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Thread: Boost leak from OE DV

  
  1. #1
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    Minty's Avatar
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    Boost leak from OE DV

    Hi All,

    After reading on here that its best to have the OE DV and the AM DV connected i thought i would connect up the OE one. I bought the car with the setup where there is a AM DV and a vacume line with a screw in the end of it connected to the OE DV.

    I took that vacume pipe off the OE DV and added a T Piece to the FPR and connected a new pipe to the OE DV.

    Now i have both connected i seem to hear a whistling sound from the Turbo when accelerating slightly at 70. Is the OE DV staying open at certain revs and leaking boost?what can i do to correct this?

    Also the AM DV is connected to the rear BCS.

    Hope all this makes sense, any help would be appreciated.

    Cheers

    Minty

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    gsi-jay's Avatar
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    need to check if the diafram and spring is still in the oe re cerc / dumpvalve simpley by sucking on the pipe that goes to it and you should hear the diafram moving and closing
    courtney stage 3 zafira,Mitsubishi evo geek mapped to 389 and 470 lb of torque

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    I'd disconnect your aftermarket one from the rear BCS and connect it to the FPR, that will be the cause of the whistling sound.

    If you want to run both, then connect them both to the FPR.
    Black Astra Coupe Turbo

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    So what happens to the outlet coming from the BCS? would that not leak boost or would i just have to block it up??

    It seems to be the OE DV thats leaking boost rather than the AF DV.

  5. #5
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    Many people on here have disconnected the rear BCS, including me.

    It will not leak at all with it disconnected. Try using a "T" piece to run both dump valves off the FPR, which should sort your problem.

    If you are really convinced its' the OE dump valve then take it off and have a look. If it is split then put a spacer in it to stop it operating - make sure you connect the aftermarket one up though.
    Black Astra Coupe Turbo

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