Hey guys,

Just checked my car (Fabia 2015, 1.2 TSI manual gear) for maintenance purposes and saw this "sweating" on the hose connecting to the intercooler (?)

Checked the dipstick - oil is almost at max level.

Anyone had this and can point towards a fix? I do own some tools and motivation to diy this if possible ;)

Edited 2 May, 20251 yr by Chilimong

I think that that is as good as it gets with some of these 1.2TSI 16V engines, my wife's 2015 Polo was clean down there - that is the throttle body - or throttle valve, and it is the oil mist in the turbo output that is weeping out at that point, until I removed that pipe to replace the spark plugs at the 4 years service point in its life, since then, that area has remained damp with oil. Edit:- I did fit a new O-ring washer!

My thoughts are, as road salt chunks can end up being thrown into that area, you can get corrosion forming on the aluminium top of the throttle body, and usually that corrosion can track down over the face of where the sealing O-ring is located, so game over from then on. I've scrubbed that area once to try to stop that oil mist weeping out at that area, but it still escapes.

On that 2015 Polo, there is not much in the way of engine oil reaching that area, when you take that plastic charge pipe off, you should only ever see a few drops of oil dripping out - any more than that and there is a problem somewhere.

Looking back, maybe I did not need to remove that charge pipe to get the coil of maybe cylinder 4, and if so, maybe oil would never have started leaking from there - very annoying!

Edited 2 May, 20251 yr by rum4mo
Added "I did fit a new O-ring washer"

I've just had a look under the bonnet of my wife's 2015 VW Polo 1.2TSI 110PS and it has stayed a lot "drier" than your car - in that area, I did not remove that charge pipe when I replaced the spark plugs 2 years ago, so maybe this weeping has slowed down since I last replaced these O-ring seals back in 2019!.

There is an O-ring sealing washer at both ends of that charge pipe, and the official instruction in the workshop manual is renew them after removing the charge pipe.

The VW Group P/Ns are WHT 001 386 and WHT 003 247

Not-so-good news I'm afraid, I have just had a look at my wife's 2015 1.2 TSI (90) and it is as dry as a bone down there from what I can see and enough dust in the engine bay of my wife's car to easily show. Plugs have been changed twice (by Dealerships).

Expensive poor quality VWŠkoda front dampers certainly oil mist (from at least 11 months old if not sooner or at first use).