Sleeved 454?

Discussion in 'The Engine Bay' started by MOBK5, Apr 13, 2019.

  1. MOBK5

    MOBK5 1/2 ton status Premium Member

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    I picked up this 1991 tbi 454 and started the tear down. Never disassembled an engine before but I have done a ton of research and I’m extremely comfortable with this task. But... is this block sleeved? Looks nothing like any bare 454 or even sbc blocks I’ve seen.

    If so, can anyone give me the pros and cons of this?

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  2. beags86

    beags86 Eastbound and Down Premium Member

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    Run it and don't worry about it.
    If done properly, and it probably was or else it wouldn't still be running. It's fine.
    If your going to build 1,000hp with that engine I would probably look for a different block. But for a stock-500hp level. Don't worry it would be fine.
     
    Last edited: Apr 13, 2019
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  3. sweetk30

    sweetk30 selective wrench turner guy Premium Member

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    look like cast in valve relief spots .

    sleeving a whole block that's super common = waste of money .

    i would be looking for rust problems or frozen busted out areas of the block by the looks of the bottom end with the pan off .
     
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  4. nvrenuf

    nvrenuf Next weekend... Premium Member

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    4 bolt main!

    Any idea on what Gen block? 4 or 5? I think 92 was the change to the Mark 5 motors.

    What heads will you use?
     
  5. MOBK5

    MOBK5 1/2 ton status Premium Member

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    100% correct on not being sleeves. Looks normal after a clean up. So... what’s up with the grinder gouges at the bottom of the cylinder? All cylinders have it to some degree.

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    I’m going to have the bare block dipped after I fully strip it down, then I’ll have a good look at it. Most of that thick rust is surprisingly just surface rust. I bought this cheap with no idea if it ran or not. To be honest I wanted to learn something new and this sounded fun.

    Ignore the mess. Doing this outdoors in a driveway is frustrating at times.
     
    Last edited: Apr 13, 2019
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  6. diesel4me

    diesel4me 1 ton status Premium Member

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    The few sleeved BBC engines I've seen ,the sleeve was about 1/8" thick,and easily noticed..that engine doesn't look like it has one to me ..:dunno:
     
  7. MOBK5

    MOBK5 1/2 ton status Premium Member

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    10069286 Big Block V8 1990-1991 454, 4 bolt, Mark IV, Short deck

    I haven’t decided exactly how much I want to sink into this. My goal is 500 hp from bolt ons and stock heads can handle that but who knows. I’m not interested in having the block bored out unless it is necessary.
     
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  8. MOBK5

    MOBK5 1/2 ton status Premium Member

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    I was being an amateur. Hopefully I shook that off.

    Maybe my makeshift balancer removal “tool” will help someone in a jam one day and make up for all this.
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    Last edited: Apr 13, 2019
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  9. 4X4HIGH

    4X4HIGH 1 ton status Premium Member GMOTM Winner

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    Those are valve reliefs and are factory.
     

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