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Thread: What is this part? Check valve?

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  1. #1
    Join Date
    Dec 2006
    Location
    San Jose, CA
    Posts
    113

    Default What is this part? Check valve?

    Not sure what this is. I think it's some kind check valve, PVC? Should it be cleaned? How do I know if it's bad / working properly? I see a vacuum lead here, closed off. Any one know what the vacuum should read at this location so I can check mine against a know good value?

    Thanks

    sc
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    scott 4991
    535i, 172K miles

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