Clunking low speed braking - Miata Turbo Forum - Boost cars, acquire cats.

Welcome to Miataturbo.net   Members
 


Suspension, Brakes, Drivetrain discuss the wondrous effects of boost and your miata...

Reply
 
 
 
LinkBack Thread Tools Search this Thread
Old 10-30-2015, 06:13 PM   #1
Junior Member
Thread Starter
 
Join Date: Oct 2014
Location: USA
Posts: 125
Total Cats: -65
Default Clunking low speed braking

I notice a clunk when braking and at low speed right before coming to a stop. It seems to happen when going nearly 0mph and the car shifts its weight forward a bit right before stopping.

There is a clunk or thud type noise that sounds like it might be coming from the rear of the car.

I had the car up on jack stands when doing a oil change and took off one of the wheels. I should have done both but was lazy or wrongly assumed both sides would wear about the same. I inspected the brakes and everything fine though the hardware clips weren't in place these things never seem to stay in or do their job. and even after putting them back in place the clunk returns. D in picture below.


The bushings all looked fine sway bar fine wheel bearings fine coilover fine I gave it the shade tree mechanic check of the axle shaft and seemed fine.

I came up with no reason it should be clunking everything looked to be in good shape with no slop anywhere.

Only thing I can guess is its the fuel tank issue in this bulletin.
Attached Thumbnails
Clunking low speed braking-80-miata_20brake_20job_20120311_20_9__97d0c96ad6db94f0d5868673d578f17cf3b371ff.jpg  
Attached Files
File Type: pdf 1997-07-16-thumping-or-popping-noise-from-fuel-tank-area.pdf (64.4 KB, 107 views)
Guy Farting is offline   Reply With Quote
Old 10-31-2015, 01:18 AM   #2
Junior Member
iTrader: (1)
 
Join Date: Jan 2012
Posts: 115
Total Cats: 9
Default

One major potential cause is alignment bolts loose/on their way out.
JSpeed6 is offline   Reply With Quote
Old 11-01-2015, 12:00 AM   #3
Elite Member
iTrader: (2)
 
Join Date: Jun 2006
Location: ABQ, NM
Posts: 1,850
Total Cats: -8
Default

Quote:
Originally Posted by JSpeed6 View Post
One major potential cause is alignment bolts loose/on their way out.

Correctamundo
BenR is offline   Reply With Quote
Old 11-01-2015, 07:30 AM   #4
Junior Member
 
slug_dub's Avatar
 
Join Date: Sep 2010
Location: QLD, 'straya
Posts: 111
Total Cats: 21
Default

If it is a loose bolt I guess you just tighten it up... but what would constitute the bolt being on the way out?

I have clunkings too, will give them an inspection.
slug_dub is offline   Reply With Quote
Old 11-01-2015, 11:28 AM   #5
Hittin' Boost & Cones
iTrader: (2)
 
240_to_miata's Avatar
 
Join Date: May 2007
Location: Cromwell, Connecticut
Posts: 2,572
Total Cats: 11
Default

I have the same style clunk coming from the front end. It started when I went to wilwoods. Didn't go away when I redid all the bushings/alignment bolts/hubs etc. I always assumed it was the pads shifting in the calipers.

Subbed for ideas.
240_to_miata is offline   Reply With Quote
Old 11-01-2015, 08:24 PM   #6
Elite Member
iTrader: (2)
 
Join Date: Jun 2006
Location: ABQ, NM
Posts: 1,850
Total Cats: -8
Default

Quote:
Originally Posted by slug_dub View Post
If it is a loose bolt I guess you just tighten it up... but what would constitute the bolt being on the way out?

I have clunkings too, will give them an inspection.

