What does this valve do

Discussion in 'General Motoring' started by Jfm5, Nov 8, 2020.

  1. Jfm5


    Nov 8, 2020
    Likes Received:
    Hi, could someone please tell me what the valve is for under the black cap it’s on a 1.4 corsa twin port thanks 1E3417C8-4234-4E56-B68D-5BD1810B7FB4.jpeg
    Jfm5, Nov 8, 2020
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