Clunking sound - JeepForum.com

 
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post #1 of 11 Old 05-02-2012, 10:57 AM Thread Starter
gcotterl
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2004 KJ Liberty 
 
Join Date: Aug 2006
Location: riverside ca
Posts: 74
Clunking sound

Ever since my 2004 Jeep Liberty was new, a "clunking" or "bottoming-out" sound has come from the rear end when I drive over speed bumps (or humps); through parking lots with uneven surfaces; over railroad tracks, etc. It seems more noticeable at slow speeds (less than 10 MPH) than higher speeds.

In December 2011, I had installed:
4 new Michelin tires
front and rear shocks & struts
Old Man Emu coil springs on the front

What might be the cause of the noise?

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post #2 of 11 Old 05-02-2012, 10:56 PM
brittee
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You may have a broken motor mount
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post #3 of 11 Old 05-03-2012, 11:37 AM Thread Starter
gcotterl
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Last time I looked, the motor and the motor mounts were under the hood (at the front of my Liberty) not at the rear where the "clunking" sound is coming from.
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post #4 of 11 Old 05-03-2012, 01:51 PM
chachums
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Location: Churchville
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check the strut, i had a strut make the sound like that and i found out it was improperly manufactured, my mechanic took it apart reassembled it and it was good to go.

'04 Jeep Liberty
K&N Intake, Flowmaster Super 88 muffler.
OME NS131 Front Struts, OME927 H/D front Springs, Strut Top Plates; Rear OME948 H/D springs, OME132L Rear Long Travel Shocks and pair of rear extended bump stops.
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post #5 of 11 Old 05-03-2012, 02:50 PM
jeepkj617
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It is going up that you hear it or coming back down? aka it is as soon as the rear axle hits the speedbump or when it comes off it

"What do you mean it don't work? Just hit it with a bigger hammer!"

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post #6 of 11 Old 05-03-2012, 02:53 PM Thread Starter
gcotterl
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According to WIKIBOOKS, the Jeep Liberty has:
STRUTS in the FRONT
SHOCKS in the REAR.

The "clunking" noise is coming from the rear.

As I mentioned in my original post, in December 2011, I had:
new struts and coil springs installed in the front
new shocks installed in the rear.
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post #7 of 11 Old 05-03-2012, 03:36 PM
tjkj2002
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Quote:
Originally Posted by gcotterl View Post
According to WIKIBOOKS, the Jeep Liberty has:
STRUTS in the FRONT
SHOCKS in the REAR.

The "clunking" noise is coming from the rear.

As I mentioned in my original post, in December 2011, I had:
new struts and coil springs installed in the front
new shocks installed in the rear.
The KJ uses coilover assemblies in the front,so yes it has front and rear shocks.Struts have no upper control arm and the KJ has a upper control arm.Plus a strut requires a top rotating plate as a strut is a structural part of the suspension,the KJ's front coilovers have no such rotating plate.

For the clunk in the rear check the upper rear shock bolts,they need to be very tight.


On a side note why only lift coils on teh front and not add the matching rear OME coils

'02 Liberty sitting on 35" tires,HP44,RockJock60,and AtlasII t-case
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post #8 of 11 Old 05-03-2012, 04:02 PM Thread Starter
gcotterl
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Location: riverside ca
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I will check the upper rear shock bolts.

Re: Last December, I replaced all 4 factory-installed Goodyear Wrangler SR-A tires with 4 new Michelin LTX M/S2 tires -- same size, same inflation, mounted on the same rims -- but when I turned the steering wheel all the way to the left or right, the Michelins rubbed on the inside liner of the front wheel wells.

Assuming that the OEM shocks and struts had sagged over the 7 years, I had Monroe Sensa-Trac 71577 struts installed on the front and Monroe Sensa-Trac 37203 shocks installed on the rear. But the Michelins still rubbed on the front wheel wells so I then had the OME coil springs installed on the front.
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post #9 of 11 Old 05-03-2012, 08:11 PM
cooltoolguy
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2001 TJ Wrangler 
 
Join Date: Feb 2008
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this may be a far reach but... you said since new this has made that sound. soo probably could rule out suspension? try looking up inside the driver rear fender where fuel filler is, i believe there is a large plastic vent type canister up there hooked to the evap system, maybe its loose? knocking the inner fender liner or body? maybe the jack is loose under rear seat? just tossing ideas .....

2001 tj sahara, 2002 liberty renegade
1995 yj soon to get LT-1
1988 YJ laredo with 4.0 swap and western plow
2003 GMC CC D/A Dually (daily driver) , 2003 Kawasaki ZX12R
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post #10 of 11 Old 06-12-2012, 09:29 AM Thread Starter
gcotterl
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Clunking sound

On May 3, 2012, jeepkj617 asked if I hear the "clunking sound" when the rear axle hits the speedbump or when it comes off it"?

The clunking sound occurs when the rear axle comes off (comes down from) the speedbump.
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post #11 of 11 Old 06-12-2012, 11:24 AM
tommudd
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Location: Central OH/ Kilimanjaro,Tanzania
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Quote:
Originally Posted by gcotterl View Post
According to WIKIBOOKS, the Jeep Liberty has:
STRUTS in the FRONT
SHOCKS in the REAR.

The "clunking" noise is coming from the rear.

As I mentioned in my original post, in December 2011, I had:
new struts and coil springs installed in the front
new shocks installed in the rear.
And you trust what is on WIKI? Its only as good as the information that is put on it, which at times is not worth anything

04 KJ 4.5 JBA lift, 03 KJ 2.5 JBA coilovers,
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