2.0 TDI "judder" at idle

[Rob P]

My 2006 Leon 2.0TDI had a slight "wobble" when it was revved gently and held at around 1500rpm, very slight and definately on/off but you could feel it through the cabin. The revs would remain constant but you could feel something there.

Then I borrowed a 2004 A4 2.0TDI and it has the same characteristic - this time at normal idle.

Then I get my car back from a cambelt change and now mine does it at idle.

Anyone know what I am talking about? Am I going mad?

[Rav]

My 2.0 TDI VW Touran does this too.
Its very slight but definatly there.

Could it be engine mounts?

[Neil_Sc]

This judder is very common on 1.9 TDi Audi A4's.

Mine does it terribly, it is interesting you note the cambelt change, because when they do this to the 1.9 TDi, they have to go through a routine to reset the timing, or indeed they should.

Another thought was that it could be something to do with the fuel injector, although I have never really started replacing parts as the car is totally fine when driving normally, it is only at idle.

One thing I did note on mine is that turning on the climate control substantially reduces the juddering at idle.

[sleep envy]

can you feel the engine firing through the clutch pedal?

[Rob P]

Yes you can feel it through the clutch, probably because most parts of the cabin pick it up too.

Suppose it could be the engine mounts but the inbalance must be from the internals of the engine - hence mine got worse after a cambelt change.

[brisel]

I should check with your dealer that your engine isn't part of the mass recall for a dodgy batch of dual mass flywheels.

My wife's 2003 A3 TDI was called in for the change & I remeber that many VAG engines were affected. Some caught fire too...

[Rob P]

brisel said:

I should check with your dealer that your engine isn't part of the mass recall for a dodgy batch of dual mass flywheels.

My wife's 2003 A3 TDI was called in for the change & I remeber that many VAG engines were affected. Some caught fire too...

Will give them a bell then!

[philip walker]

Who ever did your cam belt should check the valve timing using the correct pins and clamp.

Some garages use a blob of paint as markers, this will cause problems when the new belt is tensioned.

[DPX]

www.tdiclub.com may hold the clue , some nice info in forums