Welcome to Bimmerfest -- The #1 Online Community for BMW related information! Please enjoy the discussion forums below and share your experiences with the 200,000 current, new and past BMW owners. The forums are broken out by car model and into other special interest sections such as BMW European Delivery and a special forum to voice your questions to the many BMW dealers on the site to assist our members!

Please follow the links below to help get you started!

Go Back   Bimmerfest - BMW Forums > Everything Else > General Automotive Forum

General Automotive Forum
All non-BMW car talk goes here...

Reply
 
Thread Tools Display Modes
  #1  
Old 10-22-2004, 02:23 PM
Kaz's Avatar
Kaz Kaz is offline
King of Rear Clunks
Location: OC, CA
 
Join Date: Dec 2001
Posts: 12,915
Mein Auto: 01 325iT, 88 M6
What's with green valve stem caps?

Over the past month, I've started noticing a LOT of cars with bright green valve stem caps. They aren't the pressure indicator ones, or the ones that light up. Just plain rubber ones, but in bright green. And I've seen em on everything from minivans and SUVs to Porsches, this morning, a 70s Mercedes diesel. Is some huge place like Costco just putting these on every car they work on or what?
__________________
2001 325i Touring Alpinweiss/Anthracite cloth, Alpina Softline
1988 M6 Royalblau/Silbergrau Nappa
Reply With Quote
Ads by Google
  #2  
Old 10-22-2004, 02:53 PM
philippek philippek is offline
Proud S ponsor
Location: Redondo Beach, CA
 
Join Date: Jul 2003
Posts: 5,678
Mein Auto: Z4 M Cpe, Miata, X6 50i
Are we talking Kawasaki Green, Grey Green or Slate Green?
Reply With Quote
  #3  
Old 10-22-2004, 03:03 PM
Kaz's Avatar
Kaz Kaz is offline
King of Rear Clunks
Location: OC, CA
 
Join Date: Dec 2001
Posts: 12,915
Mein Auto: 01 325iT, 88 M6
I'm taking like Lambo Murcielago green.
__________________
2001 325i Touring Alpinweiss/Anthracite cloth, Alpina Softline
1988 M6 Royalblau/Silbergrau Nappa
Reply With Quote
  #4  
Old 10-22-2004, 03:46 PM
Jeff_DML Jeff_DML is offline
doh!!!
Location: San Diego
 
Join Date: Mar 2002
Posts: 3,185
Mein Auto: 08 E90 M3 sold->M2 comp
Quote:
Originally Posted by Kaz
Over the past month, I've started noticing a LOT of cars with bright green valve stem caps. They aren't the pressure indicator ones, or the ones that light up. Just plain rubber ones, but in bright green. And I've seen em on everything from minivans and SUVs to Porsches, this morning, a 70s Mercedes diesel. Is some huge place like Costco just putting these on every car they work on or what?
funny just went out to lunch today with my coworker and noticed he had green valve stems. If I remeber correctly I think he did just get new tires from costco.
Reply With Quote
  #5  
Old 10-22-2004, 04:00 PM
LA525iT's Avatar
LA525iT LA525iT is offline
swinging a big stick
Location: Marina del Rey, CA
 
Join Date: Oct 2003
Posts: 3,946
Mein Auto: 03 525iT & 06 Z4 3.0si
Maybe cause they are less likely to be stolen?
__________________
My car: 2003 525iT 5M/SP/PP/Xenons/Aux/Sirius
Her car: 2006 Z4 3.0si 6M/SP/PP/Xenons/Heated Seats
Dog car: 1996 Integra SE 5M/Leather/Dog Fur/Sand
Reply With Quote
  #6  
Old 10-22-2004, 11:36 PM
Raffi's Avatar
Raffi Raffi is offline
Hi
Location: L.A.
 
