Notices
LS - 1st and 2nd Gen (1990-2000) Discussion topics related to the 1990 - 2000 Lexus LS400

Front Suspension Clunk

Thread Tools
 
Search this Thread
 
Old Dec 16, 2011 | 07:00 PM
  #1  
S30ZG's Avatar
S30ZG
Thread Starter
Pole Position
iTrader: (5)
 
Joined: Aug 2009
Posts: 332
Likes: 0
From: WA
Default Front Suspension Clunk

Hey guys I'm having a bit of trouble diagnosing a clunking noise from the front of suspension of my car. Just to give some background on the car, I have replaced the UCAs, LBJs and tierods all within the past 4 months. I also have BC coils (18k/10k) on the car, and its a '91 with approximately 180k on the clock.

I'm just wondering what would be the next logical part to replace up front? I've read that the strut rod bushings deteriorate over time but wanted to know if there is anything else that's prone to wear over time that I could replace?
Reply
Old Dec 16, 2011 | 07:26 PM
  #2  
RA40's Avatar
RA40
Super Moderator
20 Year Member
Liked
Loved
Community Favorite
iTrader: (6)
 
Joined: May 2003
Posts: 20,895
Likes: 490
From: California
Default

The strut bar bushing is pretty much THE one. I had my guy go over the front on mine with the express consent fix what it needs. In his experience, he said 90% of the time the strut bar bushing is the one that will fix the noises. Mine at the time had 155K miles and he thought the UCA, LCA were fine. Now if the suspension has been knocked around and allowed to wear, other areas may need attention.

What sucks is getting an alignment one by one as you replace these single parts. I did a multi replacement so I won't know unless I were to measure each part for spec. I'm not about to do that. Especially to find that a part was still good and I had it removed for the sake of replacement. I live with the thought that it was worn.
Reply
Old Dec 16, 2011 | 07:28 PM
  #3  
LiCelsior's Avatar
LiCelsior
Retired
CL Folding 500,000
15 Year Member
iTrader: (32)
 
Joined: May 2007
Posts: 12,364
Likes: 19
From: NY
Default

any specific condition when its clunking? ie going over a bump, turning etc.
Reply
Old Dec 16, 2011 | 08:07 PM
  #4  
S30ZG's Avatar
S30ZG
Thread Starter
Pole Position
iTrader: (5)
 
Joined: Aug 2009
Posts: 332
Likes: 0
From: WA
Default

Originally Posted by LiCelsior
any specific condition when its clunking? ie going over a bump, turning etc.
ah I forgot to include that part. I can hear the clunk on bumpy roads at lower speeds (5-35 mph) but I can't hear it at freeway speeds (40-70). It occurs wile driving straight and occasionally while taking sharp, low speed turns.

Originally Posted by RA40
The strut bar bushing is pretty much THE one. I had my guy go over the front on mine with the express consent fix what it needs. In his experience, he said 90% of the time the strut bar bushing is the one that will fix the noises. Mine at the time had 155K miles and he thought the UCA, LCA were fine. Now if the suspension has been knocked around and allowed to wear, other areas may need attention.

What sucks is getting an alignment one by one as you replace these single parts. I did a multi replacement so I won't know unless I were to measure each part for spec. I'm not about to do that. Especially to find that a part was still good and I had it removed for the sake of replacement. I live with the thought that it was worn.
Okay cool good to know about the strut bar bushing, I was kinda leaning in that direction but thought it maybe something else.
Reply
Old Dec 16, 2011 | 08:22 PM
  #5  
LiCelsior's Avatar
LiCelsior
Retired
CL Folding 500,000
15 Year Member
iTrader: (32)
 
Joined: May 2007
Posts: 12,364
Likes: 19
From: NY
Default

its not like a sway bar bushing clunk is it?
Reply
Old Dec 16, 2011 | 08:52 PM
  #6  
JimsGX's Avatar
JimsGX
Lexus Test Driver
 
Joined: Apr 2004
Posts: 1,265
Likes: 9
From: MA
Default

Check the lower control arm bushings as well...
Reply
Old Dec 16, 2011 | 09:38 PM
  #7  
Cope's Avatar
Cope
Rookie
 
Joined: Aug 2011
Posts: 99
Likes: 0
From: Ga
Default

S/R Bushing took care of mine. 98 with 140K.
Reply
Old Dec 17, 2011 | 06:46 PM
  #8  
S30ZG's Avatar
S30ZG
Thread Starter
Pole Position
iTrader: (5)
 
Joined: Aug 2009
Posts: 332
Likes: 0
From: WA
Default

Originally Posted by LiCelsior
its not like a sway bar bushing clunk is it?
possibly, haven't had a chance to look at the car for the past week but I'll get it up in the air within the next 2 days.


Also I ordered some Strut rod bushings yesterday so hopefully that will alleviate the problem.
Reply
Old Dec 17, 2011 | 11:07 PM
  #9  
LiCelsior's Avatar
LiCelsior
Retired
CL Folding 500,000
15 Year Member
iTrader: (32)
 
Joined: May 2007
Posts: 12,364
Likes: 19
From: NY
Default

forgot the size but u can get the energy suspension part for it. just measure up your front sway bar size and see which bushing fits the bar.
Reply
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
Goofaroo
LS - 1st and 2nd Gen (1990-2000)
15
Jul 18, 2011 08:36 AM
cmotek24
ES - 1st to 6th Gen (1990-2018)
5
Aug 9, 2009 09:29 PM
RA40
LS - 1st and 2nd Gen (1990-2000)
18
Apr 30, 2008 07:17 PM
luvmylexus
LS - 1st and 2nd Gen (1990-2000)
9
Dec 23, 2004 10:05 AM
CTX
LS - 3rd Gen (2001-2006)
2
Aug 23, 2004 07:20 PM




All times are GMT -7. The time now is 10:23 AM.