There are a number of different types of hose clamp pliers for these. You
can even get ones with a cable to extend the reach of the clamp from the
handles.
http://www.google.com/products/catalog?rlz=1T4GZAZ_enUS364US365&q=hose+clamp
+pliers&um=1&ie=UTF-8&tbm=shop&cid=15452768117111512200&sa=X&ei=8kfTT8_1IvCA
6QH2vpSuAw&ved=0CKQBEPMCMAE

As for the clamps they are actually common Roto-Clip.
http://www.rotorclip.com/cat_pdfs/ctb.pdf

The sizes you need are available McMaster Carr.
http://www.mcmaster.com/#standard-hose-clamps/=hwh1s4

For what they cost I like to replace them. They do stretch out and loose
tension. On the outside they can also rust.

Dennis

-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
JRodgers
Sent: Friday, June 08, 2012 7:36 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Factory Hose Clamps

I'm sure there is a tool to remove and reinstall VW factory hose clamps but
what is it? And where could I get one? I want to remove the hose clamps on
the rear heater hoses and would like to reuse them - among others on my
vans. Hate to destroy those clamps. They seem to be really good. Anyone
dealt with this before?

Thanks.

John