Go Back   Club Lexus Forums > Lexus Model Forums > LS Models > LS400
Sign in using an external account
Register Forgot Password?

Did a spirited run and pulled into driveway and car sounded like a truck....

Reply
 
 
 
 
Thread Tools Search this Thread Display Modes
Old 12-07-11, 12:13 AM   #1
turbo556
Rookie
Trader Score: (0)
 
Join Date: Sep 2011
Location: SC
Posts: 58
Default Did a spirited run and pulled into driveway and car sounded like a truck....

Hey guys...

My 2000 LS 400 had a funny sound when I pulled in the driveway that my father heard....I had floored the car to like 85 down our street then slowed down and pulled into our driveway.....he said "it sounded like a truck"...haven't heard it or noticed it myself since then....I have noticed that when I pull up next to a wall that the idle can tend to sound more throaty or lopey when the car is warm as opposed to the smooth idle normally when it is hardly noticeable or distinctive....sounds hardly noticeable unless i'm next to a wall...also noticed that when I turn the car off after it being warm I hear metal ticking (like the sound of metal cooling down)....not sure if this is normal....

Any ideas?
This ad is not displayed to registered members.
Register your free account today and become a member on Club Lexus!
turbo556 is offline   Reply With Quote
Old 12-07-11, 02:25 AM   #2
PureDrifter
BahHumBug
Trader Score: (10)
 
PureDrifter's Avatar
 
Join Date: Aug 2004
Location: California
Posts: 22,648
PureDrifter
Send a message via AIM to PureDrifter
Default

probably has an exhaust leak.
__________________
1. Black on Black 1999 LS400 PM-spec
-Maya-Megan-Magnaflow-LSportline-Xenondepot-PPE Engineering-Duce-Platinum VIP-Figs Engineering-R1Concepts-
2. 1989 Toyota Supra white package
Current Status: -500 Internal System Error-
3. Black 2004 IS300 -Manaray-HKS-Eibach-
4. Ebony Teal 1995 LS400 11-8-06
PureDrifter is offline   Reply With Quote
Old 12-07-11, 04:56 AM   #3
billydpowe
Lexus Champion
Trader Score: (1)
 
billydpowe's Avatar
 
Join Date: Mar 2009
Location: texas
Posts: 1,667
bill powell
Default

sounds right to me..
__________________
My Bible Study is at:
http://billydpowell.synthasite.com
take a look. my hope is it helps people get into their Bible where the Holy Spirit can teach them the REAL truth, not my words, which are just stimulants.... 2 Tim 2:15 Study.....

CARS I HAVE OWNED
http://s810.photobucket.com/user/bil...20owned?sort=9
billydpowe is offline   Reply With Quote
Old 12-07-11, 06:06 AM   #4
cf3232
Driver School Candidate
Trader Score: (0)
 
Join Date: Jul 2011
Location: MD
Posts: 24
Default

I would say an exhaust leak as well.

My 1998 Y pipe was rusted when I bought it. I had no idea. The car was new to me and I liked the sound. In MD we have inspections and when I took it to the inspection station the mechanic said you have an exhaust leak. I thought whoa I just got this car how do you know that. He proceeded to start it, and said do you hear that? I was like yeah. He said if you hear that something is wrong. You should not hear anything from the exhaust or engine at idle from this car. CASE CLOSED!!

I had to buy a new Y pipe and replace. They do not sell the part aftermarket for the 98-2000 so you have to get it from Lexus. Online can be had for $500 and I did the remove and install myself. Shop wanted a cool $1000 for the part and install, and I was referred there and was getting a deal.
cf3232 is offline   Reply With Quote
Old 12-07-11, 06:18 AM   #5
McPierson
Pole Position
Trader Score: (2)
 
Join Date: Jun 2011
Location: Missouri
Posts: 243
Default

I had a similar experience, but mine was more of a deep strong vibration in gear at idle. The engine was moving a pretty fair amount so I'm convinced I need new motor mounts (being shipped).
McPierson is offline   Reply With Quote
Old 12-07-11, 06:23 AM   #6
idriveals4
Driver School Candidate
Trader Score: (0)
 
Join Date: Oct 2011
Location: GA
Posts: 41
Default

Truck sound meaning that possibly the Clutch fan was fully engaged and the fan was spinning at full speed? A warm engine would cause that. Perhaps what he heard was unrelated to what you are hearing next to the wall?
idriveals4 is offline   Reply With Quote
Old 12-07-11, 09:56 AM   #7
turbo556
Rookie
Trader Score: (0)
 
