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  1. #1
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    Default To sleeve or not to sleeve?

    I have a 308 block at the machinist at the moment and 6 of the bores are fine at 40 over but two are still pretty bad at 40. Will need two sleeves to be used.

    Any cons to sleeving?

    Or should I source another block?

    Appreciate any feedback.
    Last edited by Fieds83; 29-01-2019 at 12:45 PM.

  2. #2
    AED
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    What power level? What usage?

  3. #3
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    HI
    From my experience thickness of bores is a good thing for a high hp motors .Something todo with how heat is transmitted to cooling jacket.
    Could sonic test the cylinders ,but its not 100% guaranteed
    Do u have access to another block . Understandably if a block has standard bores its worth the most $$ . Depends on all the other wearing parts also,, cam bearings /crank &brgs , cooling cast iron jacket corrosion , mains cap walk.


    I paid $75 for a TH400/308 block at .030 but everything except the crank/ block is stuffed .

  4. #4
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    I was aiming around 400-450 hp for this build. The crank is good, cam bearings were removed and it was hot tanked.

    I could try to source another block but for the sake of convenience and the fact that the car is registered with this engine number I am considering the sleeves.

    It adds another $330 to the prep and realistically a virgin vs block could be had for that money.

  5. #5
    Do you ever leave? paulzig's Avatar
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    Quote Originally Posted by Fieds83 View Post
    I was aiming around 400-450 hp for this build. The crank is good, cam bearings were removed and it was hot tanked.

    I could try to source another block but for the sake of convenience and the fact that the car is registered with this engine number I am considering the sleeves.

    It adds another $330 to the prep and realistically a virgin vs block could be had for that money.
    You can buy a whole VN headed engine for $500, keep the block sell the rest...

  6. #6
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    HI
    re engine no.
    Just notify the authorities either by phone or probably have to in writing . With luck online . Happens with reco engines all the time .

    Whats the cost on sleeving 8 cylinders . Very costly to do only 2 and still have an engine that's .040 over. If u ever considered selling it 8 new sleeves and a standard bore might be good .
    Hard choice because the machine works already costing u I assume

  7. #7
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by Fieds83 View Post
    I have a 308 block at the machinist at the moment and 6 of the bores are fine at 40 over but two are still pretty bad at 40. Will need two sleeves to be used.

    Any cons to sleeving?

    Or should I source another block?

    Appreciate any feedback.

    Tri block or Turbo?

    if turbo, get a late model VN EFI and do the engine number change

    if Trimatic get the thing sonic'd or xrayed before making any decision
    you need to consider the wall thickness of other cylinders. No use wacking
    in a sleeve surrounded by rusty thin cylinder walls ( I am THE expert on those).
    If having a sleeve done you must also check the deck thickness both sides of the cylinder
    (you are putting the sleeve in) Just gotta remember these blocks are 30
    years at their youngest
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  8. #8
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    Have heard that if you sleeve more than one cylinder on each bank you lose block rigidity which is critical at higher hp/rpm levels. Not sure at what stage sleeving more would become an issue.

  9. #9
    been here .......too long Smitty2's Avatar
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    Quote Originally Posted by cbw_09 View Post
    Have heard that if you sleeve more than one cylinder on each bank you lose block rigidity which is critical at higher hp/rpm levels. Not sure at what stage sleeving more would become an issue.

    I know those who have 8 sleeves in an early block
    and have mods for more hp but need the 'authenticity'
    of an actual early 'cast date' + engine number

    depends on the engine shop and deck thickness


    ps... all sleeves ain't cheap!
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  10. #10
    AED
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    We charge 130 to fit each sleeve and 38 for the sleeve, all + gst.

  11. #11
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    Hi
    What does a torque plate hone cost these days AED . New SHP block [chevy] finish hone required only apprantly.

    Deck block to get piston to deck of .015 as new deck 9.025 .1 piston on rod check all 4corner

  12. #12
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    If I was faced with this I would sonic check the block & if passes, bore to 60 assuming this is not a high HP engine. Then after it is worn at 60 sleeve all 8 if the block is worth it or source another. I have a block at std bore that has 8 sleeves works fine.... some say they are actually stronger with sleeves idk, and the sleeve material is superior to the block material,, this i would believe.

  13. #13
    AED
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    Quote Originally Posted by swampy View Post
    Hi
    What does a torque plate hone cost these days AED . New SHP block [chevy] finish hone required only apprantly.

    Deck block to get piston to deck of .015 as new deck 9.025 .1 piston on rod check all 4corner
    Give me an email to talk, enginedynamics@bigpond.com Rod.

  14. #14
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    HI
    I have had both sleeves replaced on air cooled v twin stationary engines . Results were impressive . Lower oil consumption from
    thicker walled sleeves compared to original
    better quality sleeve material
    better quality honing than factory
    less oil consumption

    The sleeves are pressed in and locate on a step in the old block casting and retained by head gasket

    How a sleeve is done in a car block dunno ? Do they completely remove the old sleeve and thereby run a wet sleeve I suspect they do .

  15. #15
    Do you ever leave? HQ308Ute's Avatar
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    never sleeved an old V8, must need the numbers to make it all legit yeah? anyway carry on.

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