Ferrari camshaft lobes | FerrariChat

Ferrari camshaft lobes

Discussion in '348/355' started by klfong, Jun 9, 2019.

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  1. klfong

    klfong Rookie

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    #1 klfong, Jun 9, 2019
    Hi, I've just been told by my mechanic that Ferraris (and Maseratis for that matter) do not have one piece solid machined camshafts, but that the lobes of the camshafts are heat or pressure fitted at the required angle for the correct timing of the particular engine model. Due to this method of manufacture, there have been occasion where the cam-lobe timing may slip causing mis-timing of the valve opening and closing. Can I ask if this is indeed the case for all models, and if it is, what usually precipitates such an event happening? Thanks for your comments.
     
  2. Ferrarium

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    #2 Ferrarium, Jun 9, 2019
    Here is a close up. Is you "Ferrari mechanic" a guy at the Mitsubishi tuning shop place or something or with 1 post is this a troll?

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  3. Wade

    Wade Three Time F1 World Champ
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    #3 Wade, Jun 9, 2019
  4. Wade

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    #4 Wade, Jun 9, 2019
    Apparently used on Porches.

    Recently I was sitting in a tech presentation for Porsche’s new 991.2 generation of turbocharged 911 Carreras. The MA2, as Porsche calls the 3.0-liter twin-turbo flat-six that becomes the base engine in the 911, features a host of electromechanical widgets intended to save fuel, drip by drop. Electronic control of the oil pump reduces engine load when high pressure isn’t needed. A two-stage water pump speeds the engine up to temperature for emissions and delivers only “need-based cooling” to reduce parasitic losses. A new polymer oil pan saves 4.4 pounds while being durable enough to survive the entire engine being dropped on it from a height of several feet (we saw the video). The assembled camshafts drive high-pressure pumps to deliver fuel to the injectors at up to 3625 psi and are the heart of a glorious temple of expensive, fine-tolerance machining.

    https://www.caranddriver.com/features/a15101994/have-we-reached-peak-engine-column/
    https://porsche-presskit.de/workshops/718-boxster/wp-content/uploads/718_Boxster_Tech_Workshop_Powertrain_EN.pdf
    ​
     
  5. Wade

    Wade Three Time F1 World Champ
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    #5 Wade, Jun 9, 2019
  6. klfong

    klfong Rookie

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    #6 klfong, Jun 9, 2019

    Hi, no the mechanic is the one who does my Jag XJR. He also does, Audis, Benz's, Bentleys, Rolls, BM's and Ferrari's. My Mitsubishi GTO VR4 goes to another JDM mechanic. I'm considering picking up a 348TS and am now studying this issues with old Ferrari's. My mechanic has a few Ferraris in his workshop and one of them has the problem of cam lobe slippage according to him. What model is the picture from?
     
  7. Qavion

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    #7 Qavion, Jun 9, 2019
  8. 97 Spider

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    #8 97 Spider, Jun 10, 2019
    I have 308, 348, 355, 360 cams they all look like they are old fashioned cut from one piece of steel to me. I think if this was anything close to a common (or ever) failure mode on a Ferrari people here would know about it.
     
  9. klfong

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    #9 klfong, Jun 10, 2019

    Yeah, this looks like what my mechanic was talking about. I didn't think that anyone would do this, without some kind of locking pin mechanism to prevent slippage.
     
  10. klfong

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    #10 klfong, Jun 10, 2019
    Thanks. Maybe this is a newer model type issue.
     
  11. klfong

    klfong Rookie

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    #11 klfong, Jun 10, 2019
  12. klfong

    klfong Rookie

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    #12 klfong, Jun 10, 2019
  13. klfong

    klfong Rookie

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    #13 klfong, Jun 10, 2019
    Thanks. Maybe I'll also check with my other mechanic who also looks after Porsches as well.
     
  14. Ferrarium

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    #14 Ferrarium, Jun 10, 2019
    Every Ferrari prior to 2009 is one piece that I am aware of. I suspect the ones after are as well. Anyhow the 348/355 most definitely one piece.
    Was there a specific car in question? All Ferrari's using assembled cam shafts is a really bold statement and is definitely inaccurate.
     
  15. klfong

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    #15 klfong, Jun 10, 2019
    Thanks for your reply. It really helps to clear things up. I just wanted to verify that the 348/355 series had the more conventional one piece camshafts. The car in the workshop with the problem is one of the newer generation front engined ones but I didn't get the model number.
     
  16. Ferrarium

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    #16 Ferrarium, Jun 10, 2019
    Ahh maybe Maserati GT and Ferrari California I think they are almost the same at least externally. Possibly check the California forum for details.
    Good luck!

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  17. SoCal1

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    #17 SoCal1, Jun 10, 2019
    I wish they did have press on nails !!!! I would have ghetto claws in my cams for sure
    Getting them reground then shimming up the valve springs sucks to get some motion in the ocean.



    :)

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  18. mike32

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    #18 mike32, Jun 11, 2019
    It is common practice to shrink fit thrust collars onto turbines and diesels, they do not put locking pins in them as the fit is that good. Chill the shaft and warm up the collar. Lock pins are stress points anyway.
     
  19. klfong

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    #19 klfong, Jun 11, 2019
    Thanks. Just checked with my mechanic about the Ferrari with the cam lobe problem and it is a California.
     
  20. krazykarguy

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    #20 krazykarguy, Jun 11, 2019
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    California camshafts sure look like they are one piece, too... I think that your mechanic is blowing smoke where the sun don't shine.
     
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  21. klfong

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    #21 klfong, Jun 11, 2019
    Hahahaha.... maybe he's trying to convince me not to get a 348 since he's got to maintain it.....
     
  22. Wade

    Wade Three Time F1 World Champ
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    #22 Wade, Jun 11, 2019
    First things first... get another mechanic. ;)
     
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  23. Ferrarium

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    #23 Ferrarium, Jun 11, 2019
  24. ernie

    ernie Two Time F1 World Champ
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    #24 ernie, Jun 11, 2019
    As far as I know the cams in a F119 (348 engine) are machined from a solid piece.
     
  25. klfong

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    #25 klfong, Jun 12, 2019
    Hahahahaha..... Thanks for the suggestion but he's considered an old school guru of sorts so much so even the various dealerships bring their cars to him to repair, when they can't sort it out themselves.
     
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