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Thread: 1.8 vvti grumbling sound

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    Regular Member videodoctor's Avatar
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    Default 1.8 vvti grumbling sound

    I have a 07 facelift 1.8 vvti exclusiv Vectra and for a while now it grumbles on heavy acceleration.

    If i come to a junction where i don't have to stop and change down into 2nd to carry on the car seems to make a grumbling sound until the revs are higher.
    It sounds to me like either the exhaust is blowing slightly or could it be if the garage haven't used the correct grade of oil?.
    The car in general runs fine with full acceleration but this grumble has just started in the past few thousand miles.The car only has 13,000 on the clock.
    Does anyone elses 1.8 vvi make this sound?
    Thanks alot for any help.

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    Regular Member 67688c's Avatar
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    Quote Originally Posted by videodoctor View Post
    I have a 07 facelift 1.8 vvti exclusiv Vectra and for a while now it grumbles on heavy acceleration.

    If i come to a junction where i don't have to stop and change down into 2nd to carry on the car seems to make a grumbling sound until the revs are higher.
    It sounds to me like either the exhaust is blowing slightly or could it be if the garage haven't used the correct grade of oil?.
    The car in general runs fine with full acceleration but this grumble has just started in the past few thousand miles.The car only has 13,000 on the clock.
    Does anyone elses 1.8 vvi make this sound?
    Thanks alot for any help.

    Have had similar noises from my 1.8vvt Insignia.

    I think what your hearing is resonance noises coming back through the bulkhead. Check under the bonnet for anything that may be causing a vibration noise at certain rpm. On the Insignia 1.8 models the airbox has been causing lots of resonance issues for people, quite loud too around the 2k-3k rpm mark. A couple of small pieces of foam placed under the airbox seems to fix it on the Insignia, in fact its now a VX field remedy fix..lol

    It will likely be something silly and simple to fix, but the noise can be very annoying. AIS check that airbox area first, mine is rubber mounted as your will be, but it still made a noise at certain rpm, a bit of foam underneath solved it.
    Wierd noises can often be awkward to locate, and in your case it could be many things, from something under the engine vibrating or resonating to even the exhaust which may be catching the body due to a broken/bad exhaust mount. Hope you sort it.

    Alternatively as a last resort, a visit to the dealer may be justified, and get them to sort it out under the warranty.
    Last edited by 67688c; 2nd August 2009 at 11:33.

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    Regular Member videodoctor's Avatar
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    Thanks for the reply Cameron43.I hadn't thought of things vibrating so i'll have a look this afternoon.
    Cheers for replying so fast

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