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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: JonC] #1915689
09/19/15 03:27 PM
09/19/15 03:27 PM
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RapidRobert Offline
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Originally Posted By JonC
Maybe a dry torsion bar socket?
that's what I was thinkin


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1915692
09/19/15 03:38 PM
09/19/15 03:38 PM
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Little more diagnosing. Hard to do trying to jack it up and feel for the sound at the same time. If I put my hand on the upper control arm I can feel the sound in that part. If I put my hand on the lower one while it makes the sound I don't feel it and just hear it. So it's coming from the upper control arm area. Every time the jack moves up a little it pops. If I let it down real quick it makes several pops as it goes through the motions.


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1915698
09/19/15 03:45 PM
09/19/15 03:45 PM
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Quote:
If I put my hand on the upper control arm I can feel the sound in that part. If I put my hand on the lower one while it makes the sound I don't feel it and just hear it. So it's coming from the upper control arm area.
Hmmm I wonder if the UCA cam bolt nuts were tightened when it was still up in the air (wheels drooping/not loaded)


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: RapidRobert] #1915707
09/19/15 03:57 PM
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I don't know but it's a possibility. How can I fix? How are they supposed to be done what's spec? I checked the right side the same way and it is fine. I know when I got the car the front was about 2 inches or so higher than spec. That's probably why that bump stop got messed up. It's correct height now. It did make the same sound when it was higher as well.


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1915717
09/19/15 04:08 PM
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on the rack (loaded) when they get the cams turned for the correct caster/camber settings then the nut(s) on the end are tightened to clamp it all together. I think you could loosen the nuts then set the car down (loaded) then retighten them but first you'd wanna make a tic mark on the cams and the frame next to them for reference to make SURE they do not rotate during this which would alter the alignment settings. and with the noise coming from the UCA does the UBJ look OK (not loose/no binding/contact as far as you can tell?) EDIT & you might see if anything metallic is loose/appears to be moving/contacting/shifting in that (UCA bushing) area that is generating the noise

Last edited by RapidRobert; 09/19/15 04:14 PM.

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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: RapidRobert] #1915813
09/19/15 07:42 PM
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Which nuts are we talking about? The ones accessible inside the engine bay? The ball joint looks good/new with no movement. Well greased MOOG. Pics a couple posts up show it.

I haven't been able to see anything shift or move. I just hear and feel it, but it is awkward trying to jack and see and feel all at the same time. The noise seems to be coming from both attachment points where the UCA rotates on its axis and I would say both sides of where the left UCA attaches are making about the same noise. When I feel the ball joint doing the same thing I can still feel the noise since it's connected to the UCA and the sound is radiating through it, but the strength and frequency of the feel and sound is less than it is where it pivots.


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1915961
09/20/15 02:14 AM
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Quote:
Which nuts are we talking about?.
The 9/16 (iirc) nut on the end of the integral cam adjuster/bolt that goes thru the (2) UCA bushings on each UCA in the pic. EDIT after a good nights' sleep it hit me that those nuts are 3/4

Last edited by RapidRobert; 09/20/15 02:03 PM. Reason: clarification

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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916153
09/20/15 03:59 PM
09/20/15 03:59 PM
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I get the same noise in my 67 coronet since the resto.. I have never found anything wrong when up on the rack..

My opinion is its the urethane lowers..

Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916262
09/20/15 07:36 PM
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I had a chance to mess with it a little today. In my opinion the bolts were pretty loose so I loosened them a bit more with the suspension unloaded then loaded it and snugged them up. I didn't hear the noise, but I'm not sure it's gone. Crossing my fingers. I would like to torque them to spec but I can't find the specs. Anyone know?


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916275
09/20/15 07:57 PM
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Originally Posted By f2502011
I had a chance to mess with it a little today. In my opinion the bolts were pretty loose so I loosened them a bit more with the suspension unloaded then loaded it and snugged them up. I didn't hear the noise, but I'm not sure it's gone. Crossing my fingers. I would like to torque them to spec but I can't find the specs. Anyone know?


Should be in your shop manual ???

You said the front end was too high and it was lowered , who lowered it and was the front end realigned afterwards ?

I would not have loosened them with the front unloaded then lowered it. When the alignment is done the weight is on the front end the entire time , any adjusment to ride height should be done with all alignment bolts ... especially the pivot shaft bolts ... loose so the bushings are not in a bind.

Someone mentioned poly bushings, does this car have polys ?


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: JohnRR] #1916324
09/20/15 09:20 PM
09/20/15 09:20 PM
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I had a popping noise in the front of my 70 challenger after doing a complete restoration. I have driven it about 1000 miles since finishing it. I too thought it was the upper control arm nuts, also suspected the strut rods, shocks, and lower control arm pivot nuts. Found the problem today! 3 of the 4 K frame attachment bolts were loose! I am sure I tightened them when doing the restoration, but they were very loose. Just my 2cents.
Jess


Yeah, it's hopped up to over 160...
Re: Hollow Popping Noise Left Front When Turning Wheels [Re: JohnRR] #1916354
09/20/15 10:27 PM
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Quote:
You said the front end was too high and it was lowered , who lowered it and was the front end realigned afterwards?
I was wondering about that myself. Right now if your camber & toe in is acceptable then you are OK (for tire wear) if it drives/handles OK even if the caster is off/uneven on both sides. You could level it on tiles with your weight in barbells in the DR seat & string it then check camber with a 2ft carpenters' level vertical on the sidewalls & also the toe in or just have it checked/realigned at the shop if you feel it needs rechecked, what works for you. Holler if the noise stays gone or how it goes


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916362
09/20/15 10:39 PM
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Quote:
In my opinion the bolts were pretty loose
I wonder if that was the cause of the noise (sounds probable if it is quiet now after tightening em). not sure of the spec but those nuts need to be tightened TIGHT with the car loaded, not even sure if you could even get a torque wrench in there


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: JohnRR] #1916365
09/20/15 10:41 PM
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65 ft-lbs maybe? I don't have a shop manual. Only access to one online which is a PITA.

I lowered it. It was not re-aligned. But again it made the same noise before it was lowered to the correct height.

I was following previous advice to let the suspension unload, loosen the nuts, load it up and then re-tighten as maybe they were previously tightened while unloaded.

Not Polys.


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916370
09/20/15 10:44 PM
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1/2" wheel studs are 65 so that would work or close to it. So it is still noisy?


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: RapidRobert] #1916390
09/20/15 11:01 PM
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I haven't been able to reproduce the popping noise doing the same procedure of raising and lowering the control arm with a floor jack after I tightened the nuts to 65 ft/lbs. I haven't driven it yet after doing so though. There were no issues getting a torque wrench in there.


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Re: Hollow Popping Noise Left Front When Turning Wheels [Re: f2502011] #1916932
09/21/15 07:24 PM
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Originally Posted By f2502011
65 ft-lbs maybe? I don't have a shop manual. Only access to one online which is a PITA.

I lowered it. It was not re-aligned. But again it made the same noise before it was lowered to the correct height.

I was following previous advice to let the suspension unload, loosen the nuts, load it up and then re-tighten as maybe they were previously tightened while unloaded.

Not Polys.


take it to get the front end aligned by someone that knows old cars , when you lowered the front suspension you changed the alignment . Tell them to go thru the whole thing as far as loosening and retighten the bolts , BUY A SHOP MANUAL


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