Oil residue on turbo face and/or output charge air pipe ...

[gupsterg]

Hi peeps! ...

Since owning my car now from Aug 11 I've always noticed oil residue on the face of the turbo body air inlet side and on the output charge air pipe...

I had it wiped away when the engine was removed in July 12 ... but it returned ...



Due to these 2 threads...

Link:- 3.0 tdi hunting overrun

Link:- Please Help V6 TDI oil leak left side of turbo - HELP

I thought I would too clean areas/inspect and replace the seal between the connecting piece ( Pulsation damper ) and turbo ...

Due to above linked threads my own investigations revealed that the facelift V6 (09-11) has a clamp on the pipe from the crankcase ventilation system ...

So parts used:-

4F0 129 193 Seal approx. £5 inc VAT

N 911 061 01 Spring band clamp (30x12) approx. £4 inc VAT, alternative is N 910 543 01 Adjustable clamp 20-32x12x0.5 approx. £3 inc VAT (got from a A8 diagram)

I brought 2x screws just in case I lost the other ones N 909 589 02 approx. 30p each.

The seal is also shown in these links:-

Item 20 from this diagram Link:- Audi Workshop Manuals - A4 Mk3 - Turbocharger - exploded view

Item 5A from this diagram Link:- Exhaust gas turbocharger 3,0l. Fits: Audi | Jim Ellis Audi Parts

Item 11B from this diagram Link:- Air cleaner with connecting parts mass air flow sensor 2,7/3,0ltr. 2.8/3.2ltr. 2.8ltr. 3.2ltr. 4.2ltr.. Fits: Audi | Jim Ellis Audi Parts

Clamp on hose item 1A in this diagram Link:- Ventilation for cylinder block 2,7/3,0ltr. 3,0l. Fits: Audi | Jim Ellis Audi Parts

*** Viewers be aware that these diagrams, etc are generic they are being linked for illustrative purposes, please confirm P/N, etc with local dealer ***

Removed hose from air mass meter to turbo, then the smaller hose off the connecting piece / pulsation damper ...



Old seal...



Smears of oil but no more than a teaspoon or so of oil came out from connecting piece / pulsation damper , mine had a p/n of 059 129 955 A (latest is 059 129 955 C )... the mesh is made of plastic on part ...







IMO I don't think the seal was leaking as bad as I thought against the turbo body face ...



But I know the area on the charge air pipe had been cleaned in July 12 and in between then and now ... I'm hope the clamp will stop this residue trickle down to turbo air outlet and on base of pulsation damper ...



On removal of old seal some oil sat in between it and housing...



God knows what the pulsation damper dampens as the crankcase ventilation pipe connection is straight through...



Turbo face and charge air pipe cleaned with just a cloth...





New seal was simply pushed into housing... connecting piece / pulsation damper cleaned with cloth...





Clamp fitted on crankcase ventilation pipe to connecting piece / pulsation damper ...



Only issue I had with removal/refit was I dropped a torx bit into engine bay when doing lower bolt on damper ...

I jacked up car removed undertray, it was no where to be found ... from the noise I think it rolled down to bottom of car and into subframe luckily no rattle noises from it perhaps it will roll out of it's own accord...

Whilst tray was removed I inspected the flexible hose going to first intercooler from below and the backs of both intercoolers for any signs of splits/leaks...

Thankfully all was well ...

To me all of above formation of oil residue looks normal due to how the air from crankcase ventilation system has some oil vapour in it plus the oil residue on charge air pipe would be less IMO if a clamp was in place on pipe like the 09-11 V6 has...

If anyone can give any thoughts on all of above would be great ...

[apole]

HI Gup,

Had a few VAG group TD cars, up to 130PD TDI. They all suffered somewhat from oily gunk in turbo pipework and intercooler. I did clean this all out in one of my cars and to be fair didn't notice any difference.

Looking at the various posts on inlet manifold cocking on the FSI petrol engines, one guy has a theory that engine oil has ingredients that vapourise and cause some clogging, and that changing the oil too often can be detrimental in this regard as these burn off the new oil so changing it often increases this burn off and the gung that results.

Not sure about that but all I can say is from what I've experienced in the past on several cars, oily residue is normal and unless it gets too great doesn't seem to have any detrimental effect.Regarding the clamp, is it more likely there to prevent the pipework coming off or leaking over time?

Do you think fitting an oil catch can of some sort would help?

[gupsterg]

Hi Andy,

Thanks for viewing/comments ... the seal/clean up has had no noticeable effect on car bad/good but the clamping of the hose means no oil residue appearing on that section of damper and trickling down onto base of it or charge air pipe ...

IIRC someone has fitted a filtering device on the connecting hose from crankcase ventilation system... I'll be asking them for info ...

[jubbly]

Looks good Gup, think i will order the clamp and put one on mine to.

[gupsterg]

It has been a month since doing the mod with the clamp and I can report no return of residue after placing clamp on hose from crankcase breather to pulsation damper ...

So before mod ...



TBH the area look exactly like after cleaning/applying mod ...



The oil residue on the hose connection/lower body of pulsation damper has not returned either ... the face of the turbo body is also clean ...

[MarkTM]

IIRC someone has fitted a filtering device on the connecting hose from crankcase ventilation system... I'll be asking them for info ...

Did you get a response on that question and what it was for/where they got it and the part no/benefit?

[gupsterg]

Been so postoholic () that completely forgot () will contact source ...

[gupsterg]

OMG! ...

Today I was nosing some info for some geaky reason and I came across a TSB / TPI for the exact same remedy I did on my car ...
And in the TSB / TPI they used the same spring clamp I decided to out of the parts cat as it was appropriate size and cheap option ...

The title of TSB / TPI is 'Oil leaks on pulsation damper/crankcase ventilation - A6, Q7 V6 TDI' ...

Best of all the position of the clamp that I did in post 1 is the same advised in the TSB / TPI ...

And Mark due to other meddling owner engagements () I have not chased info about the oil catch can that someone fitted but will ask again ...

But best of all solution still working for me ...

[badchi]

Hi Gupsterg,

Nice post and pictures.

I have not noticed anything wrong with my Audi A6 (2006) but I have the same problem as shown in your 1st picture with Oil Vapour /residue on right side of the pipe / hose. I wipe it and it comes back when I check few weeks later.

Do you think tightening the 2 Screws on the clips as shown in your 1st picture will help?

I have just tighten mine but now worried if that could make it worst?

Thanks

Badchi

[gupsterg]

I guess with aging of the connecting hose piece they'd need a little nipping up. Service manual highlight 5.5nm for those clips, which is very low torque, so don't go overboard.

I know another owner replaced his and IIRC wasn't that expensive but a bit of a fiddle to swap over due to location. He had to unbolt/loosen the lower metal hose's mounting clamp to the engine to get the connecting piece on it and turbo IIRC.