Methods to find TDC?

Discussion in '348/355' started by Dave rocks, Dec 25, 2017.

  1. FerrariChat Miami - Earlybird $ ENDS August 24th at 5pm. https://www.ferrarichat.com/forum/threads/ferrarichat-miami-earlybird-ends-august-24th-5pm.582547/ Everything with the event is confirmed and all deposits paid. We already have a double digit number of cars entered including 430 to 488's and 599 to 812's sprinkling in some Californias and classics like 328's. Yes, we have Lamborghinis and McLarens too. We're staying at the Ritz Carlton - Key Biscayne on the beach with events at Homestead Race Track, Miami Design District, The Deck, and Curtiss Mansion.
  1. taz355

    taz355 F1 Rookie
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    Iam afraid to say I did not understand what you posted and I did not want to read it twice to figure it out. Ha ha

    I was talking the ferrari method for timing cams. As Dave stated he allready said their method to find tdc. But even this has not been confirmed by Mitchel, fbb, or any others that use it to the best of my knowledge within this thread.
     
  2. johnk...

    johnk... F1 Veteran
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  3. Dave rocks

    Dave rocks F1 World Champ
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  4. johnk...

    johnk... F1 Veteran
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    I was going to search for that post because I remembered having that compensation, or a similar one, with him a few years back. Nice to see you did it for me. Actually the one I was thinking of was about replacing seals. Brian commented that it was unnecessary to do at every belt change. But same thought.
     
  5. FSM348

    FSM348 Karting
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    Well, thanks guys for splitting the hair to the point of needing Atomic Force Microscopy to see the result. Seriously, I'm coming up on checking timing on my 348 once I get my butt back out into the garage and this thread has really been interesting to read.
     
  6. fatbillybob

    fatbillybob F1 World Champ
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    OMG dave! So you would be willing to spend what 10 hours and drain a bunch of fluids, rebleed the clutch, and rebleed the brakes etc etc to remove the engine and just swap belts? So when a cam seal starts leaking you will happily pull the motor again? Yeah RD said it but do you think he or his customer would be happy if customer spends 2k for belt swap and the cam seal then leaks? Who pays for that motor to come out again? Can you see that fiassco posted on fchat? I'm thinking tar and feathers. Silly dave just silly. Again just another case where reality rolls all over your love of theory.
     
  7. FlyingHaggisRacing

    FlyingHaggisRacing Formula 3
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    Question.....
    Over say 3 or 5 year interval what might be the typical and worst-case amounts of belt stretch that have been seen, but yet the engine is running reasonably well ?
     
  8. johnk...

    johnk... F1 Veteran
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    #183 johnk..., Jan 4, 2018
    Last edited: Jan 4, 2018
    My God is right. It's not like cam seals go from leaking to OMG the dam just broke over night. Experience as taught me they tend to start weeping a little and typically stay that way for a long time. If a cam seal started leaking like that a month after an engine out you could easily wait until the next schedules engine out to take care of it.

    This is exactly the type of thing that give 355 a bad wrap. People insist in doing corrective maintenance as preventive maintenance because, well, "while we're in there".

    I can answer that question base on 25 year old belts from my 308. On my 308 the 25 year old belts, on the car for 25k miles, deviated from the design length by 0.8mm and 1.0 mm respectively. The tolerance for new belts is +/- 0.75mm from the design length.
     
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  9. fatbillybob

    fatbillybob F1 World Champ
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    No. What give all Ferrari's a bad rap is not fixing the cars while paying attention to detail with sound plan for repair and maintenance.
     
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  10. Dave rocks

    Dave rocks F1 World Champ
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  11. steved033

    steved033 Formula Junior
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    awesome! works on a 348 too?

    sjd
     
  12. Dave rocks

    Dave rocks F1 World Champ
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    If it's the same thread as a 355, it should. I've not had the time to check fitment with other models which would be ideal to make one tool to fit several. In theory, as long as the threads are the same, the tool should work across other models providing it's not too long. I designed it long so it can be installed / removed with the knurl from the top and not dropping down the cam covers.

    M10 x 1.0 thread.
     
  13. steved033

    steved033 Formula Junior
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    looking up spark plug thread sizes, it looks like I'm 12mm threaded.

    sjd
     
  14. Dave rocks

    Dave rocks F1 World Champ
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    I believe Ferrari uses M10, M12 and M14. We will design and build others as time permits.
     
  15. yelcab

    yelcab F1 Veteran
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    Does not work on 348 !
    Will work on some motorcycles.
     
  16. Dave rocks

    Dave rocks F1 World Champ
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    Mitch - if you are willing to test an M12 on a 348, we will make a prototype and send it to you. I need to determine what threads are used on each model so we can make univeral tools to cover all models that share the same thread.
     
  17. yelcab

    yelcab F1 Veteran
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    Send it to me, I will test it.

    M
     
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  18. taz355

    taz355 F1 Rookie
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    Mitchells hard ontools Dave. Ever seen the bent wrenches he used to get the 355 power steering line off with.
    Hopefully they are T1
     
  19. Dave rocks

    Dave rocks F1 World Champ
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  20. taz355

    taz355 F1 Rookie
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    Cases?

    I dont need no stinkin cases!!!
     
  21. johnk...

    johnk... F1 Veteran
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  22. Dave rocks

    Dave rocks F1 World Champ
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    Yes. We will be making a video. Or, a few videos:)
     
  23. fatbillybob

    fatbillybob F1 World Champ
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  24. Dave rocks

    Dave rocks F1 World Champ
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    Stay tuned. We will prove it is the most accurate way. Although even with proof, I know you won't belive it.
     
  25. Beetle

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    8 pg's of how to find TDC.????????????????????? See a mechanic.
     
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