had a shocker today

evan15281 · 11-17-2015, 12:34 PM

went to put my 400m winter wheels on. Usually just bolt on, no probs. All going fine. wheels fitted. Then discovered metal dust caps had corroded onto the TPMS alloys. Blew 2 valves trying to get em off. 40 quid later from BMW, new ones fitted by local indy as BMW couldn't accommodate me today.

However, just had a horrible thought that I don't think they balanced the wheels when swapping valve. Grrrrr.

Will find out tomorrow........

Ice Man · 11-17-2015, 12:37 PM

I wouldn't be happy with that I would be having words with the dealer and expecting new valves under warranty

k44ENT · 11-17-2015, 12:38 PM

I posted about this 'nearly' happening earlier this year. BMW have now moved onto silver plastic caps which won't corrode on. I caught the ones on my previous car early before the corroded through. If you still have metal caps try a bit of silicone grease on the threads.

je suis Paris · 11-17-2015, 12:54 PM

Your hands need moisturising....

Peter-K · 11-17-2015, 01:06 PM

Can you trace the valve caps back to a dealer? I first met the problem on a two year old Laguna with TPMS in 2003(?)!!! - caught at the stage where the caps could be removed but the stem thread had gone. There's a copy of a 2010 technical bulletin from Schrader at Approved OEM Requirement for Replacement of Sealing & Wearable Components on TPMS Sensors
"It is also important to use the plastic replacement cap to ensure that a dissimilar metal cap is not used to contact the aluminum stem"

planemad · 11-17-2015, 01:27 PM

Galvanic corrosion I think

evan15281 · 11-17-2015, 01:49 PM

Quote:

Originally Posted by je suis Paris

Your hands need moisturising....

They need skin grafts after today's shenanigans!

HiBee · 11-17-2015, 04:35 PM

Quote:

Originally Posted by k44ENT

I posted about this 'nearly' happening earlier this year. BMW have now moved onto silver plastic caps which won't corrode on. I caught the ones on my previous car early before the corroded through. If you still have metal caps try a bit of silicone grease on the threads.

Didn't realise they are now fitted with plastic caps.

I've always used a touch of copper grease on any steel caps of all my past motors to stop this happening. especially if you don't check tyre pressures regularly. Also tighten them up a fraction with a pair of pliers, to stop the buggers from nicking them.

creepy coupe · 11-18-2015, 03:02 AM

I had this with the wife's car. Fortunately it didn't have the latest TPMS so I just needed new valves. It has plastic caps now.

11-17-2015, 12:34 PM	#1
evan15281 Lieutenant 86 Rep 459 Posts Drives: 335d Join Date: Mar 2014 Location: Lanarkshire iTrader: (0)	went to put my 400m winter wheels on. Usually just bolt on, no probs. All going fine. wheels fitted. Then discovered metal dust caps had corroded onto the TPMS alloys. Blew 2 valves trying to get em off. 40 quid later from BMW, new ones fitted by local indy as BMW couldn't accommodate me today. However, just had a horrible thought that I don't think they balanced the wheels when swapping valve. Grrrrr. Will find out tomorrow........ Attached Images
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11-17-2015, 12:37 PM	#2
Ice Man Captain 325 Rep 737 Posts Drives: F36 435i M-Sport Join Date: May 2015 Location: BSE iTrader: (0)	I wouldn't be happy with that I would be having words with the dealer and expecting new valves under warranty
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11-17-2015, 12:38 PM	#3
k44ENT Lieutenant Colonel 492 Rep 1,503 Posts Drives: M2 LCI DCT Join Date: Jun 2009 Location: UK iTrader: (2)	I posted about this 'nearly' happening earlier this year. BMW have now moved onto silver plastic caps which won't corrode on. I caught the ones on my previous car early before the corroded through. If you still have metal caps try a bit of silicone grease on the threads.
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11-17-2015, 12:54 PM	#4
je suis Paris Banned 50 Rep 95 Posts Drives: M135i diesel Join Date: Nov 2015 Location: Paris iTrader: (0)	Your hands need moisturising....
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11-17-2015, 01:06 PM	#5
Peter-K Private 10 Rep 54 Posts Drives: 220d M Sport Join Date: Aug 2014 Location: North Yorkshire (UK) iTrader: (0)	Can you trace the valve caps back to a dealer? I first met the problem on a two year old Laguna with TPMS in 2003(?)!!! - caught at the stage where the caps could be removed but the stem thread had gone. There's a copy of a 2010 technical bulletin from Schrader at Approved OEM Requirement for Replacement of Sealing & Wearable Components on TPMS Sensors "It is also important to use the plastic replacement cap to ensure that a dissimilar metal cap is not used to contact the aluminum stem"
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11-17-2015, 01:27 PM	#6
planemad Lieutenant Colonel 773 Rep 1,643 Posts Drives: 2020 Audi SQ7 & 2019 AM DB11 Join Date: Mar 2013 Location: The Democratic Peoples Republic Of South East England iTrader: (0)	Galvanic corrosion I think
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11-18-2015, 03:02 AM	#9
creepy coupe Lieutenant General 1867 Rep 13,043 Posts Drives: BMW M340I G20 Join Date: Aug 2007 Location: UK iTrader: (2) Garage List 2015 BMW 435d [0.00] 2009 335i [0.00]	I had this with the wife's car. Fortunately it didn't have the latest TPMS so I just needed new valves. It has plastic caps now. __________________ -------------------------------------------------------------- Current car.M240i. Previous.MINI JCW. E92 325i. 435d M235i.M135i. 635d Coupe, E92 M3 manual, E92 M3 DCT Competition Pack. E92 335i, Porsche Cayman S Gen2, 135i Coupe. E92 320d, MK5 R32. MK5 Golf GTi,MK5 Golf GT-TDI,E46 318Ci.
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