Why does my Audi 80's engine make a ticking sound at idle?

I've noticed a ticking sound coming from my Audi 80's engine when it's at idle. What could be causing this and how can I fix it?

It's possible that the ticking sound is coming from a faulty valve lifter. This is a common issue with Audi 80's and can be fixed by replacing the lifter. It's recommended to have a mechanic inspect and make the necessary repairs.

Another potential cause of the ticking sound could be low oil pressure. Make sure to check your oil levels and consider getting an oil change if needed. If the problem persists, it's best to have a professional look into it.

If the ticking sound only occurs when the engine is cold, it could be due to a worn timing chain tensioner. This part is relatively easy to replace and should solve the issue. However, it's always recommended to have a mechanic perform the replacement for proper installation.