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Technical What does this sound like. Suspension banging noise?

Discussion in 'The Hokey Ass Message Board' started by Elcohaulic, Jul 30, 2019.

  1. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    What does this sound like to you? If I turn right then left, it makes this weird banging sound. It doesn't do it if I jack the car up an inch higher.. When I turn right to the end it makes a very slight click like its catching something then when I turn left it finally pops loose at full left turn.
    The front tires are on greased sheet metal so that's the grinding noise, just listen for the bang sound.
    This el Camino has Howe ball joints in SPC control arms and a Lee 14:1 steering box...

    Thanks, this one has me stumped!

     

    Attached Files:

  2. Sounds like something is in a bind, check to see if the tie rod or drag like is hitting something. HRP
     
  3. Model A Gomez
    Joined: Aug 26, 2006
    Posts: 1,695

    Model A Gomez
    Member

    Kind of sounds like a spring popping to me, but doesn't seem to be moving. Is the spring seated in the cup in the frame, see aftermarket lower a arms and don't know how the bottom of the spring seats.
     
    Elcohaulic and 49ratfink like this.
  4. I’m in agreance with the spring sound

    Seized ball joint or tie rod

    Shock bushing or sway bar bush disappeared and metal on metal contact

    Maybe a control arm bush seized and popping when loaded up on extreme turns ?

    Get someone to turn the wheel and put a mechanics stethoscope on all suspension components
    Should be able to pin point

    Noises when nothing is visibly broken suck to find.
     
    Elcohaulic likes this.

  5. gene-koning
    Joined: Oct 28, 2016
    Posts: 4,074

    gene-koning
    Member

    Looks to me like the idler arm is bouncing when I hear the noise. It looks to lean one way when turned in one direction then shifts to lean the other direction after the noise. Might be tight/binding, or has a bushing issue. Gene
     
    Elcohaulic likes this.
  6. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 12,660

    Johnny Gee
    Member
    from Downey, Ca

    A Body? Check frame just after a-frame for split (torn weld) between both halves.
     
    Elcohaulic likes this.
  7. MAD MIKE
    Joined: Aug 1, 2009
    Posts: 781

    MAD MIKE
    Member
    from 94577

    :36 mark. Upper balljoint and control arm seem to pop a bit.
    Check that the upper control arm studs are properly seated and tightened. Especially if you are still using shims, I've gotten ahead of myself more than once and not fully tightened down the upper studs and wonder why my caster kept changing.
     
    Elcohaulic likes this.
  8. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    Made a better video. I can not figure this one out..

     
  9. F&J
    Joined: Apr 5, 2007
    Posts: 13,222

    F&J
    Member

    Get a helper to steer it..Easy way to track where the noise is coming from is by getting under there and put your hand or fingers on each part. Keep trying more parts until you feel it the most.
     
    X-cpe likes this.
  10. shivasdad
    Joined: May 27, 2007
    Posts: 584

    shivasdad
    ALLIANCE MEMBER
    from Texas

    Sounds more like sheetmetal popping to me, but deep. How about the dust shields? Catching on something and unloading at the other end?

    When you say it goes away when you jack it up lends credence that it's something in the frame area, you're changing the loads and where the stress unloads.
     
  11. Definitely need a helper to steer while you (it is your car..) do the dirty look to feel and listen. Put a hand on each component to narrow down the source. Use a wooden dowel to listen once you get close.
     
  12. 52HardTop
    Joined: Jun 21, 2007
    Posts: 1,080

    52HardTop
    Member

    What is that hose on the drivers side of the engine? It seems to jerk every time you hear the noise.
     
    1946caddy likes this.
  13. Yeah that hose jumping it's pretty weird.
     
  14. F-ONE
    Joined: Mar 27, 2008
    Posts: 3,271

    F-ONE
    Member
    from Alabama

    Mmmmmmmn.

    Yeah that hose is jumping....maybe from metal popping on or close to it.

    This makes me think of my 72 Monte Carlo. The drivers lower A frame broke loose from the frame as I was slowly going down my parents drive. I put the brakes on and I was looking at the top hat hub cap. The the drivers wheel swung out at a 90 out of the wheel well.

