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Is this a top hat liner..?

Discussion in 'It's A V8 Mate!!' started by Enuff, Jan 4, 2021.

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  1. Enuff

    Enuff Well-Known Member

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    Happy new year guys and gals..
    Can anyone tell me if these are top hat liners in one of my v8 gems blocks, from a 1998 p38 ?
    There should be a couple of pics. IMG_20210104_101616_8.jpg
     
  2. kermit_rr

    kermit_rr Can't Remember Full Member

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  3. Ratae

    Ratae Well-Known Member

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  4. norseman

    norseman Well-Known Member

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    Would I be correct in saying that THL is something of a damage limitation exercise ie it doesn't prevent the original flaw occurring (cracked cylinder block) but simply prevents the liner from moving after the damage has occurred ?
     
  5. jamesmartin

    jamesmartin Well-Known Member

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    no
     
  6. jamesmartin

    jamesmartin Well-Known Member

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    nearly,top hat liners because of the step means the top part of block to liner is sealed so coolant cant seep up between liner and block likewise gasses cant seep down to the crack and pressurise the cooling system, standard liners were originally fitted down to a step so shouldnt move but are not sealed at the top, the bottom doesnt matter as it doesnt suffer the extreme temps the top does
     
    Last edited: Jan 4, 2021
  7. Enuff

    Enuff Well-Known Member

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    Many thanks for the input. Anyone recommend a top hat fitter on the M4 corridor, (near Bath) as I have 3 non thl blocks and I'm too scared to refit one without a thl.
     
  8. Enuff

    Enuff Well-Known Member

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    I would love to do it myself but my milling machine has a tolerance of +/- 4 inches to a foot.. roughly.
     
    Kev12 likes this.
  9. freelance

    freelance Well-Known Member

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    Near enough is good enough!
     
  10. norseman

    norseman Well-Known Member

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    Thank you James, think I'll stick to a 3.5 just the same :rolleyes:
     
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