Seems like it really shouldn't matter much which approach you use ~
as there is a ShutOffValve & Restricter in the OutFlowLine of the rear
heater I would simply connect the 2 hoses & close the valve either
fully or partially as desired & DrivrOn 'til I could get a NewCore,

                                                                                        ORR ~ DeanB
On 3 Jul , 2013, at 1:00 PM, Scott Ohana wrote:

> if you join the two hoses you create a short circuit ..reducing flow
> to
> front heater core.
> I have not seen that blocking the hoses at the heater core causes any
> problems..
> though changing the T's to straight connectors is really the right way
> to remove or bypass a rear heater.
>
> I happen to have a brand new rear heater core in stock, that I would
> sell.
> Scott, Oregon
>
>
> On 7/3/2013 9:22 AM, Stuart MacMillan wrote:
>> 1/2" copper plumbing will work.  And you are doing the right thing
>> connecting them together rather than plugging them, which creates air
>> pockets in the system.
>>
>> Stuart
>>
>> -----Original Message-----
>> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On
>> Behalf Of
>> Jamie Auch
>> Sent: Wednesday, July 03, 2013 8:55 AM
>> To: vanagon@GERRY.