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#1 |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Funky clunk sound driving me absolutely insane!
Been hearing a clunk sound on the passenger side of my 72 K1500. Jacked it up and found the ball joints were bad, just got done replacing them, went for a test drive and the clunk sound is still there! Had a friend with me and he can feel it on the floor board board on the passenger side. This happens mostly as I go around a corner. Checked all the tie rod ends, body mounts, recently installed new urethane bushings in the leaf springs, I can't find any source for this sound.
I did notice the front spring perch on drivers side moves a little when I turn the steering wheel, seems two of the rivets are worn, I can wiggle them with my fingers. I'm curious what I can do to fix that? Can I weld the rivets in? I doubt seriously it's the source of noise on the passenger side but I need to fix it anyway. I am completely out of ideas as to the source of that damn clunk on the passenger side! Any ideas?
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#2 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,232
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Re: Funky clunk sound driving me absolutely insane!
Aaron how about shock mounts, cab and radiator support mounts, bumper bolts to frame? It is normal for the leaf spring mounts to move a little bit when turning. Possible cracks in the frame through the steering sector bolt holes?
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#3 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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#4 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,232
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Re: Funky clunk sound driving me absolutely insane!
It only takes a minute amount of movement for heavy metal to make a strong noise transferred through the vehicle. Engine mounts, crossmembers are suspect.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#5 |
laying low
![]() Join Date: Mar 2001
Location: Searcy, Ark. USA
Posts: 13,232
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Re: Funky clunk sound driving me absolutely insane!
Good point Joe. I have had calipers that didn't fit snug in the bracket and made a hard bump/clunk noise. The bracket may be worn instead of the caliper.
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Boog 69 Chevy stepside, 358/T350, 4.11 posi, 4.5/4 drop, rallys, poboy driver primer is finer 91 Chevy sportside, Tahoe, Yukon & GMC Crewcab All GM..'nuff said. I stand for the flag and kneel at the cross |
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#6 |
Registered User
Join Date: Apr 2013
Location: South Westerlo, New York
Posts: 1,325
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Re: Funky clunk sound driving me absolutely insane!
If you have disc brakes check the grommets that go on the bolts that hold the calipers to the caliper frame. when they wear out they make a terrible noise like the front end is falling off.
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Thanks, Joe.. 1969 C/10, 348 C.I., 3X2 bbl. V8, 2004r , LWB. |
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#7 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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#8 |
Old Duffer
![]() Join Date: Mar 2003
Location: Maine
Posts: 1,821
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Re: Funky clunk sound driving me absolutely insane!
My vote goes to the right engine mount...........
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'68 Short C20 Flatbed Dually w/ 292 4bbl, Langdon cast headers, and WC T5 trans. '81 G10 Shorty Van "Good judgement comes from experience, and a lot of that comes from bad judgement." Will Rogers "Under promise, then over achieve." |
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#9 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,526
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Re: Funky clunk sound driving me absolutely insane!
upper shock mount bolt loose
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#10 |
Registered User
![]() Join Date: May 2013
Location: WEST PALM FLORIDA
Posts: 1,174
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Re: Funky clunk sound driving me absolutely insane!
first guess control arm bushings
second guess ball joints third sway bar bushings - if it has one you can weld the perch , crossmember or trany mont may be lose also
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68 Long Fleet , ly6 , turbo 350 , 3-5 drop , original paint , front discs 67 Small window , 7 foot bed , tweaked 6.0 LSX 2004R Medium Olive 58 Apache fleet , 235 , offy intake , dual exhaust , 4 on the floor , red/white 69 Long Fleet , Custom , 6.0, 4l60 , AC , Medium Olive |
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#11 |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Re: Funky clunk sound driving me absolutely insane!
Thanks all, I'll crawl around under that sucker tomorrow with a few extra ideas. I did notice a little while ago my right exhaust manifold is only about 1/4" from the frame while the left is about 5/8" above the frame. Motor mounts are new so I'm going loosen them up and see how much I can twist the engine to even it out. I can't tell if it's hitting the frame but it's close enough to be suspect.
