Tyre Dust Covers
I also seem to remember that plastic TPMS valve caps (grey) have a couple of seals over standard (black) to better protect against water ingress and help prevent pressure leakage. There are indeed warnings on several tyre fitting websites against fitting ‘metal’ valve caps to TPMS systems.
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This ^^^^^Nuclear Nick wrote: ↑Tue Aug 17, 2021 1:53 pmThe manual states that only plastic caps should be used. The reason is that two dissimilar metals with water present will set up a corrosion cell. The process will chemically bond the two metals together, so it’s not ‘welding’ in the true sense.
On my old car the previous owner put metal caps on the tpms valves, no chance of removing them without snapping the valves. They just corroded together.
Ex -
Macan Turbo (Mamba Green)
Audi RS6 (Misano Red)
Audi S4 (Silver)
Audi S3 (Imola Yellow)
Peugeot 309 goodwood (Green)
Peugeot 306 gti-6 (Silver)
Peugeot 205 gti (Ltd edition Sorento Green)
Macan Turbo (Mamba Green)
Audi RS6 (Misano Red)
Audi S4 (Silver)
Audi S3 (Imola Yellow)
Peugeot 309 goodwood (Green)
Peugeot 306 gti-6 (Silver)
Peugeot 205 gti (Ltd edition Sorento Green)
But porsche will actually sell you aluminium caps for £43Nuclear Nick wrote: ↑Tue Aug 17, 2021 1:53 pmThe manual states that only plastic caps should be used. The reason is that two dissimilar metals with water present will set up a corrosion cell. The process will chemically bond the two metals together, so it’s not ‘welding’ in the true sense.
2021 Macan GTS Jet Black with Full Espresso Leather
2018 Macan in Agate grey (now sold)
Audi B5 RS4 - tweaked a little bit
Lotus Elise S1 Sport 160
2018 Macan in Agate grey (now sold)
Audi B5 RS4 - tweaked a little bit
Lotus Elise S1 Sport 160
- Nuclear Nick
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If you mean these - https://content3.eu.porsche.com/prod/pa ... 07004B1426 - they are sleeves, not metal caps. Beware of non Porsche parts for sale elsewhere.AndyC160 wrote: ↑Tue Aug 17, 2021 10:51 pmBut porsche will actually sell you aluminium caps for £43Nuclear Nick wrote: ↑Tue Aug 17, 2021 1:53 pmThe manual states that only plastic caps should be used. The reason is that two dissimilar metals with water present will set up a corrosion cell. The process will chemically bond the two metals together, so it’s not ‘welding’ in the true sense.
Nick
Defender 90 V8
991.2 C2 GTS
Macan Turbo - sold
BMW K1300S, BMW R1250 GSA
Defender 90 V8
991.2 C2 GTS
Macan Turbo - sold
BMW K1300S, BMW R1250 GSA
Ah...my mistake. Do they slide over the plastic caps then?Nuclear Nick wrote: ↑Wed Aug 18, 2021 7:05 amIf you mean these - https://content3.eu.porsche.com/prod/pa ... 07004B1426 - they are sleeves, not metal caps. Beware of non Porsche parts for sale elsewhere.AndyC160 wrote: ↑Tue Aug 17, 2021 10:51 pmBut porsche will actually sell you aluminium caps for £43Nuclear Nick wrote: ↑Tue Aug 17, 2021 1:53 pm
The manual states that only plastic caps should be used. The reason is that two dissimilar metals with water present will set up a corrosion cell. The process will chemically bond the two metals together, so it’s not ‘welding’ in the true sense.
2021 Macan GTS Jet Black with Full Espresso Leather
2018 Macan in Agate grey (now sold)
Audi B5 RS4 - tweaked a little bit
Lotus Elise S1 Sport 160
2018 Macan in Agate grey (now sold)
Audi B5 RS4 - tweaked a little bit
Lotus Elise S1 Sport 160
- Nuclear Nick
- Posts: 3814
- Joined: Wed Feb 17, 2016 3:42 pm
- Location: Bristol
I don’t have personal experience of these but from the description that is what they appear to do. And it would be consistent with Porsche’s recommendation to only use plastic caps.AndyC160 wrote: ↑Wed Aug 18, 2021 6:50 pmAh...my mistake. Do they slide over the plastic caps then?Nuclear Nick wrote: ↑Wed Aug 18, 2021 7:05 amIf you mean these - https://content3.eu.porsche.com/prod/pa ... 07004B1426 - they are sleeves, not metal caps. Beware of non Porsche parts for sale elsewhere.
It’s very possible that there are non Porsche caps available that are metal but, again, are to be avoided I would say.
Nick
Defender 90 V8
991.2 C2 GTS
Macan Turbo - sold
BMW K1300S, BMW R1250 GSA
Defender 90 V8
991.2 C2 GTS
Macan Turbo - sold
BMW K1300S, BMW R1250 GSA
For the record, the Porsche OEM caps I bought from Amazon, link posted above but "currently unavailable", are plastic and at £22.57 might almost seem too good to be true. Can't find it now but when ordering something gave me the impression that they were from America.
http://www.porsche-code.com/PP37WLA6, a Dolomite Silver S, collected from Stockport OPC on Valentine's Day 2023, after a 399 day wait.
Ex.: Gen2 S, Volcano grey 1/9/19 - 3/2/23 & 39,235 Smiles, RIP
Ex.: Gen2 S, Volcano grey 1/9/19 - 3/2/23 & 39,235 Smiles, RIP
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