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

Need Help! ... Not really, just want to know what this is...

Thread Tools
 
Search this Thread
 
Old 12-14-22, 08:28 PM
  #1  
Entropic86
Rookie
Thread Starter
 
Entropic86's Avatar
 
Join Date: Mar 2011
Location: AZ
Posts: 37
Received 7 Likes on 7 Posts
Default Need Help! ... Not really, just want to know what this is...

What the heck is this camber under the front underbody cover on my 1999 LS? Is it for barometric pressure, outside humidity, condensate discharge? It is an empty chamber with one tube that disappears up into the side of the engine bay. It could be a fun game to guess what it does and if it's superfluous (doubt it). I looked at some of the schematics and haven't found it, so I was hoping someone could point me in the right direction.

Old 12-16-22, 03:32 PM
  #2  
timmy0tool
Moderator
iTrader: (7)
 
timmy0tool's Avatar
 
Join Date: Sep 2008
Location: 714/949, SoCal
Posts: 6,985
Received 425 Likes on 379 Posts
Default

very interesting! this was not on my 97 so likely it's a 98-00 only part. if there is a tube there is a part number! someone will find it eventually.
Old 12-16-22, 07:06 PM
  #3  
CELSI0R
Racer
 
CELSI0R's Avatar
 
Join Date: Nov 2015
Location: NJ
Posts: 1,457
Received 295 Likes on 232 Posts
Default

The part number is molded into the piece, right in the middle of it in the photo. Can't tell if it ends in 50010 or another number

Plug that into a parts search, and you'll find the answer OP
Old 12-16-22, 07:11 PM
  #4  
Entropic86
Rookie
Thread Starter
 
Entropic86's Avatar
 
Join Date: Mar 2011
Location: AZ
Posts: 37
Received 7 Likes on 7 Posts
Default

It is just an empty plastic chamber with a tube that goes up into the a tight area. I tied a string to the tube to wiggle it while I looked from the top of the engine bay to see where it goes. I couldn't find anything so maybe it goes to a hard line or something.

The rivets holding it in place are broken, so I'll just cut off the rivets with end cutters and put some new rivets in... But I'm still interested in what it is! Thanks all,

E86
Old 12-16-22, 07:51 PM
  #5  
CELSI0R
Racer
 
CELSI0R's Avatar
 
Join Date: Nov 2015
Location: NJ
Posts: 1,457
Received 295 Likes on 232 Posts
Default

Originally Posted by Entropic86
It is just an empty plastic chamber with a tube that goes up into the a tight area. I tied a string to the tube to wiggle it while I looked from the top of the engine bay to see where it goes. I couldn't find anything so maybe it goes to a hard line or something.

The rivets holding it in place are broken, so I'll just cut off the rivets with end cutters and put some new rivets in... But I'm still interested in what it is! Thanks all,

E86
Just need this number and we'll know exactly what part it is:
Attached Thumbnails Need Help! ... Not really, just want to know what this is...-98lspartno.jpg  
Old 12-16-22, 09:47 PM
  #6  
paulo57509
Instructor
 
paulo57509's Avatar
 
Join Date: Nov 2007
Location: CA
Posts: 874
Received 214 Likes on 187 Posts
Default

It's a canister that's attached to the charcoal canister.


The following users liked this post:
Stroock639 (12-20-22)
Old 12-17-22, 02:15 PM
  #7  
fondu
Intermediate
 
fondu's Avatar
 
Join Date: Oct 2019
Location: Florida
Posts: 264
Received 48 Likes on 42 Posts
Default

Originally Posted by paulo57509
It's a canister that's attached to the charcoal canister.

Mystery solved.. my '94 has the same thing under the radiator albeit it looks a little different. However I can see that it connects to the charcoal canister on the driver's side.
Old 12-17-22, 10:26 PM
  #8  
Entropic86
Rookie
Thread Starter
 
Entropic86's Avatar
 
Join Date: Mar 2011
Location: AZ
Posts: 37
Received 7 Likes on 7 Posts
Default

I should have looked at parts drawings for the fuel system... or at the number right on the part!

It is part number 77770-50010, TANK ASSEMBLY, CHARCOAL CANISTER. Part applies to 1995-2000.

Not sure if it just exhausts fuel vapor beneath the engine compartment.

Interesting that this Drawing shows it connecting to the fuel lines to the rear of the car... Or does the dotted line just skip the charcoal canister assembly?









Old 12-20-22, 09:15 AM
  #9  
timmy0tool
Moderator
iTrader: (7)
 
timmy0tool's Avatar
 
Join Date: Sep 2008
Location: 714/949, SoCal
Posts: 6,985
Received 425 Likes on 379 Posts
Default

it appears to just be a breather for the cannister or the tank fill spout.
fuel vapor is not pushed in there or that defeats the purpose of a charcoal cannister in the first place; fuel vapor is re-routed back to the intake manifold (after the charcoal) to get burned again so it never sees atmosphere = less emissions.
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
vienh
IS - 3rd Gen (2014-present)
0
05-11-19 12:25 AM
S2dannyKeo
GS - 2nd Gen (1998-2005)
1
03-23-12 11:11 PM
varcity64
GS - 2nd Gen (1998-2005)
10
10-28-06 12:01 PM
crsow
GS - 2nd Gen (1998-2005)
1
08-19-03 10:06 AM



Quick Reply: Need Help! ... Not really, just want to know what this is...



All times are GMT -7. The time now is 11:12 PM.