Join Date: May 2002
Posts: 4,483
Mein Auto: Frankenstein monster
Latest Pep Boys craze?
__________________
'01 330ci
Reply With Quote
  #7  
Old 10-23-2004, 06:05 PM
Dave 330i's Avatar
Dave 330i Dave 330i is offline
The King of Common Sense
 
Join Date: Jan 2002
Posts: 118
Send a message via Skype™ to Dave 330i
Mein Auto:
I had my OEM valve stem caps replaced by black ones at Discount Tires when they installed my Kumho tires I purchased from Tire Rack. An engineer overlooking the details before leaving. WTF
__________________
Everybody is a genius. But if you judge a fish by its ability to climb a tree, it will live its whole life believing that it is stupid. Albert Einstein

Swim upstream. Go the other way. Ignore the conventional wisdom. If everybody is doing it one way, there’s a good chance you can find your niche by going exactly in the opposite direction", Sam Walton.
Reply With Quote
  #8  
Old 10-25-2004, 10:41 PM
operknockity's Avatar
operknockity operknockity is offline
My TARDIS is a BMW
Location: On the bleeding edge of last week
 
Join Date: Apr 2002
Posts: 5,359
Mein Auto: '02 325i
Quote:
Originally Posted by Dave 330i
I had my OEM valve stem caps replaced by black ones at Discount Tires when they installed my Kumho tires I purchased from Tire Rack. An engineer overlooking the details before leaving. WTF
Note to self.... Swap Roundel valve stem caps with cheap-azz generics before getting tires serviced/remounted.
__________________
How many posts could a repost post if a repost could post posts?

Reply With Quote
  #9  
Old 10-25-2004, 11:39 PM
PhilK PhilK is offline
Phillip
Location: Vista, CA North of San Diego
 
Join Date: May 2004
Posts: 24
Mein Auto: 1997 528i
actually, costco does put these green stem cap valves on the new tires they have.
Reply With Quote
  #10  
Old 10-26-2004, 10:58 AM
MG67's Avatar
MG67 MG67 is offline
Ik hou van Holland...
Location: Los Angeles, CA
 
Join Date: Aug 2003
Posts: 5,229
Mein Auto: 530xiT
I didn't notice yet...
Reply With Quote
  #11  
Old 10-26-2004, 11:02 AM
Desertnate's Avatar
Desertnate Desertnate is offline
Spelling Impaired
Location: St Louis
 
Join Date: Mar 2002
Posts: 5,598
Mein Auto: '10 Mazda3 HB
Quote:
Originally Posted by PhilK
actually, costco does put these green stem cap valves on the new tires they have.
Uhhh...why? I can't for the life of me figure out why you would need bright green stems and caps.

Pretty nasty from a cosmetic stand point.
__________________
"In the long history of the world, only a few generations have been granted the role of defending freedom in its hour of maximum danger. I do not shrink from the responsibility...I welcome it!" - JFK
Reply With Quote
  #12  
Old 10-26-2004, 12:06 PM
Kaz's Avatar
Kaz Kaz is offline
King of Rear Clunks
Location: OC, CA
 
Join Date: Dec 2001
Posts: 12,915
Mein Auto: 01 325iT, 88 M6
Hmm, mystery possibly solved, then. I'll have to swing by one of the local Costcos to verify.
__________________
2001 325i Touring Alpinweiss/Anthracite cloth, Alpina Softline
1988 M6 Royalblau/Silbergrau Nappa
Reply With Quote
  #13  
Old 10-26-2004, 12:28 PM
Raffi's Avatar
Raffi Raffi is offline
Hi
Location: L.A.
 
