on my 01 wagon, bought new have 105k, the car has always been run easy. in the last year, just when its in gear,with a little stress on the engine. like if you are in neutral, and pull into drive, there is a rattle, the idler pulley and alt, and belt tension are all new. also if i accelerate real fast it will rattle a little. i think it might be the timing, belt area'. i have never had it open. is there a belt tension ,that could be bad?? i have a new 14 focus, so the wagon is on light duty. any ideas on this noise, thanks any pictures of this area??????