Join Date: Sep 2011
Location: SC
Posts: 58
Default

Me and a mechanic the other day checked the entire exhaust pipes visually and didn't see anything....any ideas? I did have valve covers leaking on the exhaust shrouds for several months...not sure if this could have caused it....
turbo556 is offline   Reply With Quote
Old 12-07-11, 10:23 AM   #8
RA40
Moderator
Trader Score: (6)
 
RA40's Avatar
 
Join Date: May 2003
Location: California
Posts: 15,561
Default

Sounds like an exhaust leak to me as well. Even the tiniest will alter the way the car sounds so might not be obvious yet. Sounds coming from front, center or rear?
__________________

Mike
RA40 is offline   Reply With Quote
Old 12-07-11, 02:23 PM   #9
PureDrifter
BahHumBug
Trader Score: (10)
 
PureDrifter's Avatar
 
Join Date: Aug 2004
Location: California
Posts: 22,648
PureDrifter
Send a message via AIM to PureDrifter
Default

seafoam the car, will help performance and you'll find the leak easyy with all the smoke
__________________
1. Black on Black 1999 LS400 PM-spec
-Maya-Megan-Magnaflow-LSportline-Xenondepot-PPE Engineering-Duce-Platinum VIP-Figs Engineering-R1Concepts-
2. 1989 Toyota Supra white package
Current Status: -500 Internal System Error-
3. Black 2004 IS300 -Manaray-HKS-Eibach-
4. Ebony Teal 1995 LS400 11-8-06
PureDrifter is offline   Reply With Quote
Old 12-07-11, 03:36 PM   #10
LJBSJB
Driver School Candidate
Trader Score: (0)
 
LJBSJB's Avatar
 
Join Date: Nov 2011
Location: New Brunswick
Posts: 48
Default

I don't hear this metal expanding / cooling sound on my LS400 exhuaust, but I used to on my Jetta.... And, like you, I only heard it when I got out, or when I was up against a wall, curb or guard rail and could hear the echo.
LJBSJB is offline   Reply With Quote
Old 12-08-11, 06:19 AM   #11
idriveals4
Driver School Candidate
Trader Score: (0)
 
Join Date: Oct 2011
Location: GA
Posts: 41
Default

We used to joke that only performance cars did the cooling down tinking exhaust sound. Most of my cars have done this after a long or particularly hard run. I've never associated it with a problem as it's happened on different cars from different manufactures on both old and new ones.
idriveals4 is offline   Reply With Quote
Old 12-08-11, 08:06 PM   #12
3UZFTE
Moderator
Trader Score: (0)
 
Join Date: Oct 2007
Location: Minnesota
Posts: 1,137
Default

Is it a loud roaring (wind) noise, or is it a tick (exhaust) noise. Obviously it could be exhaust if it's noticeably louder with engine RPMs. I'm not sure if the 00' LS has a fan clutch, but those are the usually suspect for the wind/roaring noise, possibly an e-fan might make enough racket.
3UZFTE is offline   Reply With Quote
Old 12-09-11, 07:28 AM   #13
cf3232
Driver School Candidate
Trader Score: (0)
 
Join Date: Jul 2011
Location: MD
Posts: 24
Default

Quote:
Originally Posted by turbo556 View Post
Me and a mechanic the other day checked the entire exhaust pipes visually and didn't see anything....any ideas? I did have valve covers leaking on the exhaust shrouds for several months...not sure if this could have caused it....
You can not visually inspect it. Especially at the Y pipe. The Y pipe has heat shielding around it the entire length fromt he cats just before it goes into the resonator and if I am not mistaken after the resonator as well. Mine was rusted through under the heat shielding on the Y pipe. You would never visibly see it rusted through in those areas.
cf3232 is offline   Reply With Quote
Old 12-09-11, 12:28 PM   #14
McPierson
Pole Position
Trader Score: (2)
 
Join Date: Jun 2011
Location: Missouri
Posts: 243
Default

Maybe you lost one of the many weights Lexus hangs to dampen resonance, lol, just kidding.
McPierson is offline   Reply With Quote
Old 12-09-11, 12:29 PM   #15
RA40
Moderator
Trader Score: (6)
 
RA40's Avatar
 
Join Date: May 2003
Location: California
Posts: 15,561
Default

As well, if the leak is topside, it will not be visible under the car. Short of dropping the whole system, PD's suggestion for a Seafoam would turn it up.
__________________

Mike
RA40 is offline   Reply With Quote
Old 12-09-11, 12:29 PM
 
 
 
 
Reply

Tags
ac, car, celica, exhaust, hot, leak, lexus, lopeywhen, ls400, sound, sounds, tinking, toyota, truck, vibration

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

All times are GMT -7. The time now is 07:13 PM.

Join ClubLexus
Advertising


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


Get all contact info