Timing Chain Noise - what does bad sound like? | FerrariChat
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Timing Chain Noise - what does bad sound like?

Discussion in '365 GT4 2+2/400/412' started by Joe Bergmann, May 29, 2007.

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  1. Joe Bergmann

    Joe Bergmann Karting

    Oct 24, 2005
    50
    Shoreview, Minnesota
    Full Name:
    Joe Bergmann
    #1 Joe Bergmann, May 29, 2007
    I'm going through my 100,000 km service and am on the timing chain check. I'm just not sure what bad sounds like! I can hear the chain running inside there, kind of a whrrrr sound that alters in pitch with engine rpms. I don't hear any rattling or anything. My tensioner has just over 5mm left on it so I'm guessing I'm close to the limit... Any help would be appreciated!
     
  2. blkprlz

    blkprlz Formula 3

    Mar 24, 2007
    2,169
    Tampa bay
    Full Name:
    Bruce
    #2 blkprlz, May 30, 2007
    Owners manual reflects timing chain tensioning every 20km, doesn't mention replacement interval however. They aren't death defying! Service manuals instruct to increase tension until a slight sound is heard in the timing chest, then backing off until sound disappears. Tensioner adjusting assy. located on drivers side of timing chest/down low. Try backing it off.

    My guess is you might get more response by filling out your profile.
    Any info you care to share with us @ your 365gt or 400 or 400i or 412(serial#, color in/out, auto or gt, any nuances, etc.)?
     
  3. b3tech

    b3tech Karting

    Apr 17, 2007
    100
    Los Gatos CA
    Full Name:
    Boyd Bowdish
    #3 b3tech, Jun 25, 2007
    contact me if you need replacement tensioners. I developed re[lacement materials and process when I rebuilt my 365 GT/4. I will never re[;ace the tesioners again.
    [email protected]
     

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