Hi all!!
I am new to the forum as only just got my MK5 (had 3 golfs previously) and had a bit of a mare with my recent purchase as you will read........
I have a 55 plate GTI, graphite blue, DSG, leather, 18'' monzas. I believe it was the one previously owned by Spencer30 - based on the fact it had the same noise as he posted on this original thread, and his name was Spencer, lol!!!! Like Holepunch and Gene Hunt mine was fine when cold but as soon as up to running temp, sounded awful (just like a diesel) - however, performance was not affected.
Needless to say, when I took the car out to buy, it was cold so didn't notice the noise so much. He did say that he had been to VW dealership but they, like others, said there was nothing wrong with it - how wrong they are!!!!
Bought the car at the end of May and took it to my local dealership early June - they had it for a couple of weeks (gave them all the literature from this thread to help as they too were stumped). They changed the cambelt and waterpump on my request as thought it may be this, this did not solve it, at least it is done tho!!!!
After numerous tests - oil pressure, fuel pressure etc, they finally gave in and took advice and a visit from technicians from VW UK (Milton Keynes) - they were absolutely determined to fix the problem.
The result was the timing chain - exactly the same as Holepunches. Got it back yesterday and sounds just like it should. Only problem now is I am very skint, lol!!!
Gene Hunt - if yours is the same problem as mine was I hope you have a warranty as it cost £1200.......(this included cambelt and waterpump too).
Loving the car even more, it is awesome!!!!!!
Hope this helps.