Holt 75 from Italy

Discussion in 'A Work In Progress' started by Foketry, Jan 6, 2019.

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  1. Jan 9, 2019 #21

    gbritnell

    gbritnell

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    One thing you might consider while you're at this stage of the build is to see if you can adapt some type of seal (0-ring) into the front and rear main bearings. Even though my engine has very small clearances once it gets warm it does leak oil past the bearing. Another leak area which I don't think can be fixed without considerable modifications to the original drawings is the lifter guides. Here again even with a close fit the pumping action of the liter in the guide tends to draw oil up around the lifter and it seeps down the block. It's not bad but annoying. My engine is mounted to a set of skids made from wood and I have created 2 drip pans from brass sheet which straddle the skid. This help to keep the engine much neater when running.
    gbritnell
     
  2. Jan 9, 2019 #22

    gbritnell

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    Here are two pictures of my engine with the drip pans.
     

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  3. Jan 9, 2019 #23

    Foketry

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    IMG_8150.JPG
    the roughing of cylinder
     
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  4. Jan 10, 2019 #24

    Foketry

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    IMG_8171.JPG IMG_8167.JPG
    roughing of the crankshaft on the milling machine
     
    Last edited: Jan 10, 2019
  5. Jan 10, 2019 #25

    Foketry

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    Last edited: Jan 10, 2019
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  6. Jan 10, 2019 #26

    Foketry

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    IMG_7796 (1).JPG IMG_8177.JPG

    Crankshaft grinding on lathe tool post
     
    Last edited: Jan 10, 2019
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  7. Jan 10, 2019 #27

    Foketry

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    crankshaft assembled on crankcase
     
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  8. Jan 10, 2019 #28

    Foketry

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    Thanks for suggestion, i keep it in mind
    My crankshaft is round, maybe it will lift less oil qty than a flat crankshaft, i hope....:( , i'm going to put some Oring
     
    Last edited: Jan 10, 2019
  9. Jan 11, 2019 #29

    necchiom

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    Wow: Awesome project and realization! Bravissimo.
     
  10. Jan 12, 2019 #30

    rodue

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    IMG_0258.JPG One problem with the one I built and one my friend built is with out a oil ring it throw a lot of oil. That may be brought on by the crankshaft Your construction of the crank may illuminate that problem. I built this deflector to help keep the engine clean
     
    Last edited: Jan 13, 2019
  11. Jan 14, 2019 #31

    Foketry

    Foketry

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    Thanks for the suggestion, i ave already ordered the spark plugs long reach in USA (S/S Machine OH)

    IMG_8165.JPG

    The partially worked heads

    IMG_8166.JPG partially worked heads
     
  12. Jan 14, 2019 #32

    Foketry

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    IMG_8210.JPG

    The electrode spark plug is uncovered and not inside a hole as the original project ( this head is a casting scrap)
     
  13. Jan 14, 2019 #33

    Foketry

    Foketry

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    Manifold TEE for wather manifold
     
  14. Jan 14, 2019 #34

    Foketry

    Foketry

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    Rocherarm pedestal
     
  15. Jan 14, 2019 #35

    Foketry

    Foketry

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    IMG_7807.JPG IMG_7808.JPG

    The connecting rods
     
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  16. Jan 14, 2019 #36

    rodue

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    great work its nice to have that equipment to mill I am doing the old way and too late to make changes.
     
  17. Jan 15, 2019 #37

    Foketry

    Foketry

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    I had a manual milling machine and a manual lathe.
    I bought Chinese drives, italian ball screws and i did the wiring .
    I converted them into CNC machines with great satisfaction
    But i think if i have been able to transform the machines, anyone is able to do this.

    A question, why did you put the bent copper tube in the exhaust manifold ?
     
    Last edited: Jan 15, 2019
  18. Jan 15, 2019 #38

    Foketry

    Foketry

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    IMG_7888.JPG

    IMG_7889.JPG

    A pair of cams (double)
     
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  19. Jan 16, 2019 #39

    Foketry

    Foketry

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    IMG_7882.JPG IMG_7886.JPG

    The gear case



    IMG_7885.JPG

    Distributor gear case
     
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  20. Jan 19, 2019 at 5:48 PM #40

    Foketry

    Foketry

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    IMG_7893.JPG
    Timer Body
     
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