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Thread: CDTI Engine identity crisis - 120 or 150?

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    Full Member Teapot's Avatar
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    Default CDTI Engine identity crisis - 120 or 150?

    I have a 2004 Signum 1.9 CDTI. It was sold to me (used) as a 120, and comes up as a 120 when I put the reg number into insurance web sites, etc. However, I always thought it went better than I would expect for a 120.

    By comparing all the info on this forum with my engine, mine appears to be a 150. It has the oil filler cap on the right (viewed from in front of the car) and when I took the cover off to change glow plugs recently I could see that it also has swirl valves, which are not meant to be present on the 120.

    I'm sure there must be a logical explanation for these differences, other than the previous owner having done an engine swap! Your comments will be greatly appreciated....

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    Regular Member Jezzy's Avatar
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    Maybe the engine packed up and someone stuck in the 150 instead.

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    Regular Member markm's Avatar
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    Some of the early 120's were in fact de-tuned 150's, so in theroy you could have a 120 and remap it up to around 200bhp

    I'm sure someone will be along to confirm but check out the likes of regals web site, they give details of the 120-200 remaps,

    I know what I would be doing,

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    Regular Member Hideous's Avatar
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    oil cap on the right, centrally placed front to back = 150 CDTI
    the issue about whether its 120 or 150 on websites etc, is because someone mistaken (or otherwise) informed that it was the 120 version.
    It's the 16v version - to double check, make sure it has a fantastic, durable part called the swirl valve inlet manifold, then you can be 100% certain its a CDTI. edit: ah, you've already done that.
    is your badge red like that^

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    Full Member Teapot's Avatar
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    Quote Originally Posted by Hideous View Post
    oil cap on the right, centrally placed front to back = 150 CDTI
    the issue about whether its 120 or 150 on websites etc, is because someone mistaken (or otherwise) informed that it was the 120 version.
    It's the 16v version - to double check, make sure it has a fantastic, durable part called the swirl valve inlet manifold, then you can be 100% certain its a CDTI. edit: ah, you've already done that.
    is your badge red like that^
    Yep, badge has red TI as you suggested. Intake manifold c/w ultra-durable swlirl valves and DMF were replaced by vauxhall dealer at the previous owners expense only a few months before selling - so hopefully I won't have any issues in that department for another year or two.

    As one of the previous respondees suggested, it could be a 'detuned 150'. Why would this be? Doesn't seem very logical to me.

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    Regular Member markm's Avatar
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    Quote Originally Posted by markm View Post
    Some of the early 120's were in fact de-tuned 150's, so in theroy you could have a 120 and remap it up to around 200bhp

    I'm sure someone will be along to confirm but check out the likes of regals web site, they give details of the 120-200 remaps,

    I know what I would be doing,
    Here is the engine code : Z19DTJ Standard Performance 120PS IPF Performance 200

    Check your engine code bud
    Z19DTJ120PS200 hp

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    Regular Member barney490's Avatar
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    As i understand it, the Z19DTJ was only ever used in Astra H. Easy way to check if its the engine that the car left the factory with is, call the dealer, give them your reg and they can check engine type and number. I very much doubt anyone would go to the bother of fitting a 120 with a 150 engine.

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    Join the club! i had the exact same issue...you can see the post here that i hijacked:

    http://www.vectra-c.com/forum/showth...64#post1359764

    i ended up ringing vauxhall customer care in the end (dealer said 120) and they verified it was a 150 and have since sent me letter to confirm it.

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    Regular Member Handyandy-UK's Avatar
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    Wouldn't the engine code be on the V5 (I know mine is)?

    Failing that any of us with EPC should be able to put the VIN or Reg in and get a decode of it's original factory spec.

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    Regular Member Ziggy's Avatar
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    If it is a 150 Id be pretending you never did the checks you had and sticking with the your cheaper tax and insurance of a 120

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