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DonH2000



Member Since: 12 Jan 2015
Location: North Kent
Posts: 551

United Kingdom 2009 Defender 90 Puma 2.4 XS CSW Santorini Black
Beware of aluminium tyre valve covers!
No 1 daughter bought me for Christmas some nice looking Land Rover tyre valve covers. Tried to undo them to check the tyre pressures over the weekend and two of them had welded themselves onto the valves (the valves turned as I tried to use a 10mm spanner on them). Cost me £10 per wheel to get the valves changed!

Be warned and regularly lubricate them. I am back with plastic ones now!!



Click image to enlarge
 Cheers Don.
Post #706186 9th May 2018 10:31am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
I’ve never had an issue, I use a tiny bit of copper slip on the threads. Sounds to me like they were over tightened. Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #706188 9th May 2018 10:33am
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DonH2000



Member Since: 12 Jan 2015
Location: North Kent
Posts: 551

United Kingdom 2009 Defender 90 Puma 2.4 XS CSW Santorini Black
Mine had a fine white alumininium powder on them and when I used the dremmel to cut the ends off to get access to the valve I still could not undo them as they had corroded on to the thread. Cheers Don.
Post #706190 9th May 2018 10:38am
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X4SKP



Member Since: 29 Nov 2013
Location: Berkshire
Posts: 2284

United Kingdom 2010 Defender 90 Puma 2.4 SW Stornoway Grey
Yes known problem (often the hard way... Shocked ) dissimilar metals initially in dry close contact + water = corrosion

Copper Slip will prevent this...

Click image to enlarge
 SKIP
https://www.defender2.net/forum/topic83242.html
Post #706197 9th May 2018 11:26am
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
My last car had metal valve caps from new and they were always getting seized. I was reluctant to put any sort of grease on there as I didn’t want to any to get in the valve stem and cause a leak. Bog standard plastic is the way to go.

Incidentally, did you know that the valve cap is the primary means of sealing the air in? The valve is really only there to stop the air rushing out before you put the cap back on. I definitely read that somewhere, but don’t ask me to give a reference! It always bugs me when I see cars with valve caps missing since I read that. 2007 110 TDCi Station Wagon XS
Post #706199 9th May 2018 11:41am
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
^^^^ Very true. I have these ones now and they do have sealing washers in.
And it is indeed dusinikarmstaks issue. Vale stems seem like brass?

When it comes to a little grease your only talking 1/4 the size of a pea amount iff that. Also tyre pressures I check regularity so they won’t be much chance to corrode.

I think the larger ones are worst because they are easily over tightened more.

Each to their own but I’d rather have them over plastic, and definitely not go without! Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #706206 9th May 2018 1:00pm
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discomog



Member Since: 09 May 2015
Location: Notts/Lincs Border
Posts: 2494

United Kingdom 2015 Defender 90 Puma 2.2 XS CSW Santorini Black
I'm afraid I must disagree, the valve cap is not the primary seal but is only a seal against ingress of dirt and dust. The primary seal is between the conical surface of the valve stem and seat. Some valve caps do have a synthetic rubber seal which helps prevent leakage which has already past the valve core but the prime reason for the rubber insert in the cap is to help prevent the dust cap coming loose. Defender 90XS SW
Mini Countryman Cooper S
Morgan Plus 8
Post #706208 9th May 2018 1:07pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Dissimilar metals issue* Apologies for the typo. On my phone. 🙄 Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #706209 9th May 2018 1:09pm
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Doc P



Member Since: 03 Apr 2016
Location: Midlands
Posts: 565

United Kingdom 2013 Defender 110 Puma 2.2 XS CSW Firenze Red
dusinikarmstaks😂

The most random auto complete I’ve seen since I wished my mate a ‘Happy Birmingham’.
Post #706257 9th May 2018 7:26pm
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VeeTee



Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512

Netherlands 
^^^ Not so random as you would think... every mistaken character sits next to the one on the keyboard that was ment to be pressed... so merely a case of thick fingers (or too small keys on the keyboard)... Laughing Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite
Post #706265 9th May 2018 7:49pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
Small iPhone. Laughing

Next time go larger I think! Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #706276 9th May 2018 8:05pm
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ericvv



Member Since: 02 Jun 2011
Location: Near the Jet d'Eau
Posts: 5816

Switzerland 2009 Defender 110 Puma 2.4 SVX Station Wagon Santorini Black
If you want to stand out of the crowds, get your tires filled with nitrogen, then you can put the telltale green plastic dust caps. Pretty special and won’t weld onto the valves. Did that with previous cars, but with the volume of nitrogen needed to fill Defender tires I don’t think I want to know what my tire shop would charge for that. Laughing
Eric You never actually own a Defender. You merely look after it for the next generation.
http://youtu.be/yVRlSsJwD0o
https://youtu.be/vmPr3oTHndg
https://www.youtube.com/watch?v=_GtzTT9Pdl0
https://www.youtube.com/watch?v=ABqKPz28e6A
https://www.youtube.com/watch?v=rLZ49Jce_n0
https://www.youtube.com/watch?v=XvAsz_ilQYU
https://www.youtube.com/watch?v=K8tMHiX9lSw
https://m.youtube.com/watch?v=dxwjPuHIV7I
https://vimeo.com/201482507
https://www.youtube.com/watch?v=ZSixqL0iyHw
Post #706283 9th May 2018 8:13pm
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Bluest



Member Since: 23 Apr 2016
Location: Lancashire
Posts: 3993

United Kingdom 2007 Defender 110 Puma 2.4 XS CSW Java Black
I've had great success inflating with a blend of 78% Nitrogen and 21% Oxygen with a few other choice ingredients making up the remaining 1% Laughing 2007 110 TDCi Station Wagon XS
Post #706286 9th May 2018 8:21pm
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VeeTee



Member Since: 06 Mar 2011
Location: Somewhere
Posts: 1512

Netherlands 
Only +20%, as ordinary air constists of 80% nitrogen... Wink Cheers, Vincent
1959 Polynorm 1/4 Ton Trailer, Olive Drab Green (sold)
1970 M416 Military Trailer (Camping Trailer Conversion), Epsom Green (sold)
1975 Series III 88 V6, Light Green (sadly sold)
1996 Defender 110 CSW 300 Tdi, Epsom Green (sold)
2000 Freelander 1 TD4 3-drs, Silver (sold)
2006 Freelander 1 TD4 5-drs Facelift Automatic, Tonga Green (sold)

MySite
Post #706287 9th May 2018 8:22pm
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custom90



Member Since: 21 Jan 2010
Location: South West, England.
Posts: 19452

United Kingdom 
ericvv wrote:
But with the volume of nitrogen needed to fill Defender tires I don’t think I want to know what my tire shop would charge for that. Laughing
Eric

You're telling me Eric, a few weeks ago I installed Dynabeads which needed tyre's completely deflating then re-inflating.
Admittedly I've only got a cheapy compressor, but took ages and there is a huge amount of air in them. Even more so with the 255's I have and wider.
It's no wonder they have such warnings on them (the tyre walls) about never over pressure setting beads etc.
I am pretty sure they would do you serious harm should one explode and being in the vicinity.
And that is probably putting it lightly too! Shocked Diesels Lives Matter. ⛽️🛢️👨‍🔧🧰⚙️
And if You Love the Country, then we’re on the same side ~
I got’ love for Britain, I got’ British pride’. 🇬🇧
Post #706290 9th May 2018 8:30pm
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