    I was just going down the drive way I can't imagine if that happened at Hiway speed.
     
  15. Doublepumper
    Joined: Jun 26, 2016
    Posts: 1,546

    Doublepumper
    Member
    from WA-OR, USA

    Brake hoses pulling on the hard line at the frame anchors. Fitting is snapping inside of each anchor when wheels are near full lock? Just trying to think of something that's not obvious....that's usually how it is for me...:confused:
     
  16. MAD MIKE
    Joined: Aug 1, 2009
    Posts: 781

    MAD MIKE
    Member
    from 94577

    Secure the PS hose properly, moving around like that it will eventually abraid and leak. It looks like it is riding the center-link already.
    The popping occurs at full lock. With a PS vehicle when at full lock the maximum pressure is applied. This is often accompanied by the PS pump pressure relief valve dumping, the common 'pshhhhhhhht' on Saginaw pumps, or the much more audible 'MURR-NA-NA-NA-NA' heard from the plastic Ford pumps when you have the wheel turned but then turn it further. You are not actually adding more steering input to the wheels, what is occurring is the torsion bar inside the steering box is at its max rotation and this allows for all the pump pressure to go to the steering box. So you get that full pressure boost and the hose 'pops' from the pressure increase.

    If you haven't already, apply a dab of grease to the knuckles lock stop where it contacts the control arm turning lock. Normally it just makes a click sound when contacting dry, but with the aftermarket control arms rather than a click/thunk sound of a stamped steel arm the tubular arms might be making a louder bang, especially with solid bearings over rubber/poly bushes. Combined with the pressure boost at full lock the steering might just snap that last bit and cause the knuckle to smack the stop.

    I would also 'nut and bolt'(recheck torque values/verify no loose components) the whole front suspension again. Fasteners can back out and cause slop in the system, especially when bushings are replaced by bearings. If you are reusing the factory spline upper control arm to upper control arm shaft bolts, make sure they are fully seated and are not interfering with the upper shafts. I had some Global West shafts not play well with the factory bolts OD as the shafts bolt hole ID was very close and without shims the shaft would not seat on the frame properly.
     
    alanp561, kadillackid and 61Cruiser like this.
  17. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    Turns out it was the fenders. I sprayed the inner fenders down with WD-40 all the bolts connections and everything on both sides of the inner and outer fenders and the popping noise went away.
    The frame must be moving up and down stretching and compressing the body parts. I have new control arms that take the Castor up to 8 degrees positive. It really moves the frame rails up and down when I turn. I'm going to have to find some way to brace them.
     
    Last edited: Aug 3, 2019
  18. Glad you found it.


    5651D338-747A-4FDE-9717-12DA2C2BF479.gif

    Here’s a beer and some melon for your efforts.
     
    Elcohaulic likes this.
  19. shivasdad
    Joined: May 27, 2007
    Posts: 584

    shivasdad
    ALLIANCE MEMBER
    from Texas

    Sheet metal popping for the win!
     
    Elcohaulic likes this.
  20. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    I think it has something to do with the after market control arms. I think I'm going to move the upper control arm brackets back 2" and put the factory upper and lower control arms back on. Moving the upper control brackets back will give me positive caster without having to twist the upper control arms with massive amounts of shims.. In 1964 these cars came with negative caster for easy steering I guess..
     
  21. It sure didn’t sound like fenders
     
  22. Johnny Gee
    Joined: Dec 3, 2009
    Posts: 12,660

    Johnny Gee
    Member
    from Downey, Ca

    Two inches!? That'll make a lot of caster. Time to put pencil to paper.
     
    Elcohaulic likes this.
  23. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    You are right! Turns out its like 3/4" of an inch..lol
     
  24. Elcohaulic
    Joined: Dec 27, 2017
    Posts: 2,213

    Elcohaulic

    Here are some picts of inside the springs. The noise is back but not as loud.. I changed the sway bar with a Hellwig, made no difference.. Here are photos of the inside the spring..

    I'm thinking I have a slightly cracked front spring..

    Right inner front spring.JPG
     

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