I would say YES

 

from factory they havnt got a clip , there is a rubber o ring in there but the pipes tend to stretch a bit over time causing a loose fit . jubilie clip and jobs a good en T:

 

from factory they havnt got a clip , there is a rubber o ring in there but over time becomes a loose fit T:

it should also be have a bolt holding it in place where the dipstick is

 

Mine has a rubber coller about 3" long jubilee clip on both ends which conects the air intake to the turbo

 

There is no clip as it's a hard plastic tube, some have put jubilee clips around the pipe but I can't see that doing very much as the pipe isn't flexible.
On mine I removed the O-ring from the turbo pipe, put a few wraps of plumbers PTFE tape in the groove for the O-ring (to push it out more) then refitted and tested for tightness.
I've since got a generic pack of O-rings so if I'm ever back in there again I'll change it for a fresh O-ring.

If you could fab up a rubber sleeve for the pipe to go over it that would be the best solution I think. Even using a short section of an old inner tube might be all that's needed. That point is under slight vacuum when running so it should pull itself tight when in use.

 

Ok, thanks gents, i like the inner tube theory Dick, will have a look into that.

Cheers, T:

 

On mine i used a rubber sealing ring from a sink waste trap, they are wedge shaped andv seems to have done the job.When the pipe is loose it is drawing in unmetered air.

 

Yes, thats what i figured, got to have a effect on the maf, wil it actually make any difference though? :*

 

The plastic air inlet pipe seems to be affected by heat or by oil mist drawn through the breather system - the effect is that it 'grows' and fails to be a tight fit on the turbo inlet spigot. As others have said this leads to unfiltered and unmetered air being drawn in, with a corresponding reduction in air pasing thorough the MAF sensor. On my van (2.5 TDi AJT) replacing the pipe and O ring with a new one (about £18 from dealer) made a noticeable difference to the running of the van - more power, smoother, more responsive etc.

About a year later I had reason to take the pipe off again, and found that the new pipe had also started to expand. I refitted it with a new O ring and a big jubilee clip - no problems since.

Clearly this is a design fault which should have been rectified by VW, but as it's not that obvious to diagnose maybe they just decided to keep quiet about it.

 

Can anyone tell me if the pipe tht goes from the airbox to the turbo should have some sort of clip on the turbo end?

Mine doesnt and the pipe seems a loose fit on the turbo.

2003 2.5 tdi 88/

any pics on which pipe you mean

 

Follow the air ducting from the filter box. Where it meets the turbo body at the back of the engine that's the joint we're talking about.

 

Obviously a common problem that was unknown to me...

Doesnt look like its going to come off very easy though?