Perished Tyre valves

Discussion in 'Mech Tech' started by Gooders, Mar 17, 2019.

  1. Is this a common problem. Came to inflate a tyre on the van which had developed a flat this week, only to find the valve had perished. Put the spare on & thats the same. I had the tyres fitted to some different wheels 3 years ago & I presume they changed the valves. Maybe not or maybe they used cheapo valves.
     
  2. Valve stem or schraeder pin??
     
  3. I’ve never seen a perished valve as in the rubber bit. Quite possible that they weren’t changed at last tyre swap. It’s common for the metal part to corrode especially if metal dust caps are fitted.
     
    Bulletooth likes this.
  4. Yes, I've had a few, some where only two or three years old.
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    I now fit metal valves.

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    Gooders and art b like this.
  5. Even metal valves will have rubber seals.
     
    art b, Razzyh and davidoft like this.
  6. Not exposed to UV light though..
     
  7. Just had the car fail it’s mot in this issue
     
  8. Thats obvious, but it is on the inside of the rim not subject to UV, even if it fails there is no chance of the valve blowing out.
     
  9. Yes mine have perished in the same place. I am a bit reluctant to fit metal valves. I see a lot on vehicles at work that have TP monitors & the cap threads often corrode. The cap seizes on, have to remove them with mole grips & they often snap off.
     
  10. Blimey, that's a harsh fail point- how did they know they were perished, were you losing air?
     
  11. It failed on other thinks as well but I think it's part of the new mot rules
     
  12. Rubber valves have a metal thread as well. Same problem if you have metal caps and don't check your tyre pressures regularly. Nothing to stop you fitting plastic caps.
     
  13. Yep its the alloy valves with the TPM’s that corrode with metal caps. Alloy/steel reaction.
     
  14. Gooders likes this.
  15. Valve check has been part of the mot for many years.
     
    matty likes this.
  16. Would a dab of copperslip on the threads prevent alloy/steel corrosion?
     

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