1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

oil bubbling in sump!!!wtf

seany26 May 21, 2013

  1. seany26

    seany26 Member

    Ok here is one to pick everyone's brain, just done a pressure test from my TIP(with breather blocked off) to test for boost leaks and split vac pipes and only thing that I could hear is oil bubbling in the sump. Immediately I thought that the head had blown between a cylinder and oil port but as I write this I'm thinking it is most likely coming from the oil return pipe in the turbo ie through the turbo seals! Might be a no brainer but like to know what every one else thinks anyway. Don't see really how air could get back down through the block and bubble in the oil with non-return valves in place.

    Thanks, any comments welcome.
  2. Mike.M

    Mike.M Well-Known Member

    Is it a 1.8T?

    If so I think the oil pick up could be blocked
  3. @udi A3

    @udi A3 Site Sponsor Site Sponsor VCDS Map User

    How much pressure was used? When I was investigating boost leaks it was advised any more than 5psi could damage seals. Smoke testing draws a 1psi vaccuum iirc. If you think you have a leak would recomend smoke testing, as it picked up my leaks immediatly.

Share This Page