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Thread: 2.5 24 valve head

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  1. #1
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    Re: 2.5 24 valve head

    Look identical to me?
    Can anyone confirm the 3.0 and 2.5 heads are the same?
    Anyhow, looks like you might need to hang on to this Leigh? Or would you be willing to part with it?
    Attached Thumbnails Attached Thumbnails 20250323_184113-COLLAGE.jpg  

  2. #2
    SEC Member Fingers's Avatar
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    Re: 2.5 24 valve head

    I've got the two side by side in my garage too. I've had a look in the past and the only difference I can see is the port and valve size for the larger engine. When I get home this afternoon I can have a better look at both. All the cam covers from various 24v engines are interchangeable, the later ones have a breather outlet on both cam covers rather than just one.
    Paul.

    Sat in a real one, may never wash again!

  3. #3
    SEC Member Fingers's Avatar
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    Re: 2.5 24 valve head

    Here you go, a couple more pictures for comparison. The 2.5 head is the one on the left of the first picture or on the top of the following pictures, the other is a 3 (actually 3.2, but they’re the same). You can see the manufacture dates in the first picture. Valve sizes for the 2.5 are 29mm in, 25mm exh, 3 litre is 31mm in and 26mm exh. Ports are visibly bigger too.

    Click image for larger version. 

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    Last edited by Fingers; 24-03-2025 at 06:54.
    Paul.

    Sat in a real one, may never wash again!

  4. #4
    SEC Member LPH_UK's Avatar
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    Re: 2.5 24 valve head

    Quote Originally Posted by john View Post
    Look identical to me?
    Can anyone confirm the 3.0 and 2.5 heads are the same?
    Anyhow, looks like you might need to hang on to this Leigh? Or would you be willing to part with it?
    I need it at the moment but might part with it in a bit. I shouldn't have replied to your post, I forgot about my inlet project

    What are you going to do with it? You can but a 2.5L head on ebay for about ?70

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