Thanks for the ideas, I'll double check it all tomorrow.
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#12 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,526
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Re: Funky clunk sound driving me absolutely insane!
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#13 | |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
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Re: Funky clunk sound driving me absolutely insane!
Quote:
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#14 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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#15 |
Senior Member
![]() Join Date: Nov 2001
Location: Rapid City, SD
Posts: 2,281
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Re: Funky clunk sound driving me absolutely insane!
***Edit*** I just reread this post and noticed its a 4x4, so disregard my suggestion below.
How is your truck lowered? If is is lowered... I had a set of cut front coils in an old 67 years ago. they were not cut in the right location to line up with the pocket in the lower control arm. So, every time I turned the wheel past a certain point, the coil would thunk into place on the control arm. It was very noticeable and irritating.
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My Trucks: 1967 Chevrolet Short Wide Box 327 TH350 9" w/3.90 gears paint will be White - Current Project 1967 Chevrolet Custom LWB 283 TH400 3.73 Posi, no-AC, no-PS, no-PB, bench-seat, small-window - mostly orig driver 1967 Chevrolet CST LWB originally a 327 TH400 3.73 Posi AC PS PB, had Buddy Buckets, Small Window - parts truck 1967 Chevrolet CST LWB, 283 MT 3.73 had Buddy Buckets, Panoramic Window - parts truck 2001 Chevrolet 3500 2WD Crew Cab Dually 8.1L Allison White Last edited by 67 cst swb; 05-19-2017 at 09:54 PM. |
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#16 |
Registered User
![]() Join Date: Jul 2015
Location: 2nd left past the stump on a dirt road.
Posts: 2,629
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Re: Funky clunk sound driving me absolutely insane!
Check the bed bolts, I found a few making and extreme amount of ruckus. These frames do flex quite a bit.
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#17 |
Senior Member
![]() Join Date: Mar 2013
Location: Dallas NC
Posts: 587
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Re: Funky clunk sound driving me absolutely insane!
If it still has the transfer case bracket that mounts to the frame the bushings could be worn out making the noise.
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#18 |
Registered User
Join Date: Jul 2011
Location: Mt Brydges Ontario
Posts: 181
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Re: Funky clunk sound driving me absolutely insane!
My vote is a cracked frame behind the steering box. Hope I'm wrong. Good luck.
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#19 |
Registered User
Join Date: Dec 2009
Location: El Dorado Ca
Posts: 3,374
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Re: Funky clunk sound driving me absolutely insane!
I know you said you checked for cracked frame, did you look behind steering box.....?check your steering box for loose bolts.or cracks at the bolt holes for the steering box..kind of stupid questions I am asking, but it is frustrating to me as well not being able to figure it out...
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#20 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Re: Funky clunk sound driving me absolutely insane!
Quote:
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#21 |
Registered User
Join Date: May 2016
Location: Henderson NC
Posts: 975
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Re: Funky clunk sound driving me absolutely insane!
I had the same problem. Mine turned out to the exhaust pipe hitting where it goes under the back of the cab.
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#22 |
Registered User
Join Date: Apr 2016
Location: Portland, Or
Posts: 387
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Re: Funky clunk sound driving me absolutely insane!
You said that you replaced the spring bushings, did you also replace the shackle bushing in the frame?
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#23 |
Registered User
Join Date: Apr 2016
Location: Portland, Or
Posts: 387
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Re: Funky clunk sound driving me absolutely insane!
You said that you replaced the spring bushings, did you also replace the shackle bushing in the frame?
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#24 | |
Registered User
Join Date: Jul 2007
Location: Fall River California
Posts: 2,026
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Quote:
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#25 |
Senior Member
![]() Join Date: Mar 2003
Location: Colfax-California
Posts: 8,526
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Re: Funky clunk sound driving me absolutely insane!
If you grab the front bumper on the pass side and push it up and down can you hear the noise?
Then bounce the suspension by pushing on the fender |
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