Join Date: May 2002
Posts: 4,483
Mein Auto: Frankenstein monster
I saw one in person on Saturday - on a G35.
__________________
'01 330ci
Reply With Quote
  #14  
Old 12-20-2008, 01:15 PM
tungsten2k tungsten2k is offline
Registered User
Location: sf bay area
 
Join Date: Nov 2006
Posts: 2
Mein Auto: E36 M3
stumbled across this thread searching for something else, but:

green cap = nitrogen filled tire

+

shop guy has shiny new chrome caps
Reply With Quote
  #15  
Old 12-20-2008, 10:34 PM
Test_Engineer's Avatar
Test_Engineer Test_Engineer is offline
Drives cars for a living!
Location: Ann Arbor, MI (USA)
 
Join Date: Sep 2004
Posts: 3,935
Mein Auto: 2011 BMW 335i
Quote:
Originally Posted by tungsten2k View Post
stumbled across this thread searching for something else, but:

green cap = nitrogen filled tire

+

shop guy has shiny new chrome caps
That is correct. Green cap means that the tire is filled with nitrogen.
Reply With Quote
  #16  
Old 12-21-2008, 03:07 PM
Jever's Avatar
Jever Jever is offline
call me darkcloud
Location: undisclosed secret location
 
Join Date: Apr 2003
Posts: 43,125
Send a message via ICQ to Jever Send a message via AIM to Jever Send a message via MSN to Jever Send a message via Yahoo to Jever
Mein Auto: .
Quote:
Originally Posted by Test_Engineer View Post
That is correct. Green cap means that the tire is filled with nitrogen.
I'm sure this has been answered before but why nitrogen? I can't imagine it lessening too much weight can it?
__________________
-Capitalization is the difference between "I had to help my uncle Jack off a horse.." and "I had to help my uncle jack off a horse..

Beauty is in the eye of the beer holder
Reply With Quote
  #17  
Old 12-21-2008, 03:10 PM
Lanc3r Lanc3r is offline
Banned
 
Join Date: Sep 2004
Posts: 1
Mein Auto:
Quote:
Originally Posted by teh_jev View Post
I'm sure this has been answered before but why nitrogen? I can't imagine it lessening too much weight can it?
Pressures dont fluctuate with temp.
Reply With Quote
  #18  
Old 12-21-2008, 03:11 PM
Jever's Avatar
Jever Jever is offline
call me darkcloud
Location: undisclosed secret location
 
Join Date: Apr 2003
Posts: 43,125
Send a message via ICQ to Jever Send a message via AIM to Jever Send a message via MSN to Jever Send a message via Yahoo to Jever
Mein Auto: .
Quote:
Originally Posted by Lanc3r View Post
Pressures dont fluctuate with temp.
I never thought of that. Thanks man.
__________________
-Capitalization is the difference between "I had to help my uncle Jack off a horse.." and "I had to help my uncle jack off a horse..

Beauty is in the eye of the beer holder
Reply With Quote
  #19  
Old 12-21-2008, 03:22 PM
TerraPhantm TerraPhantm is offline
Officially Welcomed to the 'Fest
Location: State College, PA
 
Join Date: Nov 2004
Posts: 1,879
Mein Auto: 2005 M3 Coupe
Quote:
Originally Posted by Lanc3r View Post
Pressures dont fluctuate with temp.
That doesn't really make sense to me, assuming the volume and number of molecules are constant, pressure and temperature are directly proportional. I could understand the pressures fluctuating less compared to "regular" air when applying the Van der Waals equation, but that doesn't mean the pressure doesn't fluctuate.
Reply With Quote
  #20  
Old 12-21-2008, 03:27 PM
Lanc3r Lanc3r is offline
Banned
 
Join Date: Sep 2004
Posts: 1
Mein Auto:
Quote:
Originally Posted by TerraPhantm View Post
That doesn't really make sense to me, assuming the volume and number of molecules are constant, pressure and temperature are directly proportional. I could understand the pressures fluctuating less compared to "regular" air when applying the Van der Waals equation, but that doesn't mean the pressure doesn't fluctuate.
Upon Googling the claim is that Nitrogen bleeds through rubber at a slower rate the O2, so the tire pressures are maintained longer. My OP is apparantly wrong.
Reply With Quote
  #21  
Old 12-21-2008, 06:10 PM
milobloom242's Avatar
milobloom242 milobloom242 is offline
gashlycrumb
Location: CA
 
