Gary
Had the same problem my cousins mini cooper. Tire seemed like it had a
nail, but seems the PO used a 'slime' substance at some point to fix a flat
and the inside of the rim was corroded to the point where it had pin holes on
a few spots due to excessive aluminum corrosion. Did some JB Weld epoxy and
some high temp silver metal tape and fixed it up. These were on some Japanese
forged rims and they looked to be of OK quality. I think this was the first
year of the new mini's and the rims were added a year or so after the car was
new so seems it can happen quickly.
The nitrogen is good as it has the lack
of water that most gas station air compressors have. I have an
aluminum Nitrogen tank with the matching regulator which was made
pretty inexpensively from a resturant supply place on line, I use that for the
race cars as well as anything else the compressor hose won't reach. (I have a
dessicant drying on the compressor as well).
I have a few sets of Compomotive
wheels and have talked with them (I think Alan?) I have had to have him change
a rim offset and looks like 2 halfs glued on the seams with some common clear
silicon with a really thick bead over the connection of the rim halfs, so
might be that or the valve stem ... Or could just be a nail ;) I know what you
mean, I took my set for mounting and they were treated like steel truck rims.
I ended up getting a tire and mounting machine to solve that issue, only 244
more mounts and balances before I break even...
Sandy
----- Original Message
----
From: Pointers <gpointer@telusplanet.net>
To: tigers@autox.team.net
Sent:
Fri, May 21, 2010 4:19:38 PM
Subject: Re: [Tigers] Magnesium Wheels
Just got
back from the tire shop. The TPMS on my Jeep was showing low pressure
in two
tires, which should not happen running nitrogen. They found corrosion
at the
valve stem opening. Having benefitted from this thread, I said "ah-so",
whereas prior to this thread I didn't realize aluminum could corrode so
quickly. Scrubbed it with wire brush & put some sealant on the pressure
monitor rubber gasket. So anyone who wonders why they might lose a bit over
time, this could be it. Apparently running nitrogen minimizes this problem
(according to the shop) given lack of internal moisture.
One tire on my Tiger
goes flat over winter, but lasts the summer OK. Haven't
figured that one out
yet. (Basically because I haven't determined who to trust
my Compomotive
modular wheel to).
Gary.
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