Tyre pressure monitor leak

[Doofus]

Hi

I have a 2011 GSA with a deflating rear tyre. Unable to fine any nails, I dunked it in water and saw a nice stream of bubbles from the TPM valve - mostly from midway-up the stem around the hex nut, but some at the base too.

Does anyone know if there is much I can do with this from the outside - I suspect not...

Cheers
Darren

 

[Pukmeister]

BMW sell a repair kit which I believe is a nut and sealing ring beneath it.

I suspect you would need to remove your tyre from the rim and get the seal between TPS and rim replaced.

Maybe worth a phone call to Bahnstormer, or look at the online parts websites such as MaxBMW ?

The TPS are known to be fragile, perhaps you have cracked it somehow whilst adding air? I bought a right angled air line adaptor for mine to prevent doing so (Motrax IIRC), bought from Bahnstormer for about a tenner but you can find them online cheaper.

 

[Doofus]

Cheers Adam

Good to hear there's a repair kit. I'll call my dealer to see the scoop. I just saw you had an issue with your tyres. Glad that worked out ok for you. Thumbs up to the TPM (except when they leak air).

Darren

 

[Pukmeister]

From the MaxBMW site......

02 36 31 8 520 871 SET: REPAIR KIT, TIRE PRESSURE MONITOR VALVE - RDC0.02 1 $13.80

I presume that's about a tenner.

 

[Doofus]

Thanks again Adam.

The parts diag showed me how it fixed to the rim (I couldn't even tell on the wheel that the nut was part of the collar that held it on) so it was a great help. I let the air out the tyre, took off the nut and cleaned around the collar seat and the bit of the interior seal poking through, cleaned the threads, tightened nut back on, inflated tyre, and all good.

I think I will come to regret deciding to put a load of loctite on the thread for the clamp nut - I'm not sure what I was thinking!

Darren