Date: Sat, 19 Nov 2005 20:31:40 -0500
Reply-To: Milo's Kitchen <sagmoore@ZOOMINTERNET.NET>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Milo's Kitchen <sagmoore@ZOOMINTERNET.NET>
Subject: Re: Honey I shrunk the coolant pipes
In-Reply-To: <b31050488d4bff2106ae7be5e0231299@knology.net>
Content-Type: text/plain; charset="US-ASCII"
Hi Jim,
Have you checked to see if the metal insert in the plastic pipe end (forming
the bead) is moving out of the plastic pipe? The plastic pipe was
manufactured with the metal insert, and as it ages, it will migrate out. If
it has, when you clamp the hose over the now unsupported section of plastic,
the hose will gradually slip off the plastic pipe.
Two solutions exist: new plastic pipes from VW ($$$), or, the brass insert
kits from Go-Westy ($).
I can recommend the brass inserts. I have installed kits on the two Vanagons
I own, a '91 Carat and an "87 Syncro, with good results. You have to remove
the hoses from the pipe ends, then use a high wattage hair dryer or some
other "soft" heat source to re-seat the metal inserts back to their proper
position in the plastic pipes. Once that is done, you install a brass insert
into the hose and clamp it in place so it can't slip further into the hose,
(leaving enough hose to slip over the plastic OEM pipe to clamp). The brass
insert prevents the OEM metal insert from migrating from the plastic pipes,
and therefore, no more leaks. See
http://www.gowesty.com/Merchant2/merchant.mvc?Screen=PROD&Product_Code=251-1
21-399KIT&Category_Code=mp-h20 for the kits.
Hope this helps,
Dave Milo
-----Original Message-----
From: Vanagon Mailing List [mailto:vanagon@GERRY.VANAGON.COM] On Behalf Of
Jim Felder
Sent: Saturday, November 19, 2005 6:20 PM
To: vanagon@GERRY.VANAGON.COM
Subject: Honey I shrunk the coolant pipes
Has anyone had this happen?
For the second winter in a row, my 90 carat with plastic pipes developed a
drip where the rubber radiator hose connects to the long plastic pipe at a
connection visible just aft of the spare tire tray but above the tire.
And for the second year in a row, I can see exposed white plastic where the
pipe has been pulled out a bit, about a quarter inch or a bit more, from
where it normally fits into the rubber hose. Both times I have loosened the
connection, slid the hose back to its previous position on the pipe, and
tightened the clamp again with nary a drip till cold weather strikes.
Obviously, there is some amount--looks like a quarter inch--of contraction
in the pipe in cold weather. It seems though that rather than pulling out of
the rubber hose, the pipe would simply move the rubber hose, which I am sure
was meant to compensate for the temperature-caused movement of the long
plastic pipe.
Anyway, it's probably fixed at least until next year. I was wondering if it
was a common phenomenon.
Jim
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