Join Date: Dec 2004
Posts: 2,553
Mein Auto: 325i
Quote:
Originally Posted by Lanc3r View Post
Upon Googling the claim is that Nitrogen bleeds through rubber at a slower rate the O2, so the tire pressures are maintained longer. My OP is apparantly wrong.
the N2 molecule is larger than O2 molecule, which could explain the slower bleed rate
Reply With Quote
  #22  
Old 01-07-2009, 07:36 AM
Test_Engineer's Avatar
Test_Engineer Test_Engineer is offline
Drives cars for a living!
Location: Ann Arbor, MI (USA)
 
Join Date: Sep 2004
Posts: 3,935
Mein Auto: 2011 BMW 335i
Quote:
Originally Posted by teh_jev View Post
I'm sure this has been answered before but why nitrogen? I can't imagine it lessening too much weight can it?
If you read enough technical opinions on it, you will find rather quickly that it is the newest snake oil product of the auto industry. If someone wants, I will go into detail, but most of it is very technical and it proves Nitrogen filling on a passenger car is complete BS.
Reply With Quote
  #23  
Old 01-07-2009, 07:40 AM
obmd1's Avatar
obmd1 obmd1 is offline
only one screen name
Location: location location
 
Join Date: Jan 2005
Posts: 8,150
Send a message via AIM to obmd1
Mein Auto: '14 X5 35D
Quote:
Originally Posted by Test_Engineer View Post
If you read enough technical opinions on it, you will find rather quickly that it is the newest snake oil product of the auto industry. If someone wants, I will go into detail, but most of it is very technical and it proves Nitrogen filling on a passenger car is complete BS.
but it does explain why Discount Tire put those ugly green things on the wife's car.
Reply With Quote
  #24  
Old 01-07-2009, 07:41 AM
dboy11 dboy11 is offline
Officially Welcomed to the 'Fest
Location: Sonoma County CA
 
Join Date: Mar 2006
Posts: 6,664
Mein Auto: 99...540i
Quote:
Originally Posted by milobloom242 View Post
the N2 molecule is larger than O2 molecule, which could explain the slower bleed rate
This was how it was explained to me..
__________________


Its Going To Cost How Much???????
Reply With Quote
  #25  
Old 01-07-2009, 08:35 PM
rehostman rehostman is offline
Officially Welcomed to the 'Fest
Location: Montréal, Québec, Canada
 
Join Date: Feb 2008
Posts: 648
Mein Auto: 2007 X5 4.8i, 2009 E90 M3
My winter tires were filled with nitrogen and the technician told me the green valve stem caps were green for this reason. He also mentioned that the tires would lose pressure less rapidly with nitrogen, for what it's worth.
__________________

Patrice
2009 E90 M3 Melbourne Red on Black Leather
2007 X5 4.8i Monaco Blue on Saddle Brown
Reply With Quote
Reply

Bookmarks


Forum Navigation
Go Back   Bimmerfest - BMW Forums > Everything Else > General Automotive Forum
Today's Posts Search
Thread Tools
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 On



Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
Stolen Valve Stem Caps & Little Punks Ack 3 Series / 4 Series 42 06-10-2004 10:56 AM
Did '02 M3s Come with M Logo Valve Stem Caps? Zappo M Series 4 11-17-2003 10:02 AM
DAMN!!! Valve caps stolen Mathew Off-Topic 26 08-09-2003 02:57 AM
Lets mount some tires (valve stem install tool) Ron Stygar E36/7 Z3 (1996-2002) 13 05-05-2003 10:17 AM
who needs bmw valve caps when you can have these eugeneDC/TX Off-Topic 1 02-22-2002 04:57 AM


All times are GMT -7. The time now is 12:04 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
© 2001-2011 performanceIX, Inc. All Rights Reserved .: guidelines .:. privacy .:. terms