Blocking off the hoses is much  better than joining them.
when you join them you short circuit the front heater a little.

the 'real' way is to go underneath and remove the 'T's' and replace them
with straight hose connectors.

the hoses are 5/8ths where they go on the heater core ..
but smaller than that right away ..
one of vw's hoses that's one size on one end, and another on the other end.

scott
www.turbovans.com

----- Original Message -----
From: "tim" <h2oboxer@OPTONLINE.NET>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Sunday, December 04, 2011 4:25 PM
Subject: Leaking Rear Heater

> Finally found out the source of my cold weather leak: rear heater core.
>
> I would like to remove the core and just connect the hoses together.
>
> What if the ID of the hoses that go to the rear heater?
>
> Thanks