Stumped by this engine

Discussion in 'Engine Performance + Maintenance' started by [email protected], Jun 11, 2019.

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  1. someotherguy

    someotherguy I'm Awesome

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    You mean a 3500HD. No 'C' as there were no factory 'K' models. Sorry; couldn't resist..

    Oh and the L21's were in medium duty trucks.

    Richard
     
  2. L31MaxExpress

    L31MaxExpress I'm Awesome

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    I have worked on a 3500HD that had a L21 from the factory. Late 2000 build.
     
  3. someotherguy

    someotherguy I'm Awesome

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    Not doubting your personal experience, but pics of truck, engine, and VIN tag as proof please. :)

    Richard
     
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  4. 94burbk1500

    94burbk1500 I'm Awesome

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    I am doubting it. He's allegedly worked on every GM engine ever with every cam and intake and has dyno sheets from all of them memorized. I wouldn't be surprised if his van wasn't even his.
     
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  5. someotherguy

    someotherguy I'm Awesome

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    I'll give him the benefit of the doubt. For example, I know that the 3500HD was slated for 5.7 availability when designed but had never, ever seen one factory-equipped. It just didn't make sense to me that anyone would ever want that. Based on my experience, I did not believe they existed...until I (finally) saw a few examples of undeniable 3500HD VIN tags indicating a 5.7 original engine, ruling out dismissing them as simply being swaps in place of a dead 6.5td.

    So I won't say "never happened" ... but I also won't say "happened" until I see a tag. :)

    Possessor of the SAE whitepaper on 3500HD design,
    Richard
     
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  6. skylark

    skylark I'm Awesome

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    A very political response there Richard!
     
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  7. evilunclegrimace

    evilunclegrimace Does not always play well with others

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  8. evilunclegrimace

    evilunclegrimace Does not always play well with others

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  9. OutlawDrifter

    OutlawDrifter I'm Awesome

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    No such animal exists....2500 or 3500 had 2 gas options, 8.1L and 6.0L....they didn't build them with the 5.3L.
     
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  10. someotherguy

    someotherguy I'm Awesome

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    And that's why I'm not the GMT800 tech facts guy. :)

    Richard
     
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