Hi, this is my first post.

I have a 106 gti that the engine rattles from time to time, normally
after the car has warmed up - it is a whining rattle that comes from
the timing belt area/16v box.  Possibly, but not definitely air
escaping.  The car is running fine, I had the timing belt changed about
10k miles ago.

I have had a mechanic take the cover off the belt and have a look - he
says everything is fine in there.  What else could be making this
noise?

Any replies much appreciated - I am worried about my cam belt going
then the engine going BANG, don't have the cash for a rebuild want to
get it sorted ASAP.

Thanks, ben.