Valve Clearances | FerrariChat

Valve Clearances

Discussion in '365 GT4 2+2/400/412' started by wda24729, Dec 1, 2017.

This site may earn a commission from merchant affiliate links, including eBay, Amazon, Skimlinks, and others.

  1. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #1 wda24729, Dec 1, 2017
    Good evening. Ive researched the required valve clearances at 2-2.5 for inlet and 3-3.5 for exhaust however all of mine are largely consistent at 1.5 for inlet and 2.5 for exhaust.

    Are the early carbed cars any different, as these reading seem a little tight?

    Regards
     
  2. samsaprunoff

    samsaprunoff F1 Rookie
    Silver Subscribed

    Jun 8, 2004
    4,178
    Edmonton, AB Canada
    Full Name:
    Sam Saprunoff
    #2 samsaprunoff, Dec 1, 2017
    Good day wda24729,

    Looking at both owner's manuals for the 400GT and the 365GT4 2+2, both show the same values:

    0.10 mm to 0.15 mm (0.004" to 0.006") Intake
    0.25 mm to 0.30 mm (0.010" to 0.012") Exhaust

    I have attached screen shots of the relevant owner's manual pages.

    If anything I would err to the "loose" side rather than "too tight".

    Looking at your measurements (I think your decimal point is in the wrong place :) ) the intake is at the upper limit and the exhaust on the lower limit.

    Cheers,

    Sam

    Image Unavailable, Please Login Image Unavailable, Please Login
     
  3. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #3 wda24729, Dec 1, 2017
    Thanks Sam, that makes alot more sense, and yes sorry decimal point in the wrong place! :(

    I only have the 400i workshop manual which specifies the figures I identified above. I don't have the 400GT version, lucky I asked :)
     
  4. Arvid

    Arvid Formula Junior

    May 28, 2012
    668
    Norway
    Full Name:
    Arvid Andersson
    #4 Arvid, Dec 1, 2017
    You are correct,the 400GT and the 400i does not have the same measured valve clearance - although the opposite is often believed.

    400GT = inlet 0.10-0.15 / exhaust 0.25-0.30
    400i = inlet 0.20-0.25 / exhaust 0.30-0.35

    365GT4 2+2 have the same values as 400GT
     
  5. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #5 wda24729, Dec 1, 2017
    Looks like I'm okay then, thanks for your help.

    Don't suppose anyone has a copy of the 400GT WMN they might be willing to supply? :)
     
  6. Arvid

    Arvid Formula Junior

    May 28, 2012
    668
    Norway
    Full Name:
    Arvid Andersson
    #6 Arvid, Dec 1, 2017
    I was told there are no WSM for the 400GT.
     
  7. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #7 wda24729, Dec 1, 2017
    365?
     
  8. Ak Jim

    Ak Jim F1 Veteran
    Owner Rossa Subscribed

    Dec 23, 2007
    8,486
    North Pole AK
    #8 Ak Jim, Dec 1, 2017
    There's no manual for the 365GT4 2+2 either.
     
  9. samsaprunoff

    samsaprunoff F1 Rookie
    Silver Subscribed

    Jun 8, 2004
    4,178
    Edmonton, AB Canada
    Full Name:
    Sam Saprunoff
    #9 samsaprunoff, Dec 1, 2017
    Last edited: Dec 1, 2017
    Indeed, this is true... however, I was told that one could use the Service/Repair Manual for the 365 GTC4 (Ferrari Publication Number 79/73) given the technical similarities between the two models. Angelo Wallace apparently did an English Translation and has an ISBN of 0-9606804-6-2:

    http://www.365gtc4.com/reference/books.aspx

    The only place where I saw the Angelo Wallace version was on Books4Cars:

    https://books4cars.com/listings.php?findmake=Ferrari&model=365&year=1973&type=%

    They list it as $129.95 USD, however, it would be best to check to ensure that they have stock.

    Cheers,

    Sam
     
  10. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #10 wda24729, Dec 2, 2017
    Thanks Sam. As always, very helpful.
     
  11. larryg

    larryg Karting

    Jun 30, 2004
    232
    Louisville, KY
    Full Name:
    Larryg
    #11 larryg, Dec 2, 2017
    I used a combination of manuals from the 365, 400GT, and 400i. I have everything I've collected in a google drive folder, I'll create a new thread with a link to it.
     
  12. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #12 wda24729, Dec 2, 2017
    Well all my clearances are bang on for the GT settings so that a relief. Any further info gratefully appreciated Larry, thanks.
     
  13. larryg

    larryg Karting

    Jun 30, 2004
    232
    Louisville, KY
    Full Name:
    Larryg
    #13 larryg, Dec 2, 2017
    I really don't post as much as I should but you are always welcome to message me. We have been going through all of the systems on the car but not restoration quality, it's going to be a solid driver. I'm currently working on rewiring the engine compartment and hoping to be ready to put the engine back in and get it on the road this spring.


    Sent from my Pixel XL using Tapatalk
     
  14. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #14 wda24729, Dec 3, 2017
    Ah so your also in the 'engine out' club at present. Engine bay is next on the list but not looking too bad and everything electrical works which is a relief. Have to say, although I do like a challenge, this is not one of my more enjoyable restos. What's the saying....one step forward, two steps back.

    One thing I will contact you about later is torque settings other than the few that are supplied in the WSM.
     
  15. larryg

    larryg Karting

    Jun 30, 2004
    232
    Louisville, KY
    Full Name:
    Larryg
    #15 larryg, Dec 3, 2017
    Ironically, most of the electrical equipment "works", but some of it has been hacked together. Between that and the brittle wires, we figured it would be another worthy "while you're at it". Keep in mind everything rubber on a 40 year old car probably needs to be replaced. I was amazed it hadn't gone up in flames between the cracked wiring and fuel lines.
     
  16. wda24729

    wda24729 Formula 3

    Sep 22, 2014
    1,000
    Devon, UK
    Full Name:
    Graham
    #16 wda24729, Dec 3, 2017
    Mines not too bad actually, just those stupid exposed braided earth wires.
     

Share This Page