365GTC Blown Motor Repaired | FerrariChat

365GTC Blown Motor Repaired

Discussion in 'Vintage (thru 365 GTC4)' started by Jacob Potts, Dec 21, 2016.

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  1. Jacob Potts

    Jacob Potts Formula Junior

    Dec 11, 2008
    352
    Pueblo, CO
    Full Name:
    Jacob Potts
    An in-depth look at how Bill Losee's Eurotech Performance in Riverside, California repaired a blown motor for a 365GTC.

    Can this Ferrari V12 be saved?
     
  2. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
    37,099
    Cowboy Capitol of the World
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    Brian Crall
    And that is why a lot of us do not use Ferrari rods.

    Broke in the middle of the beam, no sign of bearing or piston issues. Seen that before.
     
  3. John Vardanian

    John Vardanian F1 Rookie

    Jul 1, 2004
    3,080
    San Francisco Area
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    John Vardanian
    Probably caused by habitual high revving a cold motor; first you bend a rod or two then after awhile one of them snaps. Dennis Etcheverry can likely weld up the block; if he can't then hopes are slim.

    john
     
  4. 166&456

    166&456 Formula 3

    Jul 13, 2010
    1,723
    Amsterdam
    High revving a cold motor can cause damage, but not this kind of damage.
    This is caused by bad material, overrev event(s), probably but not necessarily a combination of both. An overrev (misshift or otherwise) many years ago could have laid the seeds for this failure today. Perhaps it was there before the poor guy driving it enthusiastically had it explode under his feet. Or perhaps not and a misshift on his behalf cracked it. No way to know in hindsight.
    Such is the nature of metal fatigue - once a crack starts, it progresses slowly until it gives.
    The only sure way to prevent it is to install more resilient rods, a rev limiter and a rev monitor (as misshifts cannot be prevented by a limiter, monitoring them is useful). Most modern cars have overrev event registers in their ECU.
     
  5. steve meltzer

    steve meltzer Formula 3

    Sep 18, 2004
    1,219
    with Enzo 8995
    This is most interesting (unless you're the owner), so thanx for posting. s
     
  6. TTR

    TTR F1 Veteran
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    Mar 29, 2007
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    Timo
    Title and above descrption perhaps slightly misleading. I saw Bill yesterday morning and asked about this. All he's done so far is taken the engine apart.
     
  7. fiatosca

    fiatosca Formula Junior

    Feb 20, 2013
    412
    Bloomfield Hills, MI
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    Bob B
    Photos in article would seem to indicate that this is a 365 GTC/4 engine rather than a GTC.
     
  8. Cobraownr

    Cobraownr Formula Junior
    Silver Subscribed

    Feb 6, 2008
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    Donald Silawsky
    The article says the motor is a 4-cam, which would also point to the 365 GTC/4. The 365 GTC has a 2-cam motor.
     
  9. miurasv

    miurasv F1 World Champ

    Nov 19, 2008
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    Steven Robertson
    #9 miurasv, Dec 27, 2016
    Last edited: Dec 27, 2016
    I've read about quite a few 365 GTC/4 engines having porous blocks and now this one with a cracked block. I wondered if these block problems are isolated to the 365 GTC/4?
     
  10. TTR

    TTR F1 Veteran
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    #10 TTR, Dec 27, 2016
    Last edited: Dec 27, 2016
    When I was asked for some advise/assistance, C/4 was mentioned.
     
  11. steve meltzer

    steve meltzer Formula 3

    Sep 18, 2004
    1,219
    with Enzo 8995
    The picture of the engine with the heads off, clearly shows a 4-cam engine. So it's not a 365 GTC. steve
     
  12. Rifledriver

    Rifledriver Three Time F1 World Champ

    Apr 29, 2004
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    Cowboy Capitol of the World
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    Brian Crall
    These block problems are rod problems. No block can survive a broken rod.
     
  13. miurasv

    miurasv F1 World Champ

    Nov 19, 2008
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    Steven Robertson
    #13 miurasv, Dec 27, 2016
    Last edited: Dec 27, 2016
    You are of course right about the rod problem in this case. I'd read the article when posted and forgotten the cause and not the fault of the block. I have heard of quite a few porous blocks on the 365 GTC/4 though.
     

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