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Thread: 150cdti EGR bypass.

  1. #1
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    Trim : Sri nav

    Engine : Z19dth

    Year : 2006

    Default 150cdti EGR bypass.

    Been thinking this over.
    I've currently got an intermittent fault that only seems to appear if the iat goes over 50'c. Although the EGR is deleted in the ecu, under certain conditions, it opens up, and as I've also got the EGR blanked off a fault is thrown up.
    So, instead of blanking the EGR valve, why not block the EGR pipe at the exhaust manifold, then using one of the steel blanking plates available off eBay, drill a hole in it and weld on a short pipe just big enough to slide into one of those small k+n breather filters.

    Any thoughts?

  2. #2
    Full Member GazVXLINE170's Avatar
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    Vehicle : Insignia

    Trim : SRI VX-Line Nav

    Engine : 2.0 CDTI [170 PS]

    Year : 2015

    Mileage : 27000

    Default

    You could but I would just blank it off as what you are doing is virtually the same thing. In fact this will make the mpg slightly poor in theory as the engine would be trying to draw air in through a smaller apperture. Just mu opinion though.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    it would also have a very good chanceof setting fire to the tiny k+n breather filter

  4. #4
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    Trim : Sri nav

    Engine : Z19dth

    Year : 2006

    Default

    Quote Originally Posted by Mike DTI View Post
    it would also have a very good chanceof setting fire to the tiny k+n breather filter


    Why, when it's just drawing cool air through it?

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    Trim : Sri nav

    Engine : Z19dth

    Year : 2006

    Default

    Quote Originally Posted by Gazza4 View Post
    You could but I would just blank it off as what you are doing is virtually the same thing.
    It is blanked off at the minute, but a fault occasionally appears when iat goes above 50'c. Allowing the EGR to flow (unblanked) and introduce cooler air into the manifold on the rare occasion that it is needed.

  6. #6
    Full Member GazVXLINE170's Avatar
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    Vehicle : Insignia

    Trim : SRI VX-Line Nav

    Engine : 2.0 CDTI [170 PS]

    Year : 2015

    Mileage : 27000

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    Quote Originally Posted by mally View Post
    Why, when it's just drawing cool air through it?
    As I understand it's drawing air from the engine bay so it increases the risk of catching fire.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

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    Trim : Sri nav

    Engine : Z19dth

    Year : 2006

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    Surely the air around the engine will be cooler that the air coming from the exhaust through the original EGR pipe?

  8. #8
    Regular Member Dan_BlackSRi's Avatar
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    Vehicle : Vectra SRi

    Trim : XP NAV

    Engine : 1.9 CDTi 150

    Year : 2007

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    I think the question is what are you after, your car running the best it can, or not having a little light come on once in a while..?

    You could argue that the MAP has fully removed the EGR operation and its this that needs further work/investigation.

  9. #9
    Full Member GazVXLINE170's Avatar
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    Vehicle : Insignia

    Trim : SRI VX-Line Nav

    Engine : 2.0 CDTI [170 PS]

    Year : 2015

    Mileage : 27000

    Default

    Quote Originally Posted by mally View Post
    Surely the air around the engine will be cooler that the air coming from the exhaust through the original EGR pipe?

    But you will have a filter filled with rubbish from the engine bay alongside. personally iwouldn't do it but if as dan says it is to keep the little light happy I would just get it mapped off.

    Also the cold are from the engine won't offer the cooling effects of the Exhaust gases as the cold air will be rich in oxygen and won't serve to reduce the nox emissions.

    Gazza4
    Insignia VX-Line Nav CDTI 170.

  10. #10
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    Default

    by the looks of the first post the egr is already mapped out, yet still getting the fault

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