tyre valve leak

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Kaijun

Active Member
Posts
238
Location
Berkshire, U. K.
After I inflated tyres for my landy at a petrol station, I was hearing air hissing from one of the tyres, I could feel air pressure from its valve, anyway I drove home. Is it possible to fix it simply by myself or have tyre shop to check it, Thanks!
 
Either you need a new valve, or the valve's outer is not seated properly on the wheel.
A tyre place will probably fix this for not much money!
 
Kaijun said:
Thanks Stanleysteamer, do you mean a valve remover can do this job? What do you mean by tyre place?
Click to expand...
You need to get hold of or make a valve removing tool, a pair of strong tweezers or a fine needle nose pliers should do the job. Just use them to take hold of the valve inside the thicker black rubber outer and unwind it anti-clockwise. The tyre will deflate obviously. Then replace it with a good one.
But, if the thing that holds the valve is not properly seated you may have to take it to a place that fits new tyres to get them to hoick it out and replace it with a new one and a valve.
But before you do any of this make sure that it isn't simply a question of a loose valve. Find or make up a tool to tighten it up inside the valve holder/outer. that may be all the problem is.
Also make sure that the tyre isn't just deflating because the wheel is corroded near the valve and the tyre rim is not seating properly on the wheel.
This is very common with aluminium wheels and you may have to take the wheel to a tyre place where they will remove the tyre, clean up the inside of the rim and then replace it. Cost is peanuts. I end up doing this about once every two years with one wheel or another.
 
If you put some more air in, given its leaked a load out, you might find it reseats itself. If not, press the middle of the valve down with a poking device and that might sort it. If not, the valve core will need to come out as explained above
 
Kaijun said:
I just tried a thin clipper, the hissing became weak, it seems the valve is loose.
Click to expand...
Great!
When I went to get some new ones, the tyre place I regularly use gave me a handful of the ones they take off whenever they put a new tyre on, for nothing. So if you try this you may be lucky.
Of course there is always the possibility that there is a piece of foreign matter either in the valve or in its seat.
 
I bought a valve tool from halfords and got a valve from other tyre for time being. After I screwed up tightly and inflated, it had no air hissing, I checked other three tyres, there were about 2 turns to tighten up. Should I tighten or leave one or two turns?
 
kermit_rr said:
That's why using something to push the valve down further than normal can help, bigger valve opening to let it blow through
Click to expand...
Yep, got that, but if it is a persistent beggar, or too big to get through the gap....;)
Conversely, giving it another blast from the tye inflator, perhaps with the valve at the bottom of the wheel, may blow the foreign object back into the tyre. to come out again later!;)
 
Kaijun said:
I bought a valve tool from halfords and got a valve from other tyre for time being. After I screwed up tightly and inflated, it had no air hissing, I checked other three tyres, there were about 2 turns to tighten up. Should I tighten or leave one or two turns?
Click to expand...
As a general rule, tighten right up then undo 1/4 to 1/2 a turn i'd say. Any others with different views?
Looks as if it was a foreign object, or a dodgy valve. Pleased you've solved it!
(My tyre pressure gauge has a black plastic thing on it which can be used to open and close the valves so they don't need to be done up very tight!)
:):):)
 
I change my own tyres, so am taking valve cores out all the time.
When i put them back in, screw in until you meet resistance, then 1/8-1/4 of a turn so the rubber seats nicely without over doing it
 
kermit_rr said:
I change my own tyres, so am taking valve cores out all the time.
When i put them back in, screw in until you meet resistance, then 1/8-1/4 of a turn so the rubber seats nicely without over doing it
Click to expand...
Well that's me told! Thanks for the words from a pro!:):):)
(Although it prolly would come to much the same. Depends on what you/I/ anyone else mean by "tight"!)
 
If valve is not tightened, I wonder it could become loose later. I found my tyres have more or less air leaking after three months or longer. Maybe loose two turns explains it.
 
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