gmony123

Hi All, i have some weird situation with my A6.

i have 2001 A6 2.8 that is driving me crazy with oil leakage. i have got the seal replaced a while ago and it stopped leaking and one day i was replacing the plugs and wires and i accidently broke the Breather hose. i did not replace it right away, i waited about couple of months because of scool and work.
As soon i replaced it, the oil started leaking again and could see smoke coming it out from the passenger side. I figured the breather hose caused the oil to leak so i went it in there and unplugged one side of the breather hose. now it does not leak anymore but the "check Engine" light came on and also i also lost some power.

I need help on what causes the oil leak when i plug the breather hose in?

thank you for your time.

eejimm

By breather hose I assume you are talking about one of the PVC hoses? Sounds like a blockage somewhere in the PVC system - hose off, blowby escapes out the hose; hose on blowby builds up pressure and pushes oil out the seals.
Pull codes and I bet you'll see other things as well.
Jim

SloopJohnB@mac.com

It is also possible you just have excessive blowby from worn piston/piston rings such that the PCV system is unable to handle it.

If you cannot find a blockage in the PCV system do a leak down test on the engine...

Redneck Truck

My bet is operator error.

If the CCV system isn't working properly, you might as well replace the suction jet pump, CCV valve, the o-rings and gasket for the valley pan, and go ahead and get the coolant pipe o-rings and knock sensor while you're in there.

ALLDATAdiy INFO

Get ahold of a scanner and let us know what OBD-II codes you pull out of the system.