Go Back   Club Lexus Forums > Lexus Model Forums > LS Models > LS430
Sign in using an external account
Register Forgot Password?

Still can't figure out this noise

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 07-03-14, 05:17 AM   #16
sscheuri
Driver School Candidate
Trader Score: (0)
 
Join Date: Jan 2011
Location: VA
Posts: 14
Default Experiencing this as well

Had my transmission serviced about two weeks ago (drain and fill only - thanks contributors of ClubLexus!).

Now I am hearing a metallic ringing much like what is on the video. However:
1. I am not hearing it inside the car.
2. I can only hear it when all of the following are true:
a. Car starts cold.
b. Car is in gear other than Park.
3. After about a 25 minute drive, the sound is gone.

Here is the sound:

My thinking is a heat shield but these other comments about motor and transmission mounts got me thinking differently as well.
Any other ideas?
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
sscheuri is offline   Reply With Quote
Old 07-03-14, 05:33 AM   #17
ginessls43
Driver School Candidate
Trader Score: (0)
 
Join Date: Apr 2014
Location: NY
Posts: 4
Default

Definently related to the AC system as I have the same noise, and it is only present with AC on..
ginessls43 is offline   Reply With Quote
Old 07-03-14, 05:57 AM   #18
sscheuri
Driver School Candidate
Trader Score: (0)
 
Join Date: Jan 2011
Location: VA
Posts: 14
Default Will test that today

I don't believe my AC is on when I turn on the car (because I always turn it off before I turn the car off - my wife is a different story).
I will check that condition today. Thanks
sscheuri is offline   Reply With Quote
Old 07-03-14, 08:13 AM   #19
ancdmd
Lead Lap
Trader Score: (0)
 
Join Date: Mar 2007
Location: Miami Beach, FL
Posts: 731
Default

I seriously doubt that is A/C related. Sounds very similar to the noise that STILL persists in my car after 3-4 years of trying to diagnose it. Unlike yours though, mine occurs unrelated to engine temperature and/or duration of drive. I can only really hear my noise while the car is driving. I can detect a slight noise around 2000rpm while in park or neutral, but not anywhere near like when I am driving.

On one occasion recently I started the car (at full operating temp) and my noise immediately exploded into a very loud awful clanking sound emanating from under the car near the transmission area, as if I had a tin can loose and bouncing around inside the exhaust pipe. It worsened as I revved the motor. I put it in drive and moved the car about thirty feet before putting it back in park and shutting off the motor. After a few seconds I started it up again and it was quiet, hasn't happened like that again since, and that was about six months ago I think. F'ing perplexed.
ancdmd is offline   Reply With Quote
Old 07-03-14, 02:20 PM   #20
Slvr surfr
Lexus Test Driver
Trader Score: (1)
 
Slvr surfr's Avatar
 
Join Date: Oct 2009
Location: dc
Posts: 1,044
Default

Quote:
Originally Posted by ancdmd View Post
I seriously doubt that is A/C related. Sounds very similar to the noise that STILL persists in my car after 3-4 years of trying to diagnose it. Unlike yours though, mine occurs unrelated to engine temperature and/or duration of drive. I can only really hear my noise while the car is driving. I can detect a slight noise around 2000rpm while in park or neutral, but not anywhere near like when I am driving.

On one occasion recently I started the car (at full operating temp) and my noise immediately exploded into a very loud awful clanking sound emanating from under the car near the transmission area, as if I had a tin can loose and bouncing around inside the exhaust pipe. It worsened as I revved the motor. I put it in drive and moved the car about thirty feet before putting it back in park and shutting off the motor. After a few seconds I started it up again and it was quiet, hasn't happened like that again since, and that was about six months ago I think. F'ing perplexed.
Have your exhaust heat shields inspected. Had a similar sound not too long ago.
__________________
05 LS430- Mercury Metallic (ML) aka The Silver Surfer
Slvr surfr is online now   Reply With Quote
Old 07-03-14, 02:51 PM   #21
L8RSk8R
Driver
Trader Score: (0)
 
Join Date: Nov 2012
Location: Ca
Posts: 120
Default

Object bouncing around, in the transmission bell housing.
L8RSk8R is offline   Reply With Quote
Old 07-03-14, 05:35 PM   #22
ls430lover
Pole Position
Trader Score: (0)
 
Join Date: Jan 2013
Location: Ca
Posts: 231
Default

hi i believe its the servos in the ac system that there are two
i have the same issue when there failing they sound like that, i didnt do them for cost and they have to remove dash each part is around a couple hundred dollars
i don't know that it is the issue 100% but sounds like its the servo motors
ls430lover is offline   Reply With Quote
Old 07-03-14, 06:12 PM   #23
ls430lover
Pole Position
Trader Score: (0)
 
Join Date: Jan 2013
Location: Ca
Posts: 231
Default

i take back my remarks i saw the video from interior by ac duct
underneath is a whole other ball game
check the catalytic converters?
ls430lover is offline   Reply With Quote
Old 07-03-14, 06:30 PM   #24
L8RSk8R
Driver
Trader Score: (0)
 
Join Date: Nov 2012
Location: Ca
Posts: 120
Default

Get one of these


Poke around
L8RSk8R is offline   Reply With Quote
Old 07-04-14, 04:33 PM   #25
ancdmd
Lead Lap
Trader Score: (0)
 
