Help please - Tyre losing pressure - can't find the leak.
08-05-2008, 04:31 AM
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Hi all
My tyre pressure warning light came on yesterday morning, and I worked out that it's a slow puncture on the nearside rear. (I have 19's - not run flats).
Measured how bad it was - and I am losing about 4 psi overnight.
Took the car to a tyre dealers, and they got the tyre off the car, and sprinkled water around the whole tyre (shoulder and tread), and also along the inside of the rim to check for any leaks.
They were unable to find anything. No leaks that they could see. I was watching over them while they tried to do this.
Are there any more sophisticated methods for finding leaks that anyone can suggest.
Any other ideas, short of getting a new tyre ??
Thanks.
My tyre pressure warning light came on yesterday morning, and I worked out that it's a slow puncture on the nearside rear. (I have 19's - not run flats).
Measured how bad it was - and I am losing about 4 psi overnight.
Took the car to a tyre dealers, and they got the tyre off the car, and sprinkled water around the whole tyre (shoulder and tread), and also along the inside of the rim to check for any leaks.
They were unable to find anything. No leaks that they could see. I was watching over them while they tried to do this.
Are there any more sophisticated methods for finding leaks that anyone can suggest.
Any other ideas, short of getting a new tyre ??
Thanks.
08-05-2008, 04:38 AM
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Actually what they probably used was a solution of dish soap and water that
will produce bubbles at the leak. The only other method I know of is when they submerge
it in a tub of water and watch for the leaks.
will produce bubbles at the leak. The only other method I know of is when they submerge
it in a tub of water and watch for the leaks.
08-05-2008, 04:47 AM
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My Ride: 535d Sport Saloon / Carbon Black / E-maps re-map / 20" Vortex R alloys - carbon black / Pro-Nav / Vis pack / heated leather / enough for now /
I had something liike this once - it turned out to be a split valve stem - the best sort of "puncture" to get!
08-05-2008, 05:00 AM
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Originally Posted by jonno_' post='639992' date='Aug 5 2008, 01:47 PM
I had something liike this once - it turned out to be a split valve stem - the best sort of "puncture" to get!
08-05-2008, 05:14 AM
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My Ride: 535d Sport Saloon / Carbon Black / E-maps re-map / 20" Vortex R alloys - carbon black / Pro-Nav / Vis pack / heated leather / enough for now /
It wasn't until I tried to re-inflate the tyre that I noticed the split (and felt the air on my hand), though it should show up clearly in an immersion test too.
I'd try a second tyre specialist and get them to remove wheel and test the tyre "in situ" just in case of alloy problems.
GL getting it sorted.
I'd try a second tyre specialist and get them to remove wheel and test the tyre "in situ" just in case of alloy problems.
GL getting it sorted.
08-05-2008, 06:04 AM
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I concur with the above, an immersion test is the only way to identify a slow leak, it could be from the valve or the rim seating etc, get it in a paddling pool for a few hours and have a look and see for yourself.
08-05-2008, 06:16 AM
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Originally Posted by chris f' post='640022' date='Aug 5 2008, 03:04 PM
I concur with the above, an immersion test is the only way to identify a slow leak, it could be from the valve or the rim seating etc, get it in a paddling pool for a few hours and have a look and see for yourself.
08-05-2008, 06:17 AM
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My Ride: 2007 530i. Purchased 6/28/07. Titanium Silver Metallic, Black Dakota Leather, Dark Poplar Trim, Steptronic, Premium Package, Cold Weather Package, Bluetooth, Adaptive Control Xenons. 10/30/07 Added OEM 124s with 245/40/18 & 275/35/18 Michelin Pilot Sport A/S tires. Installed red Cal Covers� from BavAuto. 11/21/07 Added OEM all-weather floor mats (for winter, carpet in summer) and coat rack. 6/26/08 installed M5-style rear spoiler. 6/30/08 put on red reflectors. 8/22/08 Euro turn signal stickers applied. 3/20/09 Installed Shadowline Trim. 3/27/09 Added Matte Black Kidney Grilles from Trinity. 4/03/09 Installed Bimmian Shadow Matte Black 530i Badges. 4/04/09 Installed LED license plate lights from Trinity. 5/01/09 Installed Brabus Interior LED Kit and White Angel Eyes. 5/02/09 Put in Brabus 6K Fogs. 5/14/09 Removed charcoal filter. 5/15/09 Installed light smoke LED side marker lamps from Trinity. 5/21/09 Sprint Booster. 6/12/09 Painted exhaust tips flat black. 6/13/09 Pulled red Cal Covers and painted calipers low gloss black. 6/27/09 RPI Ram Air Scoop from Trinity. 8/15/09 Installed Brabus's silver invisibulbs front and rear. 9/24/09 Installed R-Dash license plate LEDs from Brabaus (John).
Poor seating of the tire's bead against the wheel's inner rim might be the case, but unlikely if it has been mounted for a while. Another possibility is that of a cracked wheel. Best of luck.
08-05-2008, 06:38 AM
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Originally Posted by CWS530' post='640029' date='Aug 5 2008, 03:17 PM
Poor seating of the tire's bead against the wheel's inner rim might be the case, but unlikely if it has been mounted for a while. Another possibility is that of a cracked wheel. Best of luck.
Can a crack be repaired ??
08-05-2008, 06:43 AM
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best way to detect it is just take off the wheel and poor a mixture of soap and water on it.you will easily see bubbles appearing in the leaking area.