Why is my Audi 80's engine making a strange rattling noise?

After starting my Audi 80, I noticed a rattling noise coming from the engine. It seems to go away after driving for a while, but returns when I stop and start the engine again. What could be causing this and how can I fix it?

It's possible that the noise could be coming from a loose heat shield or exhaust component. I would recommend having a mechanic take a closer look at the exhaust system to see if any parts need to be tightened or replaced.

Another potential cause could be a worn out or faulty timing belt tensioner. This could lead to the rattling noise you described. I would suggest having the timing belt and tensioner inspected and replaced if necessary.

I once had a similar issue with my Audi 80 and it turned out to be a problem with the air conditioning compressor. It was causing the rattling noise and needed to be replaced. I would recommend getting the AC system checked by a mechanic.