Found the problem with my breather system

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  • rj scotty
    S2Forum Fiend
    • May 2006
    • 2195
    • Home: United Kingdom Current: England

    #1

    Found the problem with my breather system

    So this is why I'm getting so much oil in the boost pipes



    No flame trap fitted either
    sigpic
    "For what you spent on that you could have brought a new car"
    BUT I DON'T WANT A NEW CAR!

    1995 S2 Avant, Volcano Black
    1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
    2003 VW T4 long nose X pack, (has become project)
  • UrS4boy
    S2Forum Obsessed
    • Feb 2006
    • 11859
    • Country: Canada

    #2
    Originally posted by rj scotty
    So this is why I'm getting so much oil in the boost pipes
    No flame trap fitted either
    So we are looking at your PCV system pressure regulating valve. But what exactly are you showing us (besides you cut it open)?

    PCV System Info:

    The Audi Enthusiast website. Forums for all Audis including A4, S4, A5, S5, A6, S6, allroad, A8, S8, TT, R8, Q5, Q7, 4000, 100, 200, v6, v8, vintage, local forums
    RS2'd 93 UrS4 5 spd sedan
    94 UrS4 V8 6 spd manual avant

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    • rj scotty
      S2Forum Fiend
      • May 2006
      • 2195
      • Home: United Kingdom Current: England

      #3
      sorry if pic is unclear; big hole in diaphragm
      sigpic
      "For what you spent on that you could have brought a new car"
      BUT I DON'T WANT A NEW CAR!

      1995 S2 Avant, Volcano Black
      1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
      2003 VW T4 long nose X pack, (has become project)

      Comment

      • UrS4boy
        S2Forum Obsessed
        • Feb 2006
        • 11859
        • Country: Canada

        #4
        Originally posted by rj scotty
        sorry if pic is unclear; big hole in diaphragm
        Can you take and post another photo showing the tear? (If it is nice and clear I will include it in my PCV system post (credit to you)).

        RS2'd 93 UrS4 5 spd sedan
        94 UrS4 V8 6 spd manual avant

        Comment

        • rj scotty
          S2Forum Fiend
          • May 2006
          • 2195
          • Home: United Kingdom Current: England

          #5
          Just for you Dave

          sigpic
          "For what you spent on that you could have brought a new car"
          BUT I DON'T WANT A NEW CAR!

          1995 S2 Avant, Volcano Black
          1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
          2003 VW T4 long nose X pack, (has become project)

          Comment

          • UrS4boy
            S2Forum Obsessed
            • Feb 2006
            • 11859
            • Country: Canada

            #6
            Originally posted by rj scotty
            Just for you Dave
            Perfect. Thanks. Now, did you have to cut it open or just pry it apart?
            RS2'd 93 UrS4 5 spd sedan
            94 UrS4 V8 6 spd manual avant

            Comment

            • UrS4boy
              S2Forum Obsessed
              • Feb 2006
              • 11859
              • Country: Canada

              #7
              RJScotty: I have to think that your Item 20 one-way bleeder valve is not working properly, allowing full boost pressure to hit the diaphram in the pressure regulating valve, ripping it (over time).

              RS2'd 93 UrS4 5 spd sedan
              94 UrS4 V8 6 spd manual avant

              Comment

              • Rusty
                Super Moderator
                • Jun 2004
                • 18953
                • Country: United Kingdom

                #8
                That's not going to cause lots of oil in the inlet... The poor design of the breather system combined with a not so new engine would though... Best off ditching the OE design for something that works

                The PCV valve limits the inlet manifold connection sucking vapour out of the crank case & head. Hence Positive Crankcase Ventilation so it doesn't stop it completely.
                Cheers'en, AndyC
                1994 ABY Coupe - Projekt Alpinweiss

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                • rj scotty
                  S2Forum Fiend
                  • May 2006
                  • 2195
                  • Home: United Kingdom Current: England

                  #9
                  I pryed it apart.
                  One way valve has been removed cleaned and checked for operation and all was found to be well.

                  Rusty, I may need to be speaking with soon regarding this
                  sigpic
                  "For what you spent on that you could have brought a new car"
                  BUT I DON'T WANT A NEW CAR!

                  1995 S2 Avant, Volcano Black
                  1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
                  2003 VW T4 long nose X pack, (has become project)

                  Comment

                  • rj scotty
                    S2Forum Fiend
                    • May 2006
                    • 2195
                    • Home: United Kingdom Current: England

                    #10
                    One more thing guys; can we get away from the term "pcv valve" it very vague as there are 2 valves.

                    pressure regulating valve & check/one way bleeder valve
                    Last edited by rj scotty; 17 November 2013, 22:57.
                    sigpic
                    "For what you spent on that you could have brought a new car"
                    BUT I DON'T WANT A NEW CAR!

                    1995 S2 Avant, Volcano Black
                    1982 VW Golf Mk1, primer yellow, will be finished one day, maybe.
                    2003 VW T4 long nose X pack, (has become project)

                    Comment

                    • UrS4boy
                      S2Forum Obsessed
                      • Feb 2006
                      • 11859
                      • Country: Canada

                      #11
                      Originally posted by rj scotty
                      One more thing guys; can we get away from the term "pcv valve" it very vague as there are 2 valves. Pressure regulating valve & check/one way bleeder valve
                      Exactly
                      RS2'd 93 UrS4 5 spd sedan
                      94 UrS4 V8 6 spd manual avant

                      Comment

                      • fundahl
                        S2Forum Buff
                        • Nov 2013
                        • 44
                        • Country: United States

                        #12
                        What is the conclusion on best method for crankcase ventilation on street cars? Stock system with a well designed catch/oil condensation can before the inlet tube? Haven't talked to 2Bennett about their setup for 20v i5 turbo: http://www.2bennett.com/Audi%20Crankcase%20vent.html

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