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  1. #1
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    Default Factory 4 bolt block, where's it from?

    Hey guys, first time posting

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    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by Kzr6 View Post
    Hey guys, first time posting
    .. more info would be nice
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  3. #3
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    I have one in my Torana. VN GRP A

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    Default Holden factory 4 bolt engine number help?

    Hey guys first time posting. Ive got a factory 4 bolt holden block with a vl walkinshaw manifold i bought about a year ago. It looks to be brand new and the stamped number is CDH1749 but under the CDH looks like there was originally GEM. I have no idea and just trying to chase it up to see what it may be worth.
    Cheers

  5. #5
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    Grp A walkinshaw? Not much these days, I'll give 500 for it.

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    Quote Originally Posted by immortality View Post
    Grp A walkinshaw? Not much these days, I'll give 500 for it.
    Yea sold, ahaha nah its not from the same donk as the manifold.. that was long gone. Thats why im trying to find out where its come from

  7. #7
    Not the Kingswood! hq308's Avatar
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    If it's a factory 4 bolt it's either VL or VN group A. From what I've been told previously VL main caps are straight and use the same fasteners for the inner and outer bolts where as VNs have a stepped cap. Another difference is the lifter bores, VL (mostly?) had Chrysler diameter lifers (.903") and VN had Ford diameter lifters (.875"), normal Holden lifters are .842"

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    Also HSV VP 5000i had the left over VN GPA bits incl block. Think they made 50 white ones.

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    Its definitely a VN group A block then because it has the stepped caps. I was told originally it was a left over but wanted confirmation because the number stamped doesnt help. If its a spare and never been in a car i guess that would explain it?

    Cheers fellas for the help

  10. #10
    Do you ever leave? Brettly-2008's Avatar
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    Quote Originally Posted by RedTaxi View Post
    Also HSV VP 5000i had the left over VN GPA bits incl block. Think they made 50 white ones.
    VP GTS also.

  11. #11
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    If it was a gem engine probably worth scrap value as they bored all of their engines pretty well to the max oversize. Meant they only had to set up their machines once to do a run of a particular engine, not to mention all parts were the same over/undersize.

    Check the bore size before you decide to use it.

  12. #12
    Senior Member sik66's Avatar
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    And walky blocks were Aussie pattern.....rest were turbo pattern....

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    Quote Originally Posted by cbw_09 View Post
    If it was a gem engine probably worth scrap value as they bored all of their engines pretty well to the max oversize. Meant they only had to set up their machines once to do a run of a particular engine, not to mention all parts were the same over/undersize.

    Check the bore size before you decide to use it.
    Stronger high nickel block, I'd seriously be looking at sleeving it if the bores were maxed out.

    If it's a genuine group A block you'll find the decks and mains will be counter bored also.

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