Go Back   Team-BHP > Under the Hood > Modifications & Accessories > Tyre & Alloy wheel Section


Reply
 
Thread Tools Search this Thread
Old 3rd April 2008, 14:11   #1
BHPian
 
vishnuvijay's Avatar
 
Join Date: Apr 2007
Location: Cochin
Posts: 173
Thanked: 0 Times
Default Tyre losing air pressure & fast!

one of my Kumho Ecsta AST KU25 tubeless trye is loosing air pressure very fast. i corrected the air pressure to 30 psi and 2 days later i found it to be 11 psi. filled in air again, the guy at the ioc pump said there is no leakage.

went on a trip (300 km (first day) + 300 km (second day) ) checking air pressure in between and found it not to be decreasing. came back home and the next day ( again 2 days passed since i last filled it) found that a good amount of air has escaped.

is it a puncture or is there something else wrong.
vishnuvijay is offline   Reply With Quote
Old 3rd April 2008, 14:17   #2
Team-BHP Support
 
bblost's Avatar
 
Join Date: Jul 2007
Location: Hyderabad
Posts: 9,650
Thanked: 6,662 Times
Default

check for young kids, old disgruntled men, ex lovers around your car.
bblost is offline   Reply With Quote
Old 3rd April 2008, 14:22   #3
Distinguished - BHPian
 
condor's Avatar
 
Join Date: Jun 2006
Location: Speed-brkr City
Posts: 10,738
Thanked: 4,316 Times
Default

Possibly a flat tyre. Get it fixed.
condor is offline   Reply With Quote
Old 3rd April 2008, 14:25   #4
Senior - BHPian
 
headers's Avatar
 
Join Date: May 2006
Location: Greater Chennai
Posts: 4,589
Thanked: 454 Times
Default

Quote:
Originally Posted by vishnuvijay View Post
one of my Kumho Ecsta AST KU25 tubeless trye is loosing air pressure very fast. i corrected the air pressure to 30 psi and 2 days later i found it to be 11 psi. filled in air again, the guy at the ioc pump said there is no leakage.

went on a trip (300 km (first day) + 300 km (second day) ) checking air pressure in between and found it not to be decreasing. came back home and the next day ( again 2 days passed since i last filled it) found that a good amount of air has escaped.

is it a puncture or is there something else wrong.

Could be that the tubeless valve is leaking.. or you could have a small puncture.. fill air to 5 psi more than normal and drive to a tubeless repair shop to get them check.. I'd suspect the valve..
headers is offline   Reply With Quote
Old 3rd April 2008, 14:27   #5
Senior - BHPian
 
kpzen's Avatar
 
Join Date: Oct 2004
Location: Faridabad
Posts: 5,545
Thanked: 1,598 Times
Default

I agree with headers. I also suspect a leaking valve.
kpzen is offline   Reply With Quote
Old 3rd April 2008, 14:28   #6
Senior - BHPian
 
iraghava's Avatar
 
Join Date: Oct 2005
Location: Bhaiyyaland
Posts: 8,028
Thanked: 153 Times
Default

Should in all probability be a puncture in the tread. Valve is also a possibility but less so since this can be detected by the pump attendant quite easily.
iraghava is offline   Reply With Quote
Old 3rd April 2008, 14:31   #7
Senior - BHPian
 
bottle's Avatar
 
Join Date: Sep 2006
Location: Chennai
Posts: 1,489
Thanked: 133 Times
Default

i had this problem with a faulty vavle on a new tyre.. get it checked

when they put the tyre under water you would get a bubble now and then.. so it was slowly leaking air
bottle is offline   Reply With Quote
Old 3rd April 2008, 14:32   #8
Team-BHP Support
 
Jaggu's Avatar
 
Join Date: May 2004
Location: Bangalore
Posts: 17,748
Thanked: 7,466 Times
Default

Check valve, also check the edges of the valve where it rests on the rim. Then move on to inspect the tyre for any nail/iron piece etc.
Jaggu is online now   Reply With Quote
Old 3rd April 2008, 14:48   #9
Senior - BHPian
 
Join Date: Dec 2007
Location: Dubai
Posts: 3,860
Thanked: 128 Times
Default

when i fitted the tubeless had the same issue with a type. it was losing pressure on a regular basis. but it was on a scale of 3~5 psi in a week. When checked it was a faulty valve.

After replacing that had no issue so far.

