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Thread: Boost/vacuum hoses

  
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    onlytuesdays's Avatar
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    Boost/vacuum hoses

    hi i was hoping someone could point out where all the boost hoses and vacuum hoses are in the engine if i wanted to check for leaks, Z20LEH or LET as they both similar, im a little baffled?!? lol thanks in advance.......

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    brc's Avatar
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    vaccum hoses are easy to find mate ! under the car near the sump (LET) two tubes. Vaccum is the one on the left

    zuzuzuzuzu.

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    ok thanks so they are known as the vacuum hoses, im trying to associate which hoses are which, how about the boost hoses?

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    the vaccum hoses all get their vaccum from the throttle body, if you look on the left hand side of it you'll see a little 3mm hose coming off it, that then goes to the FPR, OE dump valve, vacuum box and rear BCS. if you think you've got a leak and cant find it you might wanna bypass the vac box and rear BCS, alot of ppl do it inc myself do search for "bypass rear bcs"
    boost hoses are your air intake mate, after the turbo but obviously vacuum lines are also under boost pressure when accelerating due to the throttle butterfly being open
    !Astra Coupe Turbo!
    243bhp and 334ft/lbs!

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    thanks for clearing this up for me, when u say bypass rear BCS or vac box can this be done on the LEH?

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