Rattleing noise on tickover 2.0TDi

**adam6900** · 03-01-2010,08:13 PM

got a strange rattle coming from round the aircon/ tensioner/altenator area on my B7 Tdi 2.0 is it a commen thing? goes when you rev it,

Would love to know what it should be before striping it down

**irishejit** · 03-01-2010,11:09 PM

mine does the exact same thing,tried changing the tensioner which didnt work so left it in for a diag.it ends up its the air-con pump and its also a common
fault.audi will charge around the £800 mark to change it but you can take
a gamble and by a 2nd hand one for around £100 from a breaker but there
is no telling how long it will last.there was one scare story with someone (on here I think) paying the audi price only for it to fail two years later.
ATM I am just ignoring the noise and im going for the cheaper fix

hope this helps

**adam6900** · 03-01-2010,11:11 PM

Ah thats not to bad then, must be the clutch unit on the pump, sprayed loads fo wd40 over everything near the noise and it stoped for a few min, time for a strip down

**a8 tech** · 03-01-2010,11:30 PM

you can fit a new pulley kit for the a/c compressor

**adam6900** · 03-01-2010,11:33 PM

Am i right in thinking its going to be the bearing that supports the outer part of the pully that goes?

**a8 tech** · 03-01-2010,11:39 PM

The pulley has 6rubber elements inside it and they breakaway so replace the pulley and also fit the self-adhesive noise-damping foil part number 8E0 260 329.

**adam6900** · 03-01-2010,11:41 PM

Chears mate, ill phone audi for the scary price tomorow! done one on a 04 golf a few years ago so it cant be that hard

**a8 tech** · 03-01-2010,11:46 PM

If you need the info how to remove and fit pm me.I normally degas the system and remove the compressor but you can drop it down and do it that way.This repair is for the denso type compressor so ask the parts to double check for you or look at the compressor and you will see the denso id on the pulley face

**peter 135** · 04-01-2010,11:33 PM

I have the same rattling noise on my '06 2.0 tdi (blb engine)on start up,noise dissappears when engine warms up or if a/c is switched on.My question is why would the noise go away when engine warms up.Very hard to locate exact source of the noise.Any tips.
Many thanks
Peter 135

malc11f · 04-01-2010,11:48 PM

I had a similar problem on my 2.0TDi. It was under warranty (from a warranty company) which was fortunate as it turned out to be a faulty tensioner on the oil pump chain. Not a cheap job. It cost nearly £600 but this did include the replacement of the the timing belt and the pulleys (the warranty company didn't pay for these though).