Join Date: Mar 2007
Location: Miami Beach, FL
Posts: 731
Default

Quote:
Originally Posted by Slvr surfr View Post
Have your exhaust heat shields inspected. Had a similar sound not too long ago.
First thing I did years ago was remove the heat shields from the y-pipe. Even replaced the y-pipe, didn't help.
ancdmd is offline   Reply With Quote
Old 07-04-14, 04:35 PM   #26
ancdmd
Lead Lap
Trader Score: (0)
 
Join Date: Mar 2007
Location: Miami Beach, FL
Posts: 731
Default

Quote:
Originally Posted by ls430lover View Post
i take back my remarks i saw the video from interior by ac duct
underneath is a whole other ball game
check the catalytic converters?
Checked cats when I replaced the y-pipe, they are good. I did buy a stethoscope and checked everything under that car while it was running and couldn't determine that anything was amiss.
ancdmd is offline   Reply With Quote
Old 07-06-14, 01:59 AM   #27
RushNatU
Rookie
Trader Score: (0)
 
Join Date: Mar 2014
Location: Indiana
Posts: 76
Default

I had a metallic sound coming from an exhaust clamp that had broke and was rattling on the pipe. It was not for a heat shield but to hold the two pipes together. Right in line with the drivers door...
RushNatU is offline   Reply With Quote
Old 07-07-14, 08:46 AM   #28
sscheuri
Driver School Candidate
Trader Score: (0)
 
Join Date: Jan 2011
Location: VA
Posts: 14
Default Thanks

Have heard some great suggestions here. To sum up my symptoms to date:
1. Heard during cold start and in reverse, neutral, forward gears.
2. Louder in reverse and forward gears.
3. Goes away after car has warmed up.
4. AC on or off does not affect sound. I do not hear the sound through the AC vents at all.

And I have heard these solutions:
1. heatshields - check to ensure they are attached securely.
2. exhaust pipe brackets that have cracked or otherwise not connected properly. Could these have been touched during a transmission drain and fill service?
3. something could be loose in the transmission bell housing.
4. get an automotive stethoscope.

Thoughts on level of damage occurring:
1. If a loose piece of metal was bouncing around in the transmission bell housing, I think the car would not be driving.
2. Pipe brackets - some exhaust escapes to the atmosphere before going to the cats. Oh well.
3. Heatshields - extra warm in some area of the car I have not discovered yet.
In summary - not significantly impacting the car right now.

I have a friend who has a lift in his garage so hopefully I can get over there next weekend to check it out. I appreciate all the suggestions and will report back as I learn more.

To the original poster - thanks for starting this thread and hopefully something "new" for you to examine is coming of it. Similar sounds but we are hearing it in different parts of the car. Mine is 2001 Ultra Luxury with 114k miles.
sscheuri is offline   Reply With Quote
Old 07-07-14, 09:17 AM   #29
Lavrishevo
Lexus Champion
Trader Score: (1)
 
Lavrishevo's Avatar
 
Join Date: Jan 2012
Location: Atlanta, GA
Posts: 2,320
Default

I would definitely check the level of the transmission fluid. Did a dealer do the service? I don't trust most shops to perform this procedure correctly. Even though the 01 is much easier it can still be done wrong. Did you check your fluid level after the transmission has been driven for a while and parked and perfectly flat ground? What type of fluid was used?
__________________
2004 LS430 UL
1999 LS400
Lavrishevo is offline   Reply With Quote
Old 07-07-14, 10:52 AM   #30
sscheuri
Driver School Candidate
Trader Score: (0)
 
Join Date: Jan 2011
Location: VA
Posts: 14
Default

I used a local shop (Curry's Automotive) and supplied them with three quarts of the correct Toyota fluid. I don't believe the trans fluid had been changed fro 13 years. At my specification, they replaced the transmission filter and did a drain and fill. They said the drained out six quarts. I was initially surprised but have since read on these forums that is normal if a long drain period is observed. Obviously they supplanted what I provided with three quarts from another fluid which I can inquire about.
I actually checked it yesterday, but that was after I started the car and briefly moved it to non-level ground and back to level. I will recheck the fluid level. IIRC, and not having my manual handy, the fluid level should be between the two tick marks on the dip stick. Correct?
sscheuri is offline   Reply With Quote
Old 07-07-14, 10:52 AM
 
 
 
 
Reply

Tags
ac, car, figure, fort, freon, its, lauderdale, loud, low, ls430, make, noise, noises, sound, tinny

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
2002 LS430 noise is driving me nuts ancdmd Maintenance 17 10-20-14 12:14 PM
Noise In My Lexus Lx 570 2012 x4ghost4x LX570 5 02-27-14 07:21 PM
Suspension noise (vids inside) Anyone ever have this sound? patjza80 Suspension and Brakes 0 10-28-13 10:59 PM
engine noise kyle0k IS - Second Generation 16 05-08-13 07:19 PM
Please help diagnose these noises! *AUDIO* ancdmd LS430 13 12-19-12 01:35 PM

All times are GMT -7. The time now is 05:42 PM.

Join ClubLexus
Advertising


Copyright © 2000-2008 Internet Brands, Inc. All Rights Reserved
Privacy Policy | Disclaimer | Terms of Use | JOBS


Get all contact info