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Thread: Inlet Manifold CDTI - Redesign

  1. #1
    Regular Member b-e-r-t's Avatar
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    Question Inlet Manifold CDTI - Redesign

    Hi,

    I have an '04 CDTI 150 Vectra with the swirl valve actuator rod that has come off the top of the inlet manifold.

    I am looking at an '07 CDTI 150 Astra on eBay and have been told the inlet manifold is still available.

    Am i right that the faulty designed manifold was changed in '06?

    Will one from an '07 Astra fit my '04 Vectra straight up?

    I did try and price a new manifold from a garage near me and they told me that this actuator rod wasn't part of it? - But it just clips on to the top of the manifold doesnt it?

    I am wondering if anyone has a picture of the new manifold with redesigned actuator rod so i can see what they have adjusted.

    Thanks.

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    You'd like to think that's it's only changed internally, but you never know. Have you tried phoning a trusted dealer with the same question?

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    Regular Member b-e-r-t's Avatar
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    Have rang 3 different VX dealerships to cofirm that new manifold design would fit and they all say they haven't come across this problem before. I am in Northern Ireland btw.

    They didn't even know there was a swirl valve actuator rod and couldn't even confirm for me that the swirl valve actuator rod actually joins onto the inlet manifold - Price quoted for manifold was only £170 - £180 which seems a bit low compared to other people's messages on here.

    There are two types of manifold according to VX - Pratola Serra and Kaisers Lantern(not sure about spelling) - think they are both the same just made in different places.

    I want to order this part but now after speaking to VX I am starting to
    doubt myself - the swirl valve actuator rod does join directly onto the manifold yeah?

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    saab are having exactly the same probs, with their 150 bhp 1.9tid (same GM engine) the modified manifold and a new actuator should be fitted together as sticking swirls can mess up the actuator signals.
    the rod from the actuator does connect directly onto a plastic "L" piece on the manifold. just make sure it is a modified manifold that your getting

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    fiat engines what more can i say lol

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    Regular Member DeanF's Avatar
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    b-e-r-t.

    I can't answer the 07 Astra Bit but can help with the rest.

    The actuator link bar that joins the four swirl valves together has not been modified in the newly designed manifold, That part stays exactly the same. You just cannot buy it on it's own.

    The Manifold casting is still the same also in the new design, the only difference is the swirl valves themselves.
    In the old design the swirl valves were one unit & the whole of the swirl valve rotated in the inlet tract, These clogged with the Soot Etc from the Egr & then jam, The also become worn where they rotate in the inlet manifold casing, again due to soot build up & then start to lift out of the seating, again jaming, This is mostly evident by the gunky mess around the external of the swirl valves.

    The new manifolds have a fixed outer sleeve within the manifold casing & then a swirl valve within that. The swirl valve itself now physically never makes contact with the manifolds aluminium casing as it did before & should not be able to lift from it's seating.

    Vauxhall say the electric actuator motor is also redesigned, But from looking at both old & new, I would say there is no difference, Same goes for the little plastic link arm that joins the motor to no:3 swirl valve.

    Hope this makes sense

    Dean

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    Regular Member rushy's Avatar
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    This may help.....or it may not.
    http://forum.vectra-c.com/showthread.php?t=33511

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    Regular Member b-e-r-t's Avatar
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    Thanks so much for that information - especially DeanF and Pedro - think i understand the inlet manifold a bit better now!

    Rushy - had a look at that fix before but the top of the swirl valves are worn in the manifold so i don't think it would work for me

    DeanF - so do you think i should get new inlet manifold AND actuator motor as well just to be safe?

    See, i have my car booked in to a diesel specialist in a few weeks - i am trying to get all the parts needed in advance.

    My head is telling me to sell the Vectra after (if) i get this problem sorted but my heart really likes it...dilema!

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    Regular Member DeanF's Avatar
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    Quote Originally Posted by b-e-r-t View Post
    Thanks so much for that information - especially DeanF and Pedro - think i understand the inlet manifold a bit better now!

    Rushy - had a look at that fix before but the top of the swirl valves are worn in the manifold so i don't think it would work for me

    DeanF - so do you think i should get new inlet manifold AND actuator motor as well just to be safe?

    See, i have my car booked in to a diesel specialist in a few weeks - i am trying to get all the parts needed in advance.

    My head is telling me to sell the Vectra after (if) i get this problem sorted but my heart really likes it...dilema!
    Difficult to answer on your behalf, But if your going to do the job you only want to visit it once, So i would replace the motor also, You would really struggle to get the actuator motor off by itself afterwards if it did fail at some point !!
    Make sure you get the electric actuator motors plastic link arm also, as they tend to go v brittle & break when you remove them.

    Once all of the above are fitted, you could then run it for a few months & then decide what to do, after all the weather should be better then & maybe a little easier to sell ..

    Best of luck ..

    Dean
    Last edited by DeanF; 20th February 2008 at 16:23.

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    Regular Member b-e-r-t's Avatar
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    DeanF - thanks again for good reply!

    I am gona go ahead and get inlet manifold, actuator motor and the motor link arm - providing the place i go to know what they are

    Thanks for your help (and others here on the forum too). Without the advice from here i wouldn't have had a clue.

    Will let you know how i get on!

    Thanks again!

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