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Crankcase Ventilation Flow Diagram

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  • #61
    Originally posted by UrS4boy View Post
    "4A" is No. 3 in my diagram, the pressure regulating valve.
    I was refering to the Etka 3B diagram. His car is a 3B.

    S2 Coupe 3B Project


    Ur quattro restoration

    S2 Avant

    Boost is the new rock and roll!
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    • #62
      Originally posted by newsh View Post
      I was refering to the Etka 3B diagram. His car is a 3B.
      I know. "4A" in the ETKA 3B diagram is "3" in the ABY diagram = pressure regulating valve. Item 6 is the bleeder valve (aka "PCV" valve)

      http://forums.quattroworld.com/s4s6/msgs/22506.phtml

      Last edited by UrS4boy; 15 February 2012, 23:56.
      RS2'd 93 UrS4 5 spd sedan
      94 UrS4 V8 6 spd manual avant

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      • #63
        I have cut 2A part (iron tube) to match the part 2 of the upper circuit and move 4A at place of 4 in the same way
        The only thing missing that i cannot connect as OEM right now is the #13 to the cover camshaft, this same one taht you cannot see in the upper schema ...
        That's why I asking : Any risk to close this ?
        91' S2 3B Pearl White

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        • #64
          This risk is that pressure in the cam cover will cause the cam cover gasket to leak oil. This can leak wher you can see it or into the spark plug holes.
          As you no longer have part 1A, ideally you need to T the cam breather into the new pipe down near the crankcase vent.

          http://www.ebay.co.uk/sch/i.html?_fr...All-Categories

          S2 Coupe 3B Project


          Ur quattro restoration

          S2 Avant

          Boost is the new rock and roll!
          sigpic

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          • #65
            Many thanks for you help guys, I will try to find a T that can match
            91' S2 3B Pearl White

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            • #66
              Sorry to bump an old thread, but it's all good info

              Went out today to battle with my steering damper bolt one final time ahead of its MOT and noticed that there was a loose hose at the bottom of the engine bay leaking oil :\ It seems the T-piece for the breather system that sits right at the back of the head has literally disintegrated.... and upon closer inspection numerous joins and hoses in the PCV system look to have been crudely bodged. As I await new hoses, can someone confirm my suspicions that the pressure regulating valve on my engine was fitted the WRONG way? This is from the top of the engine, thanks:

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