F355. Spark plug exchange. | FerrariChat
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F355. Spark plug exchange.

Discussion in '348/355' started by Klas, Mar 27, 2015.

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  1. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
    Gothenburg, Sweden
    Full Name:
    Klas Nilsson
    #1 Klas, Mar 27, 2015
    Is it complicated to exchange the spark plugs on a F355 MY97 (M5.2)? It seems that I need to remove the red valve covers and especially the one right hand is not easy to reach.
     
  2. 2NA

    2NA F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 29, 2006
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    Tim Keseluk
    #2 2NA, Mar 27, 2015
    It really doesn't get much easier on a Ferrari. The spark plugs are under the narrow cover with "Ferrari" embossed on it. It will require an allen wrench to remove. The spark plugs require a 5/8" socket.

    Don't drop anything down the holes.
     
  3. Shootfighter65

    Shootfighter65 Formula 3

    May 13, 2014
    1,372
    Charleston SC
    Full Name:
    Randy..alluneedtokno
    #3 Shootfighter65, Mar 27, 2015
    should you use only a new gasket when reinstalling them or gasket plus a sealer..when you reinstall them tighten in a X pattern starting from the inside out
     
  4. 2NA

    2NA F1 World Champ
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    Tim Keseluk
    #4 2NA, Mar 27, 2015
    I wouldn't worry too much about the gasket. It's only purpose is to keep rain out of the spark plug holes. You can likely use the same one again.
     
  5. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
    Gothenburg, Sweden
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    Klas Nilsson
    #5 Klas, Mar 27, 2015
    Went out to the garage after I started this thread. It does look quite easy, so I'll give it a try, as my engine seems not to run properly on one cylinder. Don't know which. Might be just a spark plug if I am lucky...
     
  6. 2NA

    2NA F1 World Champ
    Consultant Owner Professional Ferrari Technician

    Dec 29, 2006
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    Tim Keseluk
    #6 2NA, Mar 27, 2015
    If you have an ohmeter, check the resistance of the wires. It's an easy job while you're in there. They have built-in resistors and should test in the neighborhood of 5K ohms. If you have infinity on one, that could also be your problem.
     
  7. Loser

    Loser Formula Junior

    Apr 11, 2008
    791
    Gilroy, CA
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    Tom
    #7 Loser, Mar 27, 2015
    Check the coils also. Pull the plug wires off and the ECU wire, then measure around 13.7K between the top and bottom plug wire posts on each side. Then measure about 0.5 ohms between the ECU center conductor and each of the ECU edge conductors.
     
  8. f355spider

    f355spider F1 World Champ
    Owner Rossa Subscribed

    May 29, 2001
    18,053
    USA
    #8 f355spider, Mar 27, 2015
    Current recommendation from Ferrari is to use the NGK PMR8B.
     
  9. Rice-Racer

    Rice-Racer Formula Junior

    Jan 10, 2015
    252
    #9 Rice-Racer, Mar 27, 2015
    Agree, that's what Ferrari put in my '97 before I bought it, runs fine.
     
  10. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
    Gothenburg, Sweden
    Full Name:
    Klas Nilsson
    #10 Klas, Mar 28, 2015
    In the manual it says PMR7A
     
  11. Klas

    Klas Formula Junior

    Mar 17, 2014
    364
    Gothenburg, Sweden
    Full Name:
    Klas Nilsson
    #11 Klas, Mar 29, 2015
    It was very easy to exchange the spark plugs. :)
     

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