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  1. #1
    VXRed
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    Default B20NFT engine primary/pre-cat part number and monolith photo request

    With the previous thread providing a primary/pre-cat removal 'how to', if anyone is able to take and post photos of a primary/pre-cat they have removed from a MY2015 on B20NFT engine, showing the externals, any stamped on part numbers and if possible a photo of any visible part of the downstream/exhaust tailpipe end of the internal catalyst monolith matrix (may only be possible through the Oxygen sensor hole), it might help determine if any changes have been made to the cat to achieve Euro 6.

    Thanks
    Last edited by Carbon Flash; 12th March 2017 at 07:02 PM. Reason: typo

  2. #2
    VXRed
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    In asking if anyone might be able to photograph the downstream/exhaust tailpipe end of a B20NFT primary cat monolith, the photo at,

    http://fa.irandelco.com/wp-content/u...-Substrate.jpg

    shows two monolith matrix patterns.

    What I am interested in is, does the matrix look like a black coloured version of the pattern on the right, or something like the pattern on the left?

  3. #3
    VXR enough AstonVauxhall's Avatar
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    EPC is only listing one primary and one 'pre-cat'

    12645535 and 13346992 respectively.

    I doubt the design would be change yet the part number wouldn't change. I'd expect to see two versions with a chassis breakpoint if that were the case, or at least the part superseding.
    Aston Vauxhall
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  4. #4
    VXRed
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    Many thanks for looking at this and replying. 2+ years ago I purchased my GTC VXR from Aston Vauxhall as you seemed more interested in them than any other dealer, and have just proved it once again.

    The fact that both catalyst part numbers remained unaltered from A20NFT>B20NFT answers my question, and I therefore accept that neither catalyst was changed to achieve Euro 6.

    If you should have the time to check that the following parts (with what I think might be the original A20NFT part numbers) did not change,

    Injector – 12636111

    Cylinder head – 12626382

    Piston – 89018108

    then I imagine we can conclude that no significant engine parts were changed to achieve Euro 6, and that the engine number change from A20NFT to B20NFT was simply an engine calibration (ecu software) change that gave a welcome reduction in CO2 emissions and VED.
    Last edited by Carbon Flash; 15th March 2017 at 03:33 PM. Reason: typo + changed wording

  5. #5
    VXR enough AstonVauxhall's Avatar
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    Don't worry, I remember, I still have the folder you gave us!

    Injector hasn't been superseded although the 'kit' for all 4 has superseded from 12633374 to 12653395

    Cylinder head with valves(12626382) rather than being superseded, is NLS. Replacement is cylinder head less valves (12626381)

    Piston hasn't been superseded either!
    Aston Vauxhall
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  6. #6
    VXRed
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    Many thanks for checking, no significant change by the looks of it with any of those items then, will sleep easier now in the knowledge the A20NFT in my 2014 Carbon Flash isn’t lacking anything , but appears Opel is working on significant changes for the future,

    https://www.avl.com/documents/198286...RDE+u.+CO2.pdf

    with the chance of a job for anyone interested in working on it,

    http://germanyjobsdb.com/details/3fb...l-october-2016

    You will be relieved to hear I’m done with folders .

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