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Thread: y30dt tapping

  1. #1
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    Vehicle : vectra v6 cdti

    Trim : sri


    Year : 2005

    Mileage : 70000

    Default y30dt tapping

    Hi again
    Engine seems more tappy than normal the last few days,dosnt dissapear when warm plus while listening with bonnet up i took oil filler cap off and there was a light whisp of smoke coming out is this normal,could the tapping noise be an injector problem,how quiet is your v6 diesel on tickover,i think it was M8INTERNET said his was almost silent on tickover,mines never been that quiet.

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    Regular Member Critch's Avatar
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    Vehicle : vauxhall vivaro

    Trim : Basic

    Engine : 1.9

    Year : 2004

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    Can you video it?

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    Vehicle : vectra v6 cdti

    Trim : sri


    Year : 2005

    Mileage : 70000

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    Would not have a clue how to get a video on here,im crap with owt like that, hav,nt even got aux cable from phone to laptop could get a cable but then what lol.

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    Regular Member m8internet's Avatar
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    With the engine cold and bonnet down it just sounds like a noisey petrol V6
    With the engine cold and bonnet up the diesel sound can be heard

    With the engine warm and bonnet down the engine is almost silent
    With the engine warm and bonnet up the engine just sounds like a noisey petrol V6

    It's not until you apply some revs, to about 2000rpm, that it is clearly a diesel V6

    Smoke when you open the oil filler is quite normal, after all it is supposed to remain closed
    However, if smoke continues to be produced then there may be an issue requiring attention
    What is the oil level and pressure like?
    What oil has been used?
    How old is the oil and oil filter?
    What diesel are you using?
    How old is the fuel filter?

    Has the cambelt been changed?
    If so, were the valve clearance checked?
    What are the idle revs like?

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    Vehicle : vectra v6 cdti

    Trim : sri


    Year : 2005

    Mileage : 70000

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    Mine sounds no different hot or cold,sounds very metallic at about 1300 revs as though there is no oil in top of engine.
    Fuel filter is new
    Not sure about oil as its not been changed by me but by vauxhall 3500 miles ago last owner
    Diesel is ordinary supermarket diesel
    Idles at around 700rpm but tapping noise
    Cambelt not been changed since new on 69000 miles now
    Also everytime i get out of car i can smell exhaust fumes,did not notice this on the 1.9s i had is it because i have an exhaust on my side.
    When driving above say 1800 rpm it gets more and more smooth as the revs increase,but im positive it was more silent at low revs when i first bought it
    If i had an injector problem even slightly blocked would this impair performance,because it still feels just as quick as it first did.

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    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    Mine is louder when warmed up but nothing too dramatic. I think it's just the tappets in my case? Either way it doesn't have a metallick tick when I rev it. In comparison to some other V6CDTi's mine might be a bit louder because I removed the undertray 3 years ago

    https://www.youtube.com/watch?v=L0iu9E7AfZI

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    Vehicle : vectra v6 cdti

    Trim : sri


    Year : 2005

    Mileage : 70000

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    Watched the vid celes im sure it sounds smoother than mine when its revved,but at around the 37 second mark he holds it at 1100rpm and it has that same metallic wobbling noise,noreec as also got another video on youtube titled signum v6 cdti injector problem which my car sounds abit like that but not quite as bad.

  8. #8
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    That's my Signum mate the noise is normal at 0:37, it sounds smooth in real life and the engine does't wobble or anything like that.
    The other one you're reffering to is my older V6. At first it started out as ticking under load which disappeared once the revs built up. Power wise it was fine until it started spluttering under steady throttle. The end result was this https://www.youtube.com/watch?v=NRvzAcaK6pA

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    Vehicle : vectra v6 cdti

    Trim : sri


    Year : 2005

    Mileage : 70000

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    Hi celes how many injectors where bad on your signum,thanks for uploading the video.

  10. #10
    Regular Member Celes's Avatar
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    Vehicle : Opel Signum

    Trim : Sport

    Engine : 3.0 CDTI

    Year : 12/03

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    I don't know, but I replaced all 6. I suspect there were at least 2 if not 3 that weren't workin properly. After I replaced them the car ran like a dream with hardly any smoke

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