told that its the tensioner and told of someone else that it could be sticking. when the cars warmed up its lovely and quite. the tensioner i got with kit has the rounded top is this the right 1? anyone has any ideas id be greatfull as its driving me mad!!!!!