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Cylinder Liner removal - 12J and 19J specific

Discussion in '2.5 N/A' started by 1983, Sep 7, 2020.

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  1. 1983

    1983 Member

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    Hi everyone.

    I was told a long time ago removing the dry liner on these engines was near impossible or required machining out. Is this the case?
    Having had a look at a bare block I have here it looks like they are blind fitted with nothing to hook onto to pull them out.
    I was wondering if welding a bar into the bore and pulling on that may work?
     
  2. Flossie

    Flossie Well-Known Member

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    Not 100% but I don't think they have liners do they?
     
  3. 1983

    1983 Member

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  4. 1983

    1983 Member

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    There is definitely a liner looking line around the cylinder if looking from the top face of the block. But from underneath all I see is casting. So im presuming (Rightly or wrongly) they were pressed into a blind hole from factory?
     
  5. jamesmartin

    jamesmartin Well-Known Member

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    red blocks are not linered from the factory,liners have allways been offered as an option when a block had been bored to the max +60 at the time and needed another rebore,you fitted a liner and bored that to fit standard pistons,liners need to be machined out
     
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  6. Flossie

    Flossie Well-Known Member

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    Again, not 100% but that link also shows oversize pistons.
    Liners are (maybe) to restore a block that won't take another re bore?
    @jamesmartin might know...
     
  7. Flossie

    Flossie Well-Known Member

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    Typing whilst you posted James:oops:
     
  8. 1983

    1983 Member

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    I see, so you bore out the block to accept a liner right?
     
  9. 1983

    1983 Member

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  10. jamesmartin

    jamesmartin Well-Known Member

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    liners are pressed in with a 3-4 thou interference fit, thats a big press
    those types are much harder/require more skill to get a perfect bore than a machine shop spec
     
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