Would suggest a quick visit to the tyre store. Faulty valve or puncture - it will be fixed and you will have some peace of mind.
HappyWheels is offline   Reply With Quote
Old 3rd April 2008, 15:35   #10
Senior - BHPian
 
spadival's Avatar
 
Join Date: Oct 2004
Location: Dayton, OH
Posts: 1,770
Thanked: 15 Times
Default

You'll probably see a 2 inch nail embedded in the tyre. I had 3 nails embedded in my tyre before it started losing air!!
spadival is offline   Reply With Quote
Old 3rd April 2008, 17:15   #11
BHPian
 
vishnuvijay's Avatar
 
Join Date: Apr 2007
Location: Cochin
Posts: 173
Thanked: 0 Times
Default

thank you guys for replying.

the guy at the ioc pump said there is no valve leak. i din't check for any nails. anyways i'll get it checked at a good tyre shop this weekend when i go home.
vishnuvijay is offline   Reply With Quote
Old 3rd April 2008, 19:27   #12
Team-BHP Support
 
tsk1979's Avatar
 
Join Date: Feb 2005
Location: New Delhi
Posts: 22,953
Thanked: 15,645 Times
Default

I had a similar problem when the car had potenza.
Got it checked at the pump and even at the tire repair shop.
Immersing in water also did not show bubbles and I was in a fix. Then while checking the guy accidently bent the valve towards the right, and we saw bubbles near the valve stem. This used to happen only when the valve stem was bent in a particular direction.
changed the valve and the problem went away.
The leak was not from the top of the valve(what pump guys check), but near the stem, where the valve goes into the tire.
tsk1979 is offline   Reply With Quote
Old 3rd April 2008, 20:44   #13
Senior - BHPian
 
Join Date: Dec 2007
Location: Dubai
Posts: 3,860
Thanked: 128 Times
Default

Quote:
Originally Posted by tsk1979 View Post
... The leak was not from the top of the valve(what pump guys check), but near the stem, where the valve goes into the tire.
Exactly the same problem that I faced! The base was having a leak!
HappyWheels is offline   Reply With Quote
Old 3rd April 2008, 21:22   #14
Senior - BHPian
 
headers's Avatar
 
Join Date: May 2006
Location: Greater Chennai
Posts: 4,589
Thanked: 454 Times
Default

Quote:
Originally Posted by iraghava View Post
Should in all probability be a puncture in the tread. Valve is also a possibility but less so since this can be detected by the pump attendant quite easily.
Boss..i'd doubt a pump attendant diagnosing a valve leak! We are not in your esteemed company you see

Quote:
Originally Posted by vishnuvijay View Post
thank you guys for replying.

the guy at the ioc pump said there is no valve leak. i din't check for any nails. anyways i'll get it checked at a good tyre shop this weekend when i go home.
How did the pump guy check the valve leak?

Quote:
Originally Posted by tsk1979 View Post
I had a similar problem when the car had potenza.
Got it checked at the pump and even at the tire repair shop.
Immersing in water also did not show bubbles and I was in a fix. Then while checking the guy accidently bent the valve towards the right, and we saw bubbles near the valve stem. This used to happen only when the valve stem was bent in a particular direction.
changed the valve and the problem went away.
The leak was not from the top of the valve(what pump guys check), but near the stem, where the valve goes into the tire.
This is exactly the weak point.. I've had the same in my Indica. And only good / experienced tyre guys will find the problem!

Quote:
Originally Posted by HappyWheels View Post
Exactly the same problem that I faced! The base was having a leak!

The tubeless tyre valves have to be seated properly on the rim, else this leak will happen. Also corrosion in the area can tear the valve seats.

Just my 1 paisa!!
headers is offline   Reply With Quote
Old 3rd April 2008, 21:48   #15
Team-BHP Support
 
tsk1979's Avatar
 
Join Date: Feb 2005
Location: New Delhi
Posts: 22,953
Thanked: 15,645 Times
Default

@headers, if the leak is from the top of the valve it is detectable as the pump attendents often put saliva on it after filling in air(I know its sounds gross, but thats how I have seen it being done).
But when the leak is from the bottom stem ... You need an expert.
tsk1979 is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search


Similar Threads
Thread Thread Starter Forum Replies Last Post
The 'Actual' Tyre Pressure : Is Atmospheric Pressure Counted? sr_1445 Technical Stuff 2 16th January 2014 11:05
Losing air pressure on my optra stock steel rims mdesai_1981 Tyre & Alloy wheel Section 0 8th September 2008 00:55
How fast....How fast? sri Street Experiences 10 16th July 2007 18:58
Losing the air between RIM and tyre, is this possible? Laxminarayan Street Experiences 14 17th January 2007 17:11


All times are GMT +5.5. The time now is 06:15.

Copyright 2000 - 2017, Team-BHP.com
Proudly powered by E2E Networks