air leak with no puntures??

burningchicken · 09-08-2010, 03:17 PM

My idrive system tells me at least once every couple of days that my driverside back tire is low. And when I check, it is about 20-25psi every time. I put in air to the recommended nonsport 33psi. I took it to get looked at last weekend, but they could not find any leak in the tire. It still has decent tread left in the tire. Should I just buy a new tire? Any suggestions?

VMRWheels · 09-08-2010, 03:41 PM

Quote:

Originally Posted by burningchicken

My idrive system tells me at least once every couple of days that my driverside back tire is low. And when I check, it is about 20-25psi every time. I put in air to the recommended nonsport 33psi. I took it to get looked at last weekend, but they could not find any leak in the tire. It still has decent tread left in the tire. Should I just buy a new tire? Any suggestions?

Have you done a dunk test? Check the valve stem for leaks? The valve stems are usually the main coperate.

-Charles@VMRWheels

Coolieman1220 · 09-08-2010, 09:48 PM

+1 Valve Stems

lucas.kent · 09-08-2010, 09:50 PM

+2 on wheel stems. Also, are you sure the rim isn't bent? That could possibly be a problem too.

burningchicken · 09-10-2010, 09:50 AM

I got my valves checked and they tightened the one I was having trouble with. After a while I got the warning again on my idrive, so im just going to replace the tire. Thanks for the help guys!

onebadmofo · 09-10-2010, 09:55 AM

Rim could be cracked too.
Take the wheel off, put some soapy water in a spray bottle, spray the wheel and look for bubbles.

Mr. ///M3 RD · 09-10-2010, 09:56 AM

Examine your wheel carefully on the outer inside rim. You may have a crack and therefore a slow leak. I had a RFT flat and it was due to a crack in my rear wheel outer rim (That be the outside diameter you can see from the inside - opposite of the spokes, that be the weakest link on your wheels).

When they check your wheel have a close look there.

Mine deflated over night when I think I parked right on the crack and the crack opened up and let the air escape.

VMRWheels · 09-10-2010, 02:10 PM

Quote:

Originally Posted by burningchicken

I got my valves checked and they tightened the one I was having trouble with. After a while I got the warning again on my idrive, so im just going to replace the tire. Thanks for the help guys!

You could have a small bend in the wheel, hairline crack, or pin hole leak. The easiest way to find out is doing a full dunk test in water. It may not even be the tire you plan on replacing and it might be the wheel. I would recommend this method first before spending any money.

-Charles@VMRWheels

09-08-2010, 03:17 PM	#1
burningchicken Lieutenant 26 Rep 438 Posts Drives: 2007 e90 335i Join Date: Jan 2010 Location: noVA, Virginia Tech iTrader: (5)	air leak with no puntures?? My idrive system tells me at least once every couple of days that my driverside back tire is low. And when I check, it is about 20-25psi every time. I put in air to the recommended nonsport 33psi. I took it to get looked at last weekend, but they could not find any leak in the tire. It still has decent tread left in the tire. Should I just buy a new tire? Any suggestions?
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09-08-2010, 09:48 PM	#3
Coolieman1220 Banned 73 Rep 1,770 Posts Drives: 2010 335d Join Date: Jul 2010 Location: New York City iTrader: (0)	+1 Valve Stems
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09-08-2010, 09:50 PM	#4
lucas.kent Major 143 Rep 1,173 Posts Drives: M3 Join Date: Aug 2005 Location: AZ iTrader: (2) Garage List 2016 BMW M3 [0.00]	+2 on wheel stems. Also, are you sure the rim isn't bent? That could possibly be a problem too.
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09-10-2010, 09:50 AM	#5
burningchicken Lieutenant 26 Rep 438 Posts Drives: 2007 e90 335i Join Date: Jan 2010 Location: noVA, Virginia Tech iTrader: (5)	I got my valves checked and they tightened the one I was having trouble with. After a while I got the warning again on my idrive, so im just going to replace the tire. Thanks for the help guys!
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09-10-2010, 09:55 AM	#6
onebadmofo Colonel 346 Rep 2,396 Posts Drives: 2008 E90 M3 Join Date: Aug 2010 Location: Central NJ iTrader: (14)	Rim could be cracked too. Take the wheel off, put some soapy water in a spray bottle, spray the wheel and look for bubbles.
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09-10-2010, 09:56 AM	#7
Mr. ///M3 RD Happy Camper 613 Rep 7,869 Posts Drives: C63 AMG & 280 SL on Weekends : Join Date: May 2010 Location: GTA, Ontario - Canada iTrader: (0) Garage List 1969 Restored Merce ... [7.50] 2011 M3 Coupe TRADED [7.34] 1987 BMW 535is [1.00] Cars from the Past [6.50] The ///M3 Engine S65 [9.59]	Examine your wheel carefully on the outer inside rim. You may have a crack and therefore a slow leak. I had a RFT flat and it was due to a crack in my rear wheel outer rim (That be the outside diameter you can see from the inside - opposite of the spokes, that be the weakest link on your wheels). When they check your wheel have a close look there. Mine deflated over night when I think I parked right on the crack and the crack opened up and let the air escape. __________________ Cheers, Rolf-Dieter Life will take us to some interesting places, fortunately The ///M3 will too with a many of us know this very well, now my C6.3 AMG with 487 HP does it too ---> Click here for some good stuff I found
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