Rattling sound front of engine

[dylan.holbrook]

recently bought a4 2.0 tdi sline 140 and still under warranty. Started getting a rattling sound from engine when idle. At first thought it was coming from the alternator, however if I place myself in front of the grill, the rattling seems to be louder the lower i go. I've no warning lights and car still responds with no problems. Is the water pump situated just below the alternator? and could it be on its way out?

PLEASE HELP!

[Alan02]

Get it to the dealers if still in warranty,could be an Air.Con.Compressor fault...or a number of other things.Let them do the looking.Let us know the verdict.

[Crasher]

Possibly the alternator one way clutch making the tensioner rattle. Does it get worse if you lock the steering over?

[dylan.holbrook]

Get it to the dealers if still in warranty,could be an Air.Con.Compressor fault...or a number of other things.Let them do the looking.Let us know the verdict.

Are you not an Audi Tech? You're right! after you mentioning the possible cause I tested the Air con comp, If I switch in the 'ECO' button the comp is starting to rattle, however switch off the 'ECO' and the noise doesn't exist. Tried this throughout the day and the results are the same. A top diagnosis, many thanks!

[Alan02]

Glad to be of some help Dylan.

[Red Avant]

Nice one Alan02, i had a rattle too and it turns out to be the same- Cheers Buddy!

[Alan02]

OK,thanks,a common problem eh! Hope you all get it sorted soon,and cheaply!! (that`ll be the day!).

[David Ayton]

I have exactly same prob on 55 plate A4 with only 60k miles - minor internal part but whole unit has to be replaced - £850 quoted by franchaised dealer - obviously a common fault so if you are still in warranty get it sorted - I expected more from customer care but . . . .

[CRAIGO111]

I have exactly same prob on 55 plate A4 with only 60k miles - minor internal part but whole unit has to be replaced - £850 quoted by franchaised dealer - obviously a common fault so if you are still in warranty get it sorted - I expected more from customer care but . . . .

Hi David

If you havent got this sorted I sourced a whole unit off e bay from a write off with only 6k miles for £100 and fitted for £50.Just finally had it re gassed at Kwik fit for
£25.