Just tightening the old bolts doesn't often solve it, you need new bolts and they need to have the **** tightened out of them.
BenR is offline   Reply With Quote
Old 11-01-2015, 09:03 PM   #7
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,201
Total Cats: 260
Default

My car has spent 21 years through rough Michigan seasons and i just recently got the "clunk". I can't imagine something just now decided to loosen up, i have a hell of a time forcing things to loosen up. haha

I'll tear into it more once the car gets up on the lift for winter. If i find anything i'll report back.
Erat is online now   Reply With Quote
Old 11-11-2015, 05:53 AM   #8
Junior Member
Thread Starter
 
Join Date: Oct 2014
Location: USA
Posts: 125
Total Cats: -65
Default

Quote:
Originally Posted by JSpeed6 View Post
One major potential cause is alignment bolts loose/on their way out.
Hmm sucks I just got an alignment. Can I replace the bolts and be very careful putting them back where they belong so I dont have to re-align?
Maybe I should just buy one of those tape measure and level DIY alignment kits and do it myself.
Guy Farting is offline   Reply With Quote
Old 11-11-2015, 01:58 PM   #9
Supporting Vendor
iTrader: (1)
 
OGRacing's Avatar
 
Join Date: May 2014
Posts: 1,764
Total Cats: 46
Default

Quote:
Originally Posted by Guy Farting View Post
Hmm sucks I just got an alignment. Can I replace the bolts and be very careful putting them back where they belong so I dont have to re-align?
Maybe I should just buy one of those tape measure and level DIY alignment kits and do it myself.
use a pry bar and give the bushings a little wiggle. they shouldn't move. if that checks out check the guide pins in the rear calipers.

I had a noise, same situation, under braking clunk. it was the upper A arm bushings went bad. it would slide back and forth. i went nuclear and got V8 roadsters Hem joint A arms. problem is gone.
OGRacing is offline   Reply With Quote
Old 11-11-2015, 05:51 PM   #10
Junior Member
Thread Starter
 
Join Date: Oct 2014
Location: USA
Posts: 125
Total Cats: -65
Default

Quote:
Originally Posted by OGRacing View Post
use a pry bar and give the bushings a little wiggle. they shouldn't move. if that checks out check the guide pins in the rear calipers.

I had a noise, same situation, under braking clunk. it was the upper A arm bushings went bad. it would slide back and forth. i went nuclear and got V8 roadsters Hem joint A arms. problem is gone.
HAHA seems like one of those "might as well" deals! I will have to try this out. All the bushings I looked at seemed ok but didn't really do much other than look and see if they are old looking.
Guy Farting is offline   Reply With Quote
Old 11-11-2015, 07:06 PM   #11
Elite Member
iTrader: (5)
 
Erat's Avatar
 
Join Date: Oct 2011
Location: Detroit
Posts: 4,201
Total Cats: 260
Default

I have zero movement in my bushings. Both sides upper and lower control arms, I was reefing on them too. They look a little deteriorated, but then again they're 21 years old.
Erat is online now   Reply With Quote
Old 11-11-2015, 07:40 PM   #12
Senior Member
iTrader: (3)
 
Join Date: Dec 2008
Location: KY
Posts: 700
Total Cats: 51
Default

If you just had the car aligned, they probably just didn't get the alignment bolts tight enough. I just recently had a clunk under braking right after getting an alignment and torquing the alignment bolts got rid of the noise. Just hold the head of the bolt so it can't turn and crank down on the nut.
jpreston is offline   Reply With Quote
 
 
Reply

Related Topics
Thread Thread Starter Forum Replies Last Post
Turbo ND? Cool car Corky Bell Prefabbed Turbo Kits 23 02-11-2016 02:42 PM
WTB: Terbuh parts/"Kit" and MSPNP for my 95. Maybe your whole car? dohc5spd2dr WTB 9 11-22-2015 02:08 AM
Coilovers?? cale saurage WTB 5 11-09-2015 07:23 PM
ISC valve issue? Fatvod MEGAsquirt 5 10-31-2015 01:01 AM
Check my 1.8 build parts nixer600 Engine Performance 11 10-27-2015 03:56 PM


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



All times are GMT -4. The time now is 05:43 PM.