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Thread: Backbox fitting.

  
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    Big_Up_Vauxhall's Avatar
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    Backbox fitting.

    Getting a decent exhaust this week, with a 4 inch pipe.
    My question is are they easy to fit, do i need to just undo the clamps to the old back box connection(if i can,lol), then remove the old one slide the new box onto the pipe and clamp it again. Sorted.
    Is that all i need to do.

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    T-bone's Avatar
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    Isn't some welding involved??!! :shock: :?: :|
    Me run tings.... not tings run me!

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    I hope not :roll:
    Doesn't the back box just clamp onto the middle section, no welding.
    Or am i wrong. ops:
    Its a 1.4i MK3 astra by the way.

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    re: Backbox fitting.

    no, no welding, as u say, undo the 2 bolts at the joint, slide old BB off backwards (held on with 3 rubbers) Then reverse to put new one back on, prob need new gasket tho, only a quid or so. This is assuming u get one for an astra, not universal jobby.
    I take it ur on about a mk4 anyway :?
    Astra G 1.6 16v SXi

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    LordNikon's Avatar
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    You may have to cut the clamp section off, so the new one can be sleeved over the old setup

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    Basically, yeah, unbolt, put new one on , bolt up again.

    But make sure the replacement has the same diameter pipe for the connection to fit.
    Might also be a good idea to get new clamps, if the old ones are rusted, it's gonna be a problem.

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    re: Backbox fitting.

    lol, poor timing on my behalf there!
    Can't remember wot a mk3 is like, but i'm pretty certain there's no welding involved, either bolted clamp or concentric pipes that slot together.
    Astra G 1.6 16v SXi

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    Yeah its bolted clamped and the pipes slot on, as you say i may need to cut one pipe to get the other off. But the pipes seem pretty new, they are still silver, and so hopefully it may slide straight off.
    I have a new clamp to go on, and the backbox is to a MK3 astra.
    Will i need a new gasket, is there one?
    My mk3,117K, and the engine is still going strong
    shame about the car shell tho,lol.

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    if ur getting a center section as well watch the bolts that attach it to the cat, they'll b v rusty an snap 9 times out of 10!

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    Quote Originally Posted by Local_boy
    if ur getting a center section as well watch the bolts that attach it to the cat, they'll b v rusty an snap 9 times out of 10!
    No i ain't, just the back box.
    Where is this gasket, is there one??

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