It's an elasticity issue.  Those folds "fold" every revolution, isn't that
something like 800,000 times every 1000 miles?  It takes a top quality
rubber to hold up to this constant flexing.

Stuart

From: kenwilfy@gmail.com [mailto:kenwilfy@gmail.com] On Behalf Of kenneth
wilford (Van-Again)
Sent: Friday, March 22, 2013 11:35 AM
To: Stuart MacMillan
Cc: Vanagon List
Subject: Re: Cv boots cracking

We used to be able to get the GKN/Lobro aftermarket boots for the rears and
when we did, you could look around the edge and see the VW/Audi logo that
was just under the edge of the metal base of the boot.  When I did this
occasionally I would get someone who had a similar problem as Craig.  They
would tell me that they installed the boots and they only lasted a couple of
years.  Then other folks would never really have an issue with them.  I am
not sure if there is an installation issue that could cause the boots to
prematurely fail?  I wouldn't think they would dry rot and crack unless the
rubber itself had just failed because of the quality of it, but I am not a
rubber expert.  Any one have an idea of why this would happen to some and
not happen to others?  Right now we have either Rein (which I haven't been
getting any complaint on) or Meyle.  Of the two I would rather use the Rein
brand as they seem to be a higher quality brand and are made in Italy.  The
Meyle brand is usually made in China or India.

Ken Wilford

John 3:16

www.vanagain.com

On Fri, Mar 22, 2013 at 12:56 PM, Stuart MacMillan <stuartmacm@gmail.com>
wrote:

The OEM dealer boots are EDPM rubber (at least they used to be) and worth
the money.  My '84's boots were still good when I sold it in 2006 after 200k
miles, and I replace the joints once (not the boots). Lucky for me, my "new"
'85 still has the original boots and they are fine after 145K.

I don't know what some of the aftermarket boots are made of, and there is
probably no way to tell for sure.

It's too bad no one sells a split boot anymore, at least with those you can
replace them easily.  You might call these guys to see if they have anything
though:
http://www.dormanproducts.com/c-255-cv-joint-boot-kits-solvent-welded-split-
boot.aspx

Or look for used OEM boots!

Stuart

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
Craig Cowan
Sent: Friday, March 22, 2013 8:30 AM
To: vanagon@GERRY.VANAGON.COM
Subject: Re: Cv boots cracking

Because it doesn't need to be serviced at this interval! I just rebuilt some
with a friend that were original to the bus and have never been serviced (
he's the original owner). 140,000 miles and 26 years of use, and the boots
we took off were fine!
So why do mine suck?

-craig