GM 3.8L V6 engine block aluminum paperweight

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Thread: GM 3.8L V6 engine block aluminum paperweight

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    2.5L Iron Duke aukc's Avatar
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    GM 3.8L V6 engine block aluminum paperweight

    I have recently obtained this and thought this might be the best place to post to try to get some more info, if there's a better forum for a topic like this, please let me know, thanks

    I've obtained a rather unusual item, hope the folks here can help me determine if it is anything interesting, it is an aluminum paperweight that I think is a GM 3.8L V6 engine block, please have a look at the photos I've attached and let me know what you think

















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    Re: GM 3.8L V6 engine block aluminum paperweight

    I would have though the 3.8L block would be bigger than that
    It looks like a block for a six cylinder chain saw!

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    Re: GM 3.8L V6 engine block aluminum paperweight

    It has the hole for the balance shaft so it must be a 3800
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    Re: GM 3.8L V6 engine block aluminum paperweight

    yes, it has the holes in the block for the balance shaft, but it has 3.8L cast in the side, I don't know what to make of this
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    Re: GM 3.8L V6 engine block aluminum paperweight

    Have you considered cleaning up the bores a bit?
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    Re: GM 3.8L V6 engine block aluminum paperweight

    There is some nasty casting flash, must have been a friday casting.

    Yeah, it has Buick all over it. The face, the skirts, the additional holes in the valley.

    It isn't a 229, so there you go.

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    Re: GM 3.8L V6 engine block aluminum paperweight

    the 4th image in the original post shows the initials ADL cast into the side of the block, any ideas what that's the abbreviation for?
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    Re: GM 3.8L V6 engine block aluminum paperweight

    I don't think GM ever did a production 3.8 in aluminum. If I'm right, perhaps they explored it and got as far as casing some scale versions to look at what of the design would need to be changed if they went to aluminum. Given how compact and light the pushrod 3.8 was, there probably was a good argument for continued development like this, which would have resulted in a very light motor if the aluminum smallblocks are anything to go by. Just a WAG.

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    Re: GM 3.8L V6 engine block aluminum paperweight

    Quote Originally Posted by Tone View Post
    I don't think GM ever did a production 3.8 in aluminum. If I'm right, perhaps they explored it and got as far as casing some scale versions to look at what of the design would need to be changed if they went to aluminum. Given how compact and light the pushrod 3.8 was, there probably was a good argument for continued development like this, which would have resulted in a very light motor if the aluminum smallblocks are anything to go by. Just a WAG.
    3.8's were compact, but they were not light. They always had iron heads and blocks.

    An all aluminum 3800 would have been interesting, if for no other reason than it being a great engine for a Fiero!
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    Re: GM 3.8L V6 engine block aluminum paperweight

    Quote Originally Posted by JT87 View Post
    3.8's were compact, but they were not light. They always had iron heads and blocks.

    An all aluminum 3800 would have been interesting, if for no other reason than it being a great engine for a Fiero!
    Not really...one reason I feel the 3800 was canned before the Chevy 60 degree V6 was due to its size from having a 90 degree bank
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    Re: GM 3.8L V6 engine block aluminum paperweight

    Quote Originally Posted by F14CRAZY View Post
    Not really...one reason I feel the 3800 was canned before the Chevy 60 degree V6 was due to its size from having a 90 degree bank
    One issue being that the 3800 wouldn't fit into the midsize platforms. It was a 'low' engine, which fit well into cars needing a low, long hood (W-bodies, H/G bodies, F-bodies).
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    Re: GM 3.8L V6 engine block aluminum paperweight

    The 3.8L was put in the A bodies early on though
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    Re: GM 3.8L V6 engine block aluminum paperweight

    Quote Originally Posted by F14CRAZY View Post
    Not really...one reason I feel the 3800 was canned before the Chevy 60 degree V6 was due to its size from having a 90 degree bank
    How so? Both were available in 2009 Model Year and unavailable in 2010 Model year with the exception of the Impala which should not count it should have been replaced in 2010.

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    Re: GM 3.8L V6 engine block aluminum paperweight

    Where did you get this? Looks like the kind of thing corporate may have had machined in-house, for demonstration purposes. They gave someone their drawings, he deleted all features too small for this scale of model (under half an inch, or something), and he told his guys to machine it. Then the big boys showed it to vendors or investors or whoever in the boardroom--it's meeting table/desk-sized. They would show it to the engineers to help them visualize what they were building.

    That's my guess...
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    Re: GM 3.8L V6 engine block aluminum paperweight

    Quote Originally Posted by F14CRAZY View Post
    The 3.8L was put in the A bodies early on though
    Yes it was. Some Buick Century models had PFI 3.8s in the mid 80s and they ran like a scalded dog.

    The 3.3 is a shorter deck 3.8, IIRC.

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