How do these A-arm bushings look to you? | FerrariChat

How do these A-arm bushings look to you?

Discussion in 'Technical Q&A' started by christopher, May 24, 2009.

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  1. christopher

    christopher Formula 3

    Nov 29, 2003
    1,136
    Ontario California
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    Christopher
    #1 christopher, May 24, 2009
    Last edited by a moderator: Sep 7, 2017
    Hey Guys,


    I actually posted a thread a while ago asking for advice on whether or not I should replace them. I though since I was installing the new shocks, I’d pull one of the A-arms and snap a picture of the bushings for review.

    I know that replacing A-arm bushings is a P.I.T.A., especially given the fact that I’ll possibly be moving a really can’t afford to have the car where it won’t roll on to a tow truck. If I were going to install new ones, I’d probably go with the method of Birdman’s on the polyurethane procedure.

    Anyway,

    Back to my question, I only see where the edges are cracked, the inner portions seem tight, but how do these look to you?

    Thanks Guys,

    Chris.
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  2. 2NA

    2NA F1 World Champ
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    #2 2NA, May 24, 2009
    Last edited: May 24, 2009
    Pretty hard to make a conclusive evaluation from your photos alone. They do however look like ancient, original bushings. The rubber has probably broken down significantly from both age and use.

    While it does require a press and a few special pieces (tools that I have) to do the job right, I wouldn't put it back together without new rubber.

    If you are indeed moving soon and are unprepared for the job, I suppose that reassembly is better than trying to move a basket case.
     
  3. jimshadow

    jimshadow F1 Veteran
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    Feb 19, 2006
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    Those cracks look deep and the rubber looks dried out from what I can tell in the pics. Do they lean to a side? (Take a pic straight at the hole in the bushing)

    It is very easy to replace these. The hardest part is getting the old rubber out. You'll need at the very minimum a 6 ton press. A 12 ton is easier to work with because you'll have all the clearance you will need. (Find a friend with one.)
    Search the archives for Birdman's thread as well as mine on replacing these. It's a weekend project. :)

    JIM
     
  4. beast

    beast F1 World Champ

    May 31, 2003
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    They are defiantly cracked and due for replacement.
     
  5. rizzo308

    rizzo308 F1 Rookie
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    #5 rizzo308, May 24, 2009
    Last edited: May 24, 2009
    by the looks of middle/bottm pic chunk of rubber missing i would ditch them fit new rubbers mate for sure...... also would ditch that camera good luck
     
  6. Corsa308

    Corsa308 Formula Junior

    Apr 22, 2007
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    Steve D
    They look absolutely shot!
    They need replacing. It is an easy job. If you have the time and patience, strip back the wishbones and do a full job on them.
    Also, you have to find the "Macro" switch on your camera.

    Steve
     
  7. christopher

    christopher Formula 3

    Nov 29, 2003
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    Appreciate your replies.

    While I was R&R-ing the shocks, I though I'd ask the question. The only good part of the bushings, is that they're still tight and don't move. They look like hell but don't move. This project might have to wait until I move. For right now, I'll just do a patch job to get the car on the tow truck and work on it when I have more time.

    Thanks for your advice Guys!

    Regards,

    Chris.
     
  8. tomoshea

    tomoshea Formula Junior

    Dec 29, 2003
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    I would caution all the views that they are shot.... you can get this effect on the exposed ends of the bushes while the rubber between the inner and outer metal is actually fine.

    And unless you plan on tracking the car/ racing the car they will be Ok for day to day use around town/ regular spirited driving.

    The best test is to put a long bolt through the hole and apply up/ down force at 0, 90,180 and 270 degrees to see what level of movement you get at each end of the metal tube, if minimal then the rubber is probably fine within the bushing, if you get movement or metal to metal then they need replacing.

    Tom
     
  9. miketuason

    miketuason F1 World Champ
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    +1 Mine looks the same but my car handles superbly, no play, and no noise.
    It's the inside that counts.
     
  10. f308jack

    f308jack F1 Rookie

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  11. christopher

    christopher Formula 3

    Nov 29, 2003
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    Christopher
    Thanks Guys,

    Based on the others' views, I was going to replace them at my leisure. I might want to take a second look at doing so. If the ends are deteriorated, it's only due to time, not miles as the car only has 17,366 miles on it. I'll perform the tests as you have mentioned, if there's no movement, I might forgo the replacement.

    Incidentally, the front A-arm bushings are the only ones that consist of rubber, aren't they? The rears shouldn't need replacement. It's been a while since I looked.

    Thanks again Guys,

    Chris.
     
  12. fastradio

    fastradio F1 Rookie
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    Apr 26, 2006
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    Chris,

    Although this may be music to your ears, I'd consider the reasoning behind the music as mildly flawed. These rubber bushings are now 30 years old....and deteriorate from time just as easily as they do from mileage. The same logic can be applied to any rubber-based product; just because it looks OK, doesn't mean that it is. Case in point: Tires, fuel lines and coolant hoses. In my experiences, now going on 30 years with Ferrari, the bushings have a "safe" serviceable life of about 10-15 years, maximum. Sure, they can be challenging, at times to replace them....but that "aggrevation" should never be a factor in determining the overall saftey of the vehicle.

    Also, your car does have rubber-based suspension bushings in the rear, as well. These are used (only) on the "inners" of both the upper and lower control arms, where they attach to the chassis.

    FWIW, the rubber that you see cracked and dry rooted is, "in essence" the thrust surface of the bushing. This comes into play when you load the suspension under braking or hard cornering....and helps in keeping the alignment where is should be statically. Loading these bushings "by hand" will not reveal the true looseness/slop than can be only simulated by the vehicle mass under actual load conditions.

    In my opinion, all of the rubber in the car is long overdue for replacment...

    Of course, opinions will vary.

    Regards,
    David
     
  13. christopher

    christopher Formula 3

    Nov 29, 2003
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    Christopher
    I very much appreciate you detailed reply. Just when I though I had my mind made up.....lol.

    Thanks again, you made some very good points.

    Regards,

    Chris.
     

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