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Thread: Changing fuel filter on 3.0 V6

  1. #1
    Regular Member BigWilko's Avatar
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    Vehicle : Signum

    Trim : Design

    Engine : 3.0 CDTI

    Year : 2005

    Default Changing fuel filter on 3.0 V6

    What do i need to know before i start to change the fuel filter on my 04 3.0 V6 CDTI? Any tips?

  2. #2
    Regular Member m8internet's Avatar
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    How long has your fuel filter been in use?

    Use correct tools, have replacement part ready
    There is also a gasket, so worth buying that just in case

    On fitting the new filter you are supposed to immerse it in diesel and/or topup
    If this is not possible, then once fitted crank the engine no more than five times then stop, then repeat
    Should start on the third attempt

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    Full Member Penfold101's Avatar
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    From experience - the filter should come with a new seal, always worth changing. Top up the housing after the new filter is in, and when it starts give it some revs to make sure it doesn't stall due to the air pocket in the filter housing.

    Because the tank has no pump, it relies purely on the suction of the low pressure pump on the engine to draw the fuel from the tank. What i've found is that if you start the engine and let it idle, it will draw through the air that's in the housing and it's enough to stall the engine. Getting it started after that is a nightmare without a can of easy-start...

    If you rev it once it fires up it'll still draw the air through but it can go through it due to the increased speed of the engine.

    Here endeth the lesson...

    This is all assuming they didn't change the filter setup between facelift and pre-facelift. All I had on mine was a torx screw on top...

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    Regular Member m8internet's Avatar
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    Quote Originally Posted by Penfold101 View Post
    This is all assuming they didn't change the filter setup between facelift and pre-facelift. All I had on mine was a torx screw on top...
    Same filter setup on all Vectra C diesel, just the filters that are different

  5. #5
    Full Member Penfold101's Avatar
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    Quote Originally Posted by m8internet View Post
    Same filter setup on all Vectra C diesel, just the filters that are different
    Well that's ******** to start with mate - the 1.9 filter housings are totally different to the 3.0. ironcially, for once the 3.0 setup is much easier to work with, it just needs a pump in the tank to push the fuel through instead of sucking it through...

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    If its torx bolt in the centre you dont even need to disconnect the fuel lines just lift up carefully.

    Cut the top off a 2ltr coke bottle and have that handy to drop the old filter straight in.

  7. #7
    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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    Tips...remove the filter housing, empty it and give it a good wash with some strong soap. Dry it, then fit a new filter, fill the housing with FRESH diesel and start the car up as described by Penfold101

  8. #8
    Regular Member m8internet's Avatar
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    Quote Originally Posted by Penfold101 View Post
    Well that's ******** to start with mate - the 1.9 filter housings are totally different to the 3.0. ironcially, for once the 3.0 setup is much easier to work with, it just needs a pump in the tank to push the fuel through instead of sucking it through...
    er, did actually mean all four of the 3.0 V6 CDTI (Y30DT Vectra, Y30DT Signum, Z30DT Vectra and Z30DT Signum)
    For some reasons four different filters are listed

  9. #9
    Full Member Penfold101's Avatar
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    Quote Originally Posted by m8internet View Post
    er, did actually mean all four of the 3.0 V6 CDTI (Y30DT Vectra, Y30DT Signum, Z30DT Vectra and Z30DT Signum)
    For some reasons four different filters are listed
    Ahh right - that makes more sense, my apologies. It's the same with the oil filter - they're different part numbers between the pre and post facelift models but when you order an aftermarket part it's the exact same one that turns up...

  10. #10
    Regular Member m8internet's Avatar
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    Square peg, round hole syndrome
    Even though a previous service was confirmed as 3.0 V6 CDTI, there was a slight delay as they were still waiting for a fuel filter
    Two different mechanics had worked on the car, didn't notice the difference between the old and new filter
    The new filter that had arrived was for a 1.9 CDTI, the parts department getting a right royal kicking
    Similar isses in the past as well with brakes, the smaller ones kept appearing

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