News

3084v half-shafts --cant get them off

Discussion in 'Technical Q&A' started by atlantaman, Apr 19, 2004.

  1. atlantaman

    atlantaman Formula 3

    Mar 31, 2002
    1,726
    Roswell, Georgia
    Full Name:
    Charles
    I have been trying to remove the 1/2 shafts on a friends 308 and the danm allen bolts are frozen bad--I was actually under the car lushing on them with a 1 ft extension in the 8mm allen wrench--the wrench was starting to bend!!!!

    On my car i got them off easily---

    Anyone ever had to CUT the nuts off of the bolts??? a 4 hour job is about to turn into a 12 hour marathon.......
     
  2. To remove this ad click here.

  3. abarthracer

    abarthracer Formula Junior

    Dec 6, 2003
    373
    Falmouth, Cape Cod
    Full Name:
    david S.
    I am just about to reinstall mine on my Mondial, same as yours. The bolts were very tight. They actually sparked when they came loose. Make sure you use a quality, snapon/mac allen head. On one shaft, the Mac allen lasted for 10 bolts and 45min. THe last two took 2 inferior allens and 2hours. I did have to cut one nut off with a Dremel tool. Went pretty easy. You will have to get new nuts/bolts from the dealer. ABout $7 each. Go easy and have lots of cut off wheels for your dremel.
    David
     
  4. pma1010

    pma1010 F1 Rookie

    Jul 21, 2002
    2,559
    Chicago
    Full Name:
    Philip
    I use a good quality 3/8 allen drive socket, a 1/2 - 3/8 reducer and my torque wrench (longest/highest leverage) after a few dosings with PB Blaster. They will come, but yes, can be a challenge. Lots of skinned knuckles on this particular job if I recall.

    There's a reason why servicing costs on 308s are so high. (Packaging).
    Good luck.
     
  5. Verell

    Verell F1 Veteran
    Consultant Owner

    May 5, 2001
    7,000
    Groton, MA
    Full Name:
    Verell Boaen
    I used a Craftsman allen 3/8" drive with my butterfly air wrench. Soaked both the head & ends of the threads them for a couple of days with PB Blaster 2x/day first. Think I may have had to use a 3/8" breaker bar on a couple of them.

    They were really torqued down. Not sure if they'd have broken loose w/o pre-soaking with the PB Blaster penetrant.

    BTW, my car is very clean in general, so they weren't rusted, just really tight.
     
  6. tbakowsky

    tbakowsky F1 World Champ
    Professional Ferrari Technician Consultant

    Sep 18, 2002
    15,384
    The Cold North
    Full Name:
    Tom
    Try this: put the wheels back on the car and tighten them down. With your rachet or breaker bar braced agianst the frame , grab a hold of the wheel with both hands and turn it in the appropriate direction. 9 times out of ten they will break free with this method. If not a little bit of heat on your nuts also works. You don't need too much, no need to get them cherry red.

    Tom
     
  7. To remove this ad click here.

  8. henryk

    henryk Formula Junior

    Dec 9, 2003
    479
    Door County, WI
    I have found that a heavy-duty impact wrench (1/2 inch) works the best...........after soaking for a while in the Blaster. The quick on-off power of the impact wrench seems to work better than the steady pull of a breaker bar.........for me, anyway.
     
  9. fatbillybob

    fatbillybob F1 World Champ
    Consultant Owner

    Aug 10, 2002
    19,993
    socal
    I have done this too many times. They always come off no problem with an impact wrench. You can't work of 4re's without one. Allternatively spray wd40 on nut and heat with torch. Then it will come off guarnateed
     
  10. atlantaman

    atlantaman Formula 3

    Mar 31, 2002
    1,726
    Roswell, Georgia
    Full Name:
    Charles
    1/2" impact did nothing---these are in bad shape---will soak them for a bit and try again--also some already appear to be stripped so replacement of a few is definately in order
     
  11. fatbillybob

    fatbillybob F1 World Champ
    Consultant Owner

    Aug 10, 2002
    19,993
    socal
    1) do you have a good impact gun?
    2) don't soak.
    3) wd4- torch to draw into nut impact off
    4) strip hex head then slot with a diegrinder and impact screw driver off
    5) heat nut with torch air cool to anneal. cold chisel nut to split it and air tool it off.
     
  12. To remove this ad click here.

  13. Philjay50

    Philjay50 Formula Junior

    Jan 16, 2003
    594
    Chester, England
    Full Name:
    Philip
    I did the shafts on my 84 Mondial recently, as it happened I did not have much trouble getting the things undone but a specialist advised me to use a cold chisel on the nuts if they would not move.
    I think if the problem persists I would cut them off.
     
  14. 348 Turbo

    348 Turbo Formula 3

    Jul 17, 2002
    1,837
    been there, done this. On my old 308 they were TIGHT!
    I used a long extension and a LONG breaker bar, (about 5 feet!). The POP noise was UGLY, when each came off. I actually BROKE a few of the hardened bolts! I also had to CUT three of them off with dremel tool. I also destroyed a husky socket, use a snap-on or craftsman.
    Listen, plan on buying NEW bolts and nuts anyway. Just BREAK them loose or cut them off. Then replace them with new ones.
    This will work.
     
  15. atlantaman

    atlantaman Formula 3

    Mar 31, 2002
    1,726
    Roswell, Georgia
    Full Name:
    Charles
    when I reinstalled the ones on my car recently i coated them liberally with antiseize--thru drilled the boltheads and safety-wired them all after reassembly

    next time i need to remove them i do not want to have to cut anything
     

Share This Page