| [GMCnet] Tire Valve Stems [message #84753] |
Sat, 15 May 2010 19:40  |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Byron,
Did the Equal you purchased come with filtered Schrader valve cores and if
yes was Big-O able to install them in your tire stems?
If yes could you please examine your tire stems and advise everything that
is marked on them.
The reason I ask is because I have tire stems marked as follows:
TR-543
Ventrex
Made in Austria (no Kangaroos!) ;-)
And the filtered Schrader valve cores won't fit.
John Sharpe and I are doing some research into this.
There are four different valve stems that will fit the Alcoa or Eagle
wheels:
O-ring seal
TR-543
TR-543C (bent at a 45° angle)
Grommet seal
TR-553
TR-553C (bent at a 45° angle)
John has obtained a TR-553C and the filtered core will fit, however, it is
brass and not nickel plated so we’re leery of installing it due to
dissimilar metal corrosion problems.
He’s called Jim K who is sending him one of the nickel plated valve stems he
sells for Alcoa wheels to see if the filtered valve stems will fit.
I realize that you can still air up unfiltered Schrader valves BUT if you
want to install a tire pressure monitoring system the fact that the Equal
can get into the stems could cause false readings.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Byron Songer
Sent: Sunday, 16 May 2010 1:41 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Need a suggestion for a jack to carry
Then I read the discussion about Equal. Bought some. Returned to Big-O and
said to put it in. No problem, we know what we're doing.
Byron
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Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Tire Valve Stems [message #84951 is a reply to message #84753] |
Mon, 17 May 2010 11:52  |
Rick Denney
Messages: 430
Registered: January 2004
Karma: 0
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Senior Member |
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| Robert Mueller wrote on Sat, 15 May 2010 20:40 |
John has obtained a TR-553C and the filtered core will fit, however, it is brass and not nickel plated so we�re leery of installing it due to dissimilar metal corrosion problems.
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I would think a dab of nickel (gray) antisieze (just a dab) would solve that problem. Tubas and other brass instruments are constructed with raw brass and nickel allows in close contact with no issue, even after a century, and even in the presence of acidic "condensation". I have not checked to see where nickel and brass fall on a galvanic potential table, but maybe there's no real issue here.
Rick "who has never had a problem with valve-core galvanic corrosion" Denney
'73 Glacier 230 "Jaws"
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| Re: [GMCnet] Tire Valve Stems [message #85028 is a reply to message #84951] |
Mon, 17 May 2010 21:32 |
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USAussie
Messages: 15912
Registered: July 2007
Location: Sydney, Australia
Karma: 6
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Senior Member |
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Rick,
We are concerned with the aluminum / brass interface where the valve stem
retaining nut comes in contact with the wheel.
Regards,
Rob Mueller
Sydney, Australia
AUS '75 Avion-The Blue Streak TZE365V100428
USA '75 Avion-Double Trouble TZE365V100426
-----Original Message-----
From: gmclist-bounces@temp.gmcnet.org
[mailto:gmclist-bounces@temp.gmcnet.org] On Behalf Of Rick Denney
Sent: Tuesday, 18 May 2010 2:53 AM
To: gmclist@temp.gmcnet.org
Subject: Re: [GMCnet] Tire Valve Stems
I would think a dab of nickel (gray) antisieze (just a dab) would solve that
problem. Tubas and other brass instruments are constructed with raw brass
and nickel allows in close contact with no issue, even after a century, and
even in the presence of acidic "condensation". I have not checked to see
where nickel and brass fall on a galvanic potential table, but maybe there's
no real issue here.
Rick "who has never had a problem with valve-core galvanic corrosion" Denney
--
'73 Glacier 230 "Jaws"
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GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
_______________________________________________
GMCnet mailing list
List Information and Subscription Options:
http://temp.gmcnet.org/cgi-bin/mailman/listinfo/gmclist
Regards,
Rob M. (USAussie)
The Pedantic Mechanic
Sydney, Australia
'75 Avion - AUS - The Blue Streak TZE365V100428
'75 Avion - USA - Double Trouble TZE365V100426
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| Re: [GMCnet] Tire Valve Stems [message #85034 is a reply to message #85028] |
Mon, 17 May 2010 22:07 |
Ken Burton
Messages: 10030
Registered: January 2004
Location: Hebron, Indiana
Karma: 10
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Senior Member |
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Put a nylon or rubber washer insulator in there. There is no pressure on it other than what you get by tightening the nut.
Ken Burton - N9KB
76 Palm Beach
Hebron, Indiana
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| Re: [GMCnet] Tire Valve Stems [message #85052 is a reply to message #85034] |
Tue, 18 May 2010 00:32 |
John Sharpe
Messages: 489
Registered: February 2006
Location: Texas
Karma: 1
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Senior Member |
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| Quote: |
I would think a dab of nickel (gray) antisieze (just a dab) would solve that problem. Tubas and other brass instruments are constructed with raw brass and nickel allows in close contact with no issue, even after a century, and even in the presence of acidic "condensation". I have not checked to see where nickel and brass fall on a galvanic potential table, but maybe there's no real issue here.
Rick "who has never had a problem with valve-core galvanic corrosion" Denney
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The concern is about galvanic action between the valve stem (brass)and the Alcoa rim (aluminum) not the valve core. About the worst thing you can put against aluminum is brass. I agree that if they don't touch there is not a problem. Those of us that live in an extremely humid climate have learned to be cautious of galvanic conditions. There's a reason airplanes are not stored in Houston. Alcoa says, nickel plated valve stems. So that only the nickel contacts the aluminum.
John Sharpe
Humble,TX
'78 Eleganza TBI
'89 Spectrum 2000 MPI V-10
'40 Ford Panel Delivery TPI
johnasharpe@gmail.com
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