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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 3 Series / 4 Series > E90/E91/E92/E93 (2006 - 2013)

E90/E91/E92/E93 (2006 - 2013)
The E9X is the 4th evolution of the BMW 3 series including a highly tuned twin turbo 335i variant pushing out 300hp and 300 ft. lbs. of torque. BMW continues to show that it sets the bar for true driving performance! -- View the E9X Wiki

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  #1  
Old 03-26-2013, 02:06 PM
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RFT Puncture

I think I have a puncture... one front tire pressure dropped to under 200psi this morning

Will get it fixed asap... a real pain
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Last edited by SilverX3; 03-26-2013 at 02:25 PM.
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  #2  
Old 03-26-2013, 02:11 PM
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///M-ratedE90 ///M-ratedE90 is offline
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Quote:
Originally Posted by SilverX3 View Post
I think I have a puncture... one frotn tire pressure dropped to under 200psi this morning

Will get it fixed asap... a real pain


It is an achievement to get the tire pressure that high in the first place without it bursting! Well done!
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  #3  
Old 03-26-2013, 02:30 PM
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sorry I emant under 200 Minibar
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Old 03-26-2013, 02:53 PM
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Ah ... hitting the mini bar again .... that could be the problem ....
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  #5  
Old 03-26-2013, 06:14 PM
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milibar

or whatever
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  #6  
Old 03-26-2013, 10:24 PM
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pointandgo pointandgo is offline
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milibar

or whatever
For tire air pressure, we in the U.S. only understand "PSI." Everthing else is foreign.
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Old 03-26-2013, 10:40 PM
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pointandgo pointandgo is offline
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Originally Posted by SilverX3 View Post
I think I have a puncture... one front tire pressure dropped to under 200psi this morning

Will get it fixed asap... a real pain
I can empathize...my tire dropped to 2.0 furlongs per fortnight yesterday (21 psi)...it's an excruciating "conversion" to "psi" - pounds per square inch...but this is payback for your attempt to confuse us with Australian "metric" systems.
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  #8  
Old 03-27-2013, 01:18 AM
jadatis jadatis is offline
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Could also be that you hit a pavement side ( you see I am also not from America), wich opened the rimm tire contact a short while.
Yust pump it up and see if it stays at pressure.
Could be you have to reset the TPMS .

But its 2.0 bar/ about 29 psi/ 200 kPa ( kiloPascal).
In millibar it would bee 2000.
So now enaugh about the miswriting
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I live in Holland and once got hold of the system the tire- and car manufacturers use to determine the advice-pressure for cars. Learned myself Excell to make spreadsheets for it.
Next link leads to map with spreadsheets to re-calculate advice pressures for non-OEM tires, or to check the original.
http://cid-a526e0eee092e6dc.office.l...0tyre-pressure
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  #9  
Old 03-27-2013, 03:00 AM
hondo402000 hondo402000 is offline
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well take the wheel off, and look at the tire and see if you find a nail or screw stuck in the tire, but get a tire puncture repair kit first, if you find a nail, pull it out and stick a plug in it, then spray the plug with some soapy water and if you see no bubbles, then you have fixed the puncture, then pump the tire up.

Easy
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  #10  
Old 03-27-2013, 11:57 AM
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Turned out to be a low pressure .... dropped under 220 Kpa while the other tire is at 280...., pumped up yesterday...... Overnight still good....
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  #11  
Old 03-27-2013, 04:12 PM
Red bull Red bull is offline
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My tires have 36psi. Nitro.
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  #12  
Old 03-27-2013, 04:32 PM
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My tires have 36psi. Nitro.
78% or did you go full pure?
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  #13  
Old 03-27-2013, 05:03 PM
Red bull Red bull is offline
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Pure baby all the way.
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  #14  
Old 03-27-2013, 05:55 PM
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I fill my with Helium... makes the car float when driving
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  #15  
Old 03-28-2013, 05:58 AM
e92josh e92josh is offline
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my sensor literally fell off in the tire the other day, SMH.
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  #16  
Old 03-28-2013, 08:54 AM
gpburdell gpburdell is offline
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Pure baby all the way.
How do they get all the 78% mix *out* of the tire in order to ensure it's really filled with 100% N2?
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  #17  
Old 03-28-2013, 09:24 AM
Red bull Red bull is offline
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Deflate tire , then fill with nitro.
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  #18  
Old 03-28-2013, 10:39 AM
ard ard is offline
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Brilliant replies on the N2...

it is a scam, and most knowledgeable folks know this. The nitrogen concentrators at the tire store actually only get to 94%..so 78 to 94. And all those 'benefits'? Utter fabrications and extensions. (Unless you are using bottled N2, 99.99 technical pure, and have filled and flushed 3x)

The 'why'? To sell people something at the brick and mortar store to counter the squeezing of profits due to internet tire sales.
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Old 03-28-2013, 01:09 PM
gpburdell gpburdell is offline
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Deflate tire , then fill with nitro.
Even deflated you're still looking at a tire filled with air.
*shrug* If you're happy with it, that's fine.
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  #20  
Old 03-28-2013, 02:29 PM
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Nitro particles are bigger than air ... it won't escape through small cracks / valves... hence it stays in your tires longer.... however it's not free .... tire shop charges $2 to inflate
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  #21  
Old 03-28-2013, 05:55 PM
ard ard is offline
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Nitro particles are bigger than air ... it won't escape through small cracks / valves... hence it stays in your tires longer.... however it's not free .... tire shop charges $2 to inflate
That is an oft-repeated factoid that means nothing...The covalent radius and van der Waals radius are marginally larger on nitrogen (71, vs 66pm and 155 vs 153pm)... and the permeability of rubber is marginally lower for N2. (not that is pure sheet rubber, not vulcanized tires.) Hence this factoid. But in actual practice this difference is small and is not material. Recognize that "pm" is Pico Meter, or 10E-12 or one BILLIONTH of a millimeter.

The truth is that engineers and physicists have debunked this, yet it persists due to vendors pumping this product... And dumb****s with $$ to spend thinking the green valve stems make them 'special'.

You need to check tire pressures anyway, no matter what you put in them. Does checking every 58 days instead of every two months make a difference?

Now someone needs to say "Nitrogen doesnt expand like regular air, which is why race cars use it" ...so we can debunk that nonsense.

And again, tire stores only sell 94% "pure" nitrogen
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  #22  
Old 03-28-2013, 06:54 PM
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Are you a scientist ?
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