Air Injection check valve removal??? | FerrariChat
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Air Injection check valve removal???

Discussion in '308/328' started by cmt6891, Jul 6, 2010.

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  1. cmt6891

    cmt6891 Formula 3

    Feb 25, 2008
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    Carl T
    #1 cmt6891, Jul 6, 2010
    So I need to change my forward bank (facing front of car) air injection check valve and it is frozen in place. I have treated it with PB Blaster in hope of loosening it up but no joy. I assume it removes in a counter clockwise motion?? Am I tightening versus loosening??

    Any ideas or tips on cracking the nut would be appreciated!
     
  2. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #2 Steve Magnusson, Jul 6, 2010
    Yes, it is a "normal" (right hand) thread. Be sure to use a wrench on the air manifold side to resist the torque -- you don't want to break the air manifold.
     
  3. 350HPMondial

    350HPMondial F1 Veteran
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    Edwardo
    #3 350HPMondial, Jul 6, 2010
    It's a pipe thread,, Right hand,
    check valves are from MOPAR,, 1988 Jeep Grand Cherokee V8..

    Good luck,
    Edwardo

    (None of those are on my Euro car....)
    :)
     
  4. cmt6891

    cmt6891 Formula 3

    Feb 25, 2008
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    #4 cmt6891, Jul 6, 2010
    Thanks for the quick replies. Yeah I assummed right hand thread just making sure. Did the double wrench technique but from the top with no success limited space for leverage. I guess the next attempt will be from underneath the engine.
     
  5. Rifledriver

    Rifledriver Three Time F1 World Champ

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    #5 Rifledriver, Jul 6, 2010
    Underneath is not easier.


    Remove the hood if you have not already.
     
  6. 2dinos

    2dinos F1 Rookie

    Jan 13, 2007
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    #6 2dinos, Jul 6, 2010
    +1. The hood makes many service efforts much more difficult, if not impossible. I like Liquid Wrench. Be patient! Get your backup wrench carefully positioned. Maybe put some towels, cardboard etc around the bodywork and back glass to protect from inadvertant wrnch contact. If you break the air rail, the job gets a whole lot more fun.
     
  7. bill brooks

    bill brooks F1 Veteran
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    #7 bill brooks, Jul 6, 2010



    well... for once i disagree.

    i got mine loose from below and all i needed was pb blaster, 2 good spanners,
    and the lord's name in vain. (only twice)
     
  8. phrogs

    phrogs F1 Veteran
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    #8 phrogs, Jul 6, 2010
    mine had to be drilled out.
     
  9. mwr4440

    mwr4440 Five Time F1 World Champ
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    #9 mwr4440, Jul 7, 2010
    Im lost.

    What Part # on which TAV from the Parts Manual is this?
     
  10. moysiuan

    moysiuan F1 Rookie
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    #10 moysiuan, Jul 7, 2010
    I was really worried about breaking the air manifold, there is alot of corrosion potential from the exhasut gases in there, over many years, mine was the 21 year old original item (and one failed from corrosion). Rather than take chances when it was clear that with two wrenches alot of pressure was needed, I dremel tooled a slit in the side over the threaded area, and put on penetrating oil. It then came off without much risk of damage. A little score left on the treads, but nothing serious. Put anitseeze compound on the new one.
     
  11. Steve Magnusson

    Steve Magnusson Two Time F1 World Champ
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    #11 Steve Magnusson, Jul 7, 2010
    Last edited: Jul 7, 2010
    It's not shown in the available online (euro) 308 SPCs at the parts suppliers because it is for a US version only. If you look on TAV 9 in the 161/78 US 308GTB/S SPC (that you can get online from http://ferrari.cdyn.com) they are items 27, or, if you look in the online non-abs 328 SPC, they are shown on TAV 9, items 3.
     

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