Just back in first GTi since my Mk 2 8v of many years ago, now driving 2006 MK 5 GTi DSG and loving it.
Only had this car a month, didn't notice on test drive but ticking at idle became increasingly apparent and began to bug me. It goes away with any revs & runs very sweetly otherwise. I've had the same engine in previous cars & never noticed it.
I sought several opinions to put my mind at ease (I have been known to obsess over small things...) :
1) Local garage - didn't know, wanted to replace cambelt & tensioners
2) VW Main dealer 1 - just stuck head under bonnet to be fair, it wasn't booked in, not a proper check over - "just a noisy engine".
3) Garage linked to dealer I bought it from - "it's the injectors, it is just a noisy engine" - no issue.
4) VAGtech - again, some of these engines can be noisy, plugged it in for check, recommend check TSB (Technical Service Bulletins) with VW particularly around manifolds.
5) Booked it into VW main dealer no 2 for proper diagnostic (£78) - no issue, some of the engines can be noisy, nothing found.
So, after all that, I'm comfortable there are no issues & nothing to be done or that can be done. I will try 98 Ron to see if it makes a difference plus keep a close eye/ear on it & make sure it is topped up with the right oil. Otherwise I move on.
I thought it was just me, my last car was vastly different and pretty much silent.
Cheers