im in need of help im buying my first car soon im looking at a 2005 impreza but somethings are off one big thing is that it knocks for 2 seconds when starting he motor im not experienced in Subarus and that why i need help form someone that does. is this a major problem or something that can be fix? [/B]

 

I'm no professional mechanic, but just hope that it isn't a Ringland failure causing the knock.