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[aaronjb]

I had that once when a valve core fell out .. pulled the car out of the tight single garage it was in and realised the tyre was flat, then spent the next eternity pumping it up with a foot pump (no compressor in those days!), pulled the pump back off and psssshhhhh, argh!

[Bigron]

Ugh - so I've bought a pile of poo! Ok, so we learn.....

Ron.

[Bigron]

Just a further thought; doesn't the same apply to Nige's super-expensive posh ones?

Ron.

[Entwood]

Just a further thought; doesn't the same apply to Nige's super-expensive posh ones?

Ron.

Yes, but they have a posh seal to hold the air in .. and the valve has never stuck in ... yet ... (new ones come with a fancy dust shield as well, mine being older don't have that .. )

[Bigron]

Thanks Nige: when I win the Lottery I'll go for the new version.
What are the odds on my winning if I don't do the Lottery? 

Ron.

[omega2018]

What are the odds on my winning if I don't do the Lottery? 

Ron.

funnily enough they are almost exactly the same as if you do do the lottery, give or take 0.0000071%

[omega2018]

Just a further thought; doesn't the same apply to Nige's super-expensive posh ones?

Ron.

Yes, but they have a posh seal to hold the air in .. and the valve has never stuck in ... yet ... (new ones come with a fancy dust shield as well, mine being older don't have that .. )

the cheapo ones had a good seal, that never failed (apart from the encounter with a kerb but even then the seal stayed fine it was the cap top that broke and let air out).  the only problem with them was the fact that they keep the valve core depressed 24/7 so yes i would expect the problem to apply to any that do the same, regardless of poshness.

[Entwood]

By sheer coincidence .. or bought on by you lot talking about them ... went out this morning and the monitor showed a sensor low battery warning. Bit of research and two were reporting low batteries, so decided to change all six. Not bad considering they've been on about 3 years and the book says they will last about 2 years.

However, point of the post, to change the batteries the sensors have to be removed from the tyres, and on all six the sensor came off without the valve sticking in at all. In fact when the sensors were replaced after fitting the new batteries there was absolutely no change to the reported pressure of any of the six tyres.

[Bigron]

That's good to hear, Nige, but it might be all academic after Monday's MOT!

Ron.

[robson]

I got mine today will probably put them on my trailer and continue to check car tyres as before.

[Bigron]

Mine arrived today as well and now I'm hesitant to fit them! 

Ron.

[omega2018]

just looking through my records i think mine lasted around 4 years before the valve problems showed up.  so if you change your tyres (and valves) less than that they might be fine. however I would carry an electric pump, spare valves and a valve remover tool with you just in case . 

in fact just the electric pump may suffice, i remember at least once stopping to check my tyre pressure, finding the valve stuck open, losing a lot of air, pumping it back up and very quickly putting the fancy valve cap back on to stop it all coming out.  only good as a get-me-home measure as now you are relying only on the cap to tell you the real pressure. getting the cap back on quickly while air is gushing out was difficult i think which is why i binned them in the end.

[Bigron]

If having the valve sticking open is a potential problem, would it be too stupid to suggest giving it a squirt of PTFE dry lubricant? 

Ron.

[robson]

Is it worth all this hassle? I don't think so but perhaps we have learnt a lesson

[ronnyd]

Sounds like you,re concerned enough about your MOT next week. Leave ,em off till your fears are confirmed or alleviated.