Countach engine and engine bay refresh | Page 7 | FerrariChat

Countach engine and engine bay refresh

Discussion in 'LamborghiniChat.com' started by sp1der, Nov 20, 2019.

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  1. randomlambo

    randomlambo Formula Junior

    Feb 3, 2013
    378
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    Full Name:
    DT
    If you recall how much was the wear on the liners? We found mine to be minimal wear, a few are slightly out of round, and we found they have inverse taper? They are wider at the bottom rather than at the top.

    Did you end up re-boring to the next size up or considered that option?

    Finally, is there a link to a Dino manual online somewhere? I've been spending the last two weeks translating the first half of the Lambo L406 manual to English :)
     
  2. sp1der

    sp1der F1 Rookie

    Jan 10, 2009
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    I had a couple of scored liners, and the rest would have needed an oversize re-bore which sourcing pistons for became a touch tricky, so it was easier to get new standard size liners and new pistons. Will try and get the relevant pages of the Dino manual scanned.
     
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  3. randomlambo

    randomlambo Formula Junior

    Feb 3, 2013
    378
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    Full Name:
    DT
    Thanks Simon for the info. I have looked at the options with replacing the liners and the worry from the machine shop was that they are glued in and they need special handling to remove and replace with new ones.

    Also it looks like Lamborghini wants around 1000 UKP per liner! for these, but I think they can be had aftermarket for less (?).

    The shop I talked to was willing to bore/hone the block for around the same price and recommended we custom make the pistons + rings. In the US this appears to be around 2000-2500 UKP for the 12 pistons/matching rings and they would be made to the size of the overbore (+0.2 mm?).

    Do you have any concerns with this approach or any other recommendations?

    [Sorry I don't want to hijack your thread - we can take to PM but I think many would benefit from your wealth of knowledge]
     
  4. sp1der

    sp1der F1 Rookie

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    As yours is an LP400 there would be no issue with over-boring and going with oversize pistons, the liners on the 4.0L engines were shrunk into the block (the block was heated and then the liners dropped in), on the LP5000s they are a push fit at room temp with a spacer ring so are a bit easier to remove and replace. The shop needs to make sure they use a torque plate when doing this.
     
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  5. sp1der

    sp1der F1 Rookie

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    #155 sp1der, May 4, 2021
    Last edited by a moderator: Nov 25, 2022
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  6. MiuraP400

    MiuraP400 Formula Junior

    Feb 3, 2008
    940
    Arizona
    Full Name:
    Jim
    FYI bearing clearance is a function of the crank diameter. As a rule of thumb use 0.001 inches of diametral clearance per inch of shaft diameter. This rule works for a rotating shaft down to one inch in diameter. Below one inch use 0.001 inches of clearance.

    Cheers Jim
     
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  7. randomlambo

    randomlambo Formula Junior

    Feb 3, 2013
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    DT
    What is the engine block color and was this paint originally?

    Thanks!
     
  8. sp1der

    sp1der F1 Rookie

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    As cast aluminium it has a slight purple tinge. Will be left that way.
     
  9. sp1der

    sp1der F1 Rookie

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    #159 sp1der, Jul 29, 2021
    Last edited by a moderator: Nov 25, 2022
  10. sp1der

    sp1der F1 Rookie

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    #160 sp1der, Aug 18, 2021
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  11. Adamo

    Adamo Karting

    May 17, 2014
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    Adamo Cerquozzi
  12. sp1der

    sp1der F1 Rookie

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    I had them made by Arrow Precision in the UK, I took 0.5mm out of the top pad, so will run slightly thicker valve shims. Pad depth is now 3.5mm instead of standard which is 4.0mm. Plus with modern materials, design they are just much better optimised.
     
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  13. Adamo

    Adamo Karting

    May 17, 2014
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    Adamo Cerquozzi
    You wouldn’t have the part number would you?
     
  14. sp1der

    sp1der F1 Rookie

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    Will dig out the invoice to see if there is a reference.
     
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  15. sp1der

    sp1der F1 Rookie

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    #165 sp1der, Oct 7, 2021
    Last edited by a moderator: Nov 25, 2022
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  16. sp1der

    sp1der F1 Rookie

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    #166 sp1der, Oct 25, 2021
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  17. sp1der

    sp1der F1 Rookie

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    #167 sp1der, Jan 2, 2022
    Last edited by a moderator: Nov 25, 2022
  18. sp1der

    sp1der F1 Rookie

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    #168 sp1der, Jan 11, 2022
    Last edited by a moderator: Nov 25, 2022
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  19. Looking great!
     
  20. sp1der

    sp1der F1 Rookie

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    #170 sp1der, Jan 17, 2022
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  21. Spyder-Man

    Spyder-Man Formula 3

    May 11, 2004
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    Ohh you rebel you! To match the interior ?
     
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  22. sp1der

    sp1der F1 Rookie

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    They were red before but gloss red so just changed to crackle.
     
  23. Spyder-Man

    Spyder-Man Formula 3

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    OK, obv black originally, watch out, you may have comments about originality soon ! :D
     
  24. sp1der

    sp1der F1 Rookie

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    I spoke to Del Hopkins a while ago and he remembers the car being delivered and his recollection was that the car had red wheels when delivered.
     
  25. Spyder-Man

    Spyder-Man Formula 3

    May 11, 2004
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    Red exterior paint was original right?

    Red wheels too, era of excess. love it. Any period shots available do you know?
     

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