Countach engine and engine bay refresh | Page 6 | FerrariChat
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Countach engine and engine bay refresh

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

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  1. raymondQV

    raymondQV F1 Rookie

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    #126 raymondQV, Apr 6, 2021
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  2. sp1der

    sp1der F1 Rookie

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    #127 sp1der, Apr 9, 2021
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  3. sp1der

    sp1der F1 Rookie

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    #128 sp1der, Apr 9, 2021
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  4. Spyder-Man

    Spyder-Man Formula 3

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    #129 Spyder-Man, Apr 9, 2021
    Better than new !! :cool:
     
  5. sp1der

    sp1der F1 Rookie

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    #130 sp1der, Apr 10, 2021
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  6. sp1der

    sp1der F1 Rookie

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    #131 sp1der, Apr 11, 2021
    Last edited by a moderator: Nov 25, 2022
    Comparison of old v new custom valve guides, the old cast iron guides were pretty brittle when they were removed. New guides have an extra groove to assist seal retention Image Unavailable, Please Login
     
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  7. ian copley

    ian copley Rookie

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    #132 ian copley, Apr 12, 2021
    May I enquire who made the valve guides and the type of alloy (assumed)
     
  8. sp1der

    sp1der F1 Rookie

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    #133 sp1der, Apr 12, 2021
    Please find link, there was a nominal set up charge and with the 24 guides the total bill was a little over £300, good company perfect product and very quick turn around.

    https://www.ultimatep.com/about/
     
  9. sp1der

    sp1der F1 Rookie

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    #134 sp1der, Apr 14, 2021
    Bit of a road-block as Eurospares are saying that timing chains are NLA? My assumption is these are common to Espada/Jarama/Countach 2v models and so can use these which are available?
     
  10. EarlyCat

    EarlyCat Moderator
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    #135 EarlyCat, Apr 14, 2021
    I would think so. Have you found any for the Jarma/Espada? Are the 4.0 2v available?
     
  11. sp1der

    sp1der F1 Rookie

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    #136 sp1der, Apr 15, 2021
    Yes seem to be able to get these just not the part for the 5000s
     
  12. Spyder-Man

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    #137 Spyder-Man, Apr 15, 2021
    Simon, can you not use the old ones as template and get new ones made up, must be a company out that can do this?
    R
     
  13. EarlyCat

    EarlyCat Moderator
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    #138 EarlyCat, Apr 15, 2021
    I'd send George Evans an email. He will know. @Chadbourn Bolles would know also.
     
  14. Chadbourn Bolles

    Chadbourn Bolles Formula Junior
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    #139 Chadbourn Bolles, Apr 15, 2021
    The ESPADA/JARAMA and the 5000S chains ARE NOT THE SAME AS THE QV ENGINE. I have the chains. Price is $140.00 each plus postage/packing cost.
     
  15. Chadbourn Bolles

    Chadbourn Bolles Formula Junior
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    #140 Chadbourn Bolles, Apr 15, 2021
    Sorry I was thinking you were building a QV engine. I also have the chain for the 5000S price $140.00 each plus packing/postage cost.
     
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  16. sp1der

    sp1der F1 Rookie

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    #141 sp1der, Apr 24, 2021
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  17. sp1der

    sp1der F1 Rookie

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    #142 sp1der, Apr 26, 2021
    Hopefully got arrow precision lined up to make some new cam followers
     
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  18. sp1der

    sp1der F1 Rookie

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    #143 sp1der, Apr 28, 2021
    Thankfully Eurospares are trying to resolve the bearing situation with Lamborghini despite being Vandervell and the right part number they are clearly the wrong part and look more like Miura parts that have the shallower tang.
     
  19. Spyder-Man

    Spyder-Man Formula 3

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    #144 Spyder-Man, Apr 28, 2021
    I’m not a fan of Eurospares. i’ve had parts sent that were clearly not correct. Have you contacted Lambo parts? Be surprised what they may have.

    R
     
  20. randomlambo

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    #145 randomlambo, May 2, 2021
    Did you resurface the block before the liners went in?
     
  21. randomlambo

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    #146 randomlambo, May 2, 2021
    Simon what are you using as a reference for the engine rebuild numbers, I understood some of the scanned manuals that are floating around have errors?

    I'm going through the same issues with a 4.0L engine...
     
  22. sp1der

    sp1der F1 Rookie

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    #147 sp1der, May 3, 2021
    Using a combination of original parts manual to ensure correct parts are used, and then the L406 engine manual but cross referencing back to a Ferrari 308 workshop manual to see if the numbers look sensible. The liners, pistons, valves, tappet buckets, guides etc are all new taking dims from the manual and measuring the old parts. So the valves are from Manley, Liners from Westwood, Pistons from CPS, Guides from Ultimate performance and Tappets from Arrow Precision as generally the OE parts are of questionable quality and materials/processes have moved on since these cars were built. The block was true so have not re-faced, the liners are all slightly proud as they should be and there were no signs of any head gasket issues when I tore it down. It really needed valves guides/seals and there was a bit of liner wear.
     
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  23. randomlambo

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    #148 randomlambo, May 3, 2021
    Thanks that's very helpful -- what about bearings, mains/journals, did you have a separate source for that? I think in an earlier post you mentioned that the factory originals were not great (and the prices that I have seen have made me do a double take).

    Measuring my crank diameters it does look like we have to grind the crank down to the next bearing undersize but I'm thinking we need to get a set of bearings to measure to make sure they are correct? Also the clearances I have seen are within 0.025 mm (0.001"), has this been your experience as well?
     
  24. randomlambo

    randomlambo Formula Junior

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    #149 randomlambo, May 3, 2021
    Ex: for cranckshaft, from L406 manual:

    (a) normal diameter of mains = 62.979 - 62.966 mm; mine measured: 62.91 - 62.96 mm on a quick check;

    (b) journal diameter = 43.604 - 43.594 mm; mine measured: 43.54 - 43.56 mm

    also in the con-rod section it shows the internal diameter of the bearings is 43.680 - 43.658 mm which allows for 0.065 - 0.075 mm of clearance -- is that reasonable?
     
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  25. sp1der

    sp1der F1 Rookie

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    #150 sp1der, May 3, 2021
    The fits look ok I have checked the crank drawings and the dims are good in the manual. For reference the Ferrari Dino manual states 0.056-0.099 as the assembly limit on the exact same small end dims 43.619-43.637. I got my bearings from Eurospares which seem to be a rummage through nos at the factory. For the mains 0.041-0.090 on again very similar dims 62.948-62.966.
     
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