exhaust manifold bolt torque spec??? | FerrariChat
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exhaust manifold bolt torque spec???

Discussion in '308/328' started by chairpilot, Jul 19, 2008.

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  1. chairpilot

    chairpilot Formula 3

    Mar 3, 2007
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    #1 chairpilot, Jul 19, 2008
    Last edited: Jul 19, 2008
    I've spent about 1 hour now searching on google and Fchat trying to locate an exact spec on what to torque down a loose exhaust manifold nut to, on my 308 QV, with no luck. I must be missing something in my efforts. I did find this generic chart from an old post:

    http://www.ferrari101.com/forum/showthread.php?t=48595&highlight=bolt+torque+values

    Is this the best I can do? The 308 shop manual .pdf file (I have) does not list the exhaust manifold (???)

    Any assist would be appreciated. I want to drive this car tomorrow!!!!!!!!!

    bob R.
     
  2. miketuason

    miketuason F1 World Champ
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    #2 miketuason, Jul 19, 2008
    Hi Bob, according to Guisepe (my Boss) it's around 13 to 15 ft. lbs
     
  3. Pizzaman Chris

    Pizzaman Chris F1 Rookie

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    #3 Pizzaman Chris, Jul 19, 2008
    Boss?? You?? I thought you just freelance. ;)
     
  4. chairpilot

    chairpilot Formula 3

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    #4 chairpilot, Jul 19, 2008
    Thanks Mike!

    Hey, when is your car going to be down here?
     
  5. miketuason

    miketuason F1 World Champ
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    #5 miketuason, Jul 19, 2008
    Preety soon Bob, still recooperetaing a little bit from my vacation:)
     
  6. Darolls

    Darolls F1 Veteran
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    #6 Darolls, Jul 19, 2008
    Don't think I've ever seen anyone use a torque wrench on an exhaust manifold; just torque it till it's tight.

    If it leaks, try tightening the bolts/nuts a little more.
     
  7. mike996

    mike996 F1 Veteran

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    #7 mike996, Jul 20, 2008
    I'd suggest being really careful tightening bolts into aluminum or nuts on studs in AL. It's really easy to strip out AL threads until you have a lot of experience with AL. A torque wrench is the safest. "Hand tight" with steel bolts into cast iron is "stripped" with AL. Fortunately, that's why God had someone invent helicoils! True, once you have experience, you can feel the proper tightness of a fastener into any common car material. But it takes time and a lot of car work to develop that!

    Of course, I may be saying that to folks here who have that level of experience. If so, I apologize - I have never turned a single nut/bolt on a Ferrari but I've worked on more AL heads and other AL engine components on auto, boat, and aircraft engines than I care to remember. My actual Ferrari experience will start in about a month when I pick up my "new" 328.
     

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