Replacing tyre valves on Classic wheels

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junglie69
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Joined: Sat Dec 20, 2008 8:44 pm

Replacing tyre valves on Classic wheels

Post by junglie69 » Sun Jan 21, 2018 8:55 pm

I had to replace 2 valves recently, been leaking for a while after refurbishment. Modified a 3/8” 13mm, 6 point socket on a grinder. When you look the valve the nut part is very shallow so the important bit was to grind the end flat to get rid of the chamfer on the inside of the socket to allow it to grip as much surface as possible so the socket sits all the way on. I have included a link with a note from Alpina on changing the valves hope this helps someone in future.

I followed the instructions to the letter, the last thing I wanted was to strip a thread.
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My Classic wheels they have had a couple of refurbs with the valves remaining on. Probably should have removed them.
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The valve on the left I tried to remove with a standard socket as you can see it didn't work. The other valve and the rounded one were removed easily with the modified socket.
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You can see where I ground the chamfer away at the bottom of the socket to give it as much grip as possible.
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The 2 removed valves, the o rings are completely flattened and just about destroyed probably due the refurbishment. Not surprising they were leaking really. I will keep them and use temporarily if the wheels get refurbed again.
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Arvi
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Post by Arvi » Mon Jan 22, 2018 11:47 am

Its a shame wheel refurbers don't give the advice that the valves should be removed, even if it costs a bit extra, or replaced at the time of refurb as they don't cost much in the grand scheme of things.

BarryM
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Post by BarryM » Tue Jan 23, 2018 12:27 am

They’re quite precise instructions, when I changed my valves a while back I was most concerned with finding a suitable socket. I didn’t use loctite on mine as assumed the o ring would do it’s job and I wonder why the thread is whitworth!
2001 Alpina B10 V8 #185
1982 Krauser MKM1000 #121 - sold

Bertroex
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Post by Bertroex » Thu Jan 25, 2018 6:50 pm

Thank you for posting this up. I just ordered new metal valves for my winter wheels, and I require my summers refurbishing so Sytner provided the valves.

Great Post!

Bert
1976 Porsche 911 Carrera 3.o
1985 Porsche 924 S

ex:1983 E28 525I, 1985 E28 528I, 1989 E30 325I Mtec coupe, 1986 M535I, 1990 E30 320i Touring, 1990 E30 325I touring, 1990 E34 525I, 1998 Z3 1.9, 1998 E39 523I SE, 1999 e46 328CI, 2008 E92 Alpina B3 BiTurbo 053
and 13 Porsches...

Jay_hagga
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Post by Jay_hagga » Fri Feb 02, 2018 9:20 pm

Is that 1/8 Whitworth a typo? Seems a little small. I need to change one on mine (got a spare off fleabay) and thread looks more like 1/8 bsp. Can you measure the tap or old valve.. if it's 9.5mm tis more likely bsp.

junglie69
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Joined: Sat Dec 20, 2008 8:44 pm

Post by junglie69 » Sat Feb 03, 2018 2:03 pm

Hi you may well be right just put a vernier on it and came out at 9.47mm.

Jay_hagga
Posts: 26
Joined: Sun Mar 05, 2017 2:15 am

Post by Jay_hagga » Sat Feb 10, 2018 2:24 am

The thread pitch matches bsp too.. sorting mine soon but looks like someones had a go before (rounded off) so may have to drill it out :? And then re tap it.. not going to thread lock it but use ptfe tape.

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