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The Tire Rack's Tire & Wheel Forum
Use this forum to discuss anything in relation to wheels to tires to offsets.
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Old 04-25-2010, 05:05 PM   #1
KtecR
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BBS CH losing air - use sealant?

Two of my 19" BBS CH wheels (front right and back left) consistently lose air. The front right has been losing around 10psi per 3-4 weeks for the past 6 months and the back rear loses more like 20psi per 2 weeks for the past 2 months. It is becoming very aggravating to have to put air in every couple of weeks so I've now come to the conclusion that this has to be fixed for cheap or these wheels gotta go.

I've done the search and so far the differential is: Rim crack/bent, valve stem rubber leak, tire not seated, nail/penetration. The front right has a slight bend so that may the issue but its not a huge dent and the back seems straight. There are no nails in either tire so can't be that either. These tires have been on the wheels for about 2 years so I doubt it is the seating. I am down to valve stem rubber or the bends. Do you all think I can just use the can tire sealant to fix this problem? Are there any problems with trying this out?
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Old 04-25-2010, 05:11 PM   #2
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Take some Fantastic or 409 cleaner & spray the wheel beads & valve stem. These 2 items will bubble real easy & now you will know where your leak is. If no bubbling at either of these 2 areas, then you might have a puncture in the tread area where the object of the puncture never stayed in the tire. Now you have to spray down the whole tire. Chas
PS: Try to avoid using tire sealant. It is really for emergencies only, as it will mess with your tire balance.

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Old 04-25-2010, 06:36 PM   #3
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Fix a Flat is a nightmare for tire places. Do not use it. Take the car to a Tire Rack, have them remove the rims. Most people coat it with soap and look for cracks where the bubbles come out. Could be something you do not know about. I once had a rim that had a pin prick in it...caused a leak. Just have the best local tire shop dunk them and check for leaks. I would not imagine if these are new rims, the alloy has a leak....but can happen. Hope this helps. Should not cost you that much. Hopefully it is the tire and not the rim.
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Old 04-26-2010, 08:23 AM   #4
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Quote:
Originally Posted by carcus View Post
Fix a Flat is a nightmare for tire places. Do not use it. Take the car to a Tire Rack, have them remove the rims. Most people coat it with soap and look for cracks where the bubbles come out. Could be something you do not know about. I once had a rim that had a pin prick in it...caused a leak. Just have the best local tire shop dunk them and check for leaks. I would not imagine if these are new rims, the alloy has a leak....but can happen. Hope this helps. Should not cost you that much. Hopefully it is the tire and not the rim.
Thats exactly what I am hoping - the tire not the rim. I'll find a place as soon as I get a chance. Luckily the weather is good and the motorcycles are running good right now (knock on wood)!
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Old 04-26-2010, 11:53 AM   #5
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There are cases that rims can have a pin hole leak or a slight bend to cause leaks. The more common cause would be from the valve stem rubber, hairline crack, or bent wheel. Water or dunk test would be the easiest to determine this.

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Old 04-30-2010, 01:27 PM   #6
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Thanks for all the help guys. It turned out the wheel that could hold the air for the least amount of time (rear left) just wasnt sealed right. The guy fixed it right away in less than 5 mins. The other (front right) that held air for about 3 weeks has a crack in it :-/. Its ok though, doesn't look bad and it might be able to be fixed. Until then I am running Type 44s
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2007 KLR 650
2004 330i ZHP: AW/Gray Leather; 6spd
1996 4Runner SR5: White/Tan
1980 CB400T

Sold:
2000 328Ci: TiAg/Black Leather; 5spd
2004 M3: TiAg/Black Leather; SMG
1995 318i: Arctic Gray/Gray Leather; 5spd
1986 325es: Red/Black Cloth; 5spd
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