1275 exhaust manifold

11 comments

  1. imported post

    The partnumber of an exhaust manifold for a 1275 S is 12A271, which was replaced by 12G615. Attached you find a picture of a NOS example (it is NOT for sale). These exhaust manifoldswere known to crack near at the bottom end.

  2. imported post

    That isfrom an 1100/1300 variant such as Wolseley or Vanden Plas. You see loads of these being touted as Cooper manifolds but they are not.

  3. imported post

    Hmm. Have seen these before and always thought they were 997 or 998 Cooper but I just checked and these engines also have 12A271 as partnumber listed for their exhaust manifold. The one on the photo in my previous posting is labelled 12G615 (leyland label), which replaced the 12A271 for 1275 S engines according to AKD3509.

  4. imported post

    Sorry for late intervention on this post but as I'm now dealing with this problem, mine is in poor condition, but as far as I've understood from several contacts, its nowadays impossible to found one NOS (anyone?). Anyway it seems that 12G615 (Cooper S) and 12G271 (cooper) are different. Is that so, and how to recognize the differences? 'S' manifold is a little bit taller ?

    Thanks:)

  5. imported post

    [b]Mk 3 S Meister wrote: [/b] “That isfrom an 1100/1300 variant such as Wolseley or Vanden Plas. You see loads of these being touted as Cooper manifolds but they are not.”
    Sorry for late intervention on this post, but as I'm now dealing with similar problem, I would like to know the differences between this one in the photo and 12G615 (Cooper S) and 12G271 (Cooper). Mine looks like the one on the pic, but its complete.

    Also I can't find the part (suport/bracket) to fix the exhaust manifold to the 'engine/diff'. There is any special part for this purpose?

    Would appreciate your help! Thanks:)

  6. imported post

    [b]CT4NH wrote: [/b] “Also I can't find the part (suport/bracket) to fix the exhaust manifold to the 'engine/diff'. There is any special part for this purpose?

    If I'm not mistaken the original S manifolds were not attached to the diff housing, which is most probably the reason why they tend to brake at the down curve.

  7. imported post

    Thanks! Perhaps that would bethe reason why I cannot find the bracket.

    But stillthe doubt about the differences between 12G615 / 12G271 (if these are equal!) and the others (Wolseley, Van den Plas) apparently equal…

  8. imported post

    I checked out my 1071 manifold and it looks 'similar' to the one in the photo. Its hard to compare but the main downtube of mine looks larger and more oval in shape (or perhaps more like a flattened cylinder). The side seams continue all the way down to the bend. The bend (oval section with side seams)continues around into the horizontal plane and then has a welded on circular cross section piece about 2inches long – presuambly to mate with the exhaust pipe.

    It all looks pretty unmessed with and there is no sign of a bracket for attaching to the gearbox.

    Cheers, Ian

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