Major service on my 348 | Page 5 | FerrariChat

Major service on my 348

Discussion in '348/355' started by Cauf61, Jan 2, 2018.

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  1. Cauf61

    Cauf61 Formula Junior

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    #101 Cauf61, Feb 24, 2018
    Yes kept it at +- 230 gr. It is rotating mass so no issue.If you don't exaggerate of course !!. The only thing , it will dampen/resist (law of motion) more the variations in rotational speed. => You will rev less fast. So not good for racing where the flywheel is made as light as possible.
     
  2. Cauf61

    Cauf61 Formula Junior

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    #102 Cauf61, Feb 24, 2018
    Damned. Broke a flywheel bolt ( at 30 ft /lbs already !) Case of metal fatigue probably. Going to buy 6 other steel 10.9 M8 bolts.


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  3. Cauf61

    Cauf61 Formula Junior

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    #103 Cauf61, Feb 24, 2018
  4. m.stojanovic

    m.stojanovic F1 Rookie
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    #104 m.stojanovic, Feb 24, 2018
    The maximum torque for M8 10.9 is 34NM (25 lbf.ft). Did you try to torque it to 34 lbf.ft?
     
  5. Cauf61

    Cauf61 Formula Junior

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    #105 Cauf61, Feb 24, 2018
    Hello M

    I did torque it at 30 lbf ft( +- 40NM). The WSM say's 34 lbf-ft which is about 46 NM ??? Am i wrong. ?
     
  6. Cauf61

    Cauf61 Formula Junior

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    #106 Cauf61, Feb 24, 2018
    Hello M
    I did look it up and you are right. M 8 10.9 is max 40NM dry and 32 NM lubricated.
    Stupid from me. Luckily i did not damage anything and the broken part was removed easily. Looking for some new bolts next week.
     
  7. 355F1SPDR

    355F1SPDR Rookie

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    #107 355F1SPDR, Feb 24, 2018
    Great work, it's really cool to see someone undergo this process themselves. Everything looks like it's coming along brilliantly, keep up the great work. I look forward to reading more about it!
     
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  8. AceMaster

    AceMaster Three Time F1 World Champ

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    #108 AceMaster, Feb 25, 2018
    Agree
     
  9. m.stojanovic

    m.stojanovic F1 Rookie
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    #109 m.stojanovic, Feb 25, 2018
    Your quoted figures are a bit on the high side. The table I have for dry and lubed (by SPIROL International Corporation) provides the following torques for M8 10.9:

    M8 x 1.25 (standard thread) - 36.5 NM dry, 27.4 NM lubed

    M8 x 1.00 (fine thread) - 39 NM dry, 29.3 NM lubed
     
  10. Cauf61

    Cauf61 Formula Junior

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    #110 Cauf61, Feb 25, 2018
    Ok Maybe mine are max,max and yours are normal use.
     
  11. steved033

    steved033 F1 Veteran
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    #111 steved033, Feb 25, 2018
    24 ft-lbs. MAX. add a drop of blue loctite,especially the flywheel side. (mine had backed out when i took delivery of the car...I knew there was something wrong, just didn't realize it was that)

    My buddy and I mistakenly did 15 ft lbs (instead of NM) in an M5 head once. no damage was done (except to the bolt...)

    sjd
     
  12. Dave rocks

    Dave rocks F1 World Champ
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    #112 Dave rocks, Feb 25, 2018
    Be careful with tables. Torque is a function of desired clamp load as specified by the engineer. Always best to use specifications over standard charts.
     
  13. m.stojanovic

    m.stojanovic F1 Rookie
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    #113 m.stojanovic, Feb 25, 2018
    I agree and I use the tables only when the WSM does not provide the torque. I thought that the 348 WSM does not provide the torque for the 6 clutch pressure plate bolts but I just saw (on page D7) a statement "Tighten the 6 pressure plate nuts to a torque of 24.6 Nm". Is this correct? What do they mean by "nuts"? The given torque is for M8 Grade 8.8 bolts and the clutch bolts are Grade 10.9 (34 Nm or 25 lb.ft). I hope this is not another error in the WSM like 0.8 Nm for the cam cap bolts.
     
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  14. Dave rocks

    Dave rocks F1 World Champ
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    #114 Dave rocks, Feb 25, 2018
    I agree also. What I do when a value is missing is look at another model's WSM and see if it's listed elsewhere. These cars are very similar and is some, not all, situations you can get the value from a different model.
     
  15. seabass23

    seabass23 Karting

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    #115 seabass23, Feb 25, 2018
    Makes sense.

    I think I'll shoot for the 200 gram number which seems to be the number that appears in most regrease threads. In my mind, this seems extra-logical given that my jar of CV-2 contains 14 oz (397 grams). Half the jar should be a pretty easy measurement!
     
  16. fdekeu

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    #116 fdekeu, Feb 25, 2018
  17. fdekeu

    fdekeu Formula Junior

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    #117 fdekeu, Feb 25, 2018
  18. Cauf61

    Cauf61 Formula Junior

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    #118 Cauf61, Feb 25, 2018
    That will be fine. Just measure the jar before and after. Then you know when +- 200gr is out. :)
     
  19. Cauf61

    Cauf61 Formula Junior

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    #119 Cauf61, Feb 25, 2018
    Hello frank

    No this ones not. Ordered the original. The TO was not to bad, but when you're in there .......
    The tensioners are HILL as also the timing shaft front bearing and tripple seals. The back here one is from Timken. ( 4 euro :) )

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  20. Cauf61

    Cauf61 Formula Junior

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    #120 Cauf61, Feb 25, 2018
    Put in the timing shaft and new (fabricated) tensioner pad.
    Anybody has the torque for the nut on the oil pump shaft and the timing shaft ?

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  21. Cauf61

    Cauf61 Formula Junior

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    #121 Cauf61, Feb 25, 2018
  22. Cauf61

    Cauf61 Formula Junior

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    #122 Cauf61, Feb 25, 2018
    Yes some little company from Goes Holland did it. I could wait on it also. 50 euro for all. Very nice and not to shiny.
     
  23. Cauf61

    Cauf61 Formula Junior

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    #123 Cauf61, Feb 25, 2018
    Good info. I loctite EVERY ( blue = 342 i think) vital bolt and nut anyway. Certainly inside an engine !

    (Except for very torque specific ones like big end, cam caps, .... of course)
     
  24. Cauf61

    Cauf61 Formula Junior

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    #124 Cauf61, Feb 26, 2018
    Made some new flywheel bolts. M8 10.9 steel. Made them to exact length ( +- 0.2mm) and weigh them. 19 gr +- 0.1 gr all of them.
    Had to grind 1.1mm from the head to get at 5mm like the torx plus bolts.

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  25. Cauf61

    Cauf61 Formula Junior

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    #125 Cauf61, Feb 26, 2018
    Measured the clearance between the pumpkin and bolt heads with the old "bondo" trick. Whitout the bearing mounted. I think with the bearing it will be more.


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