Sorry to jump on your thread but I'm also having a similar problrm. I've been loosing alot of oil, I'm suspecting it is the oil breather that is leaking. No visible leaks on the floor but using alot of oil, I recently cleaned the crankcase breather out aswell I used brake cleaner and petrol!
I haven't noticed any smoke just using alot of oil, I need to order a hose to replace the bottom section of the breather hose before the heater because it gone soft.
I've been wondering if the newer style crankcase breather would fit.
I currently have this style fitted...
http://www.ebay.co.uk/itm/161977485392
It has a small inline heater in the middle of the breather hose and I have re routed the end of the breather to the 90' silicone hose so it doesn't pass through the cda air filter.
Im wondering If this would fit and if it would be better than the older design....
http://www.ebay.co.uk/itm/191917581428
Also there seems to be 2 different versions ....
036103464AD
036103464AC
Is the sensor on top of this style of crankcase breather also the crankcase heater? Can I ditch the inline one?
The one I have fitted at the moment is like...
http://www.ebay.co.uk/itm/112042227602
Except the element inside is black.
Sorry for all the questions I've been trying to get to the bottom of this the last few weeks. It's in a 2000 6n2 gti 1.6 16v arc.