Hi all,new to the site and was hoping for some advice on some problems i am having with my Astra. 2005 1.4 Astra club. On starting the car from cold there is a loud rattle from left side of engine as you are looking at it that disappears after a few seconds running. Once this rattle has gone you can hear a lower "rattle" from same side of engine but lower down possibly that you could liken to a dry bearing maybe.This noise matches speed with engine revs. Car runs fine and drives perfectly otherwise,just very annoying having to hear it at every start up. Any help would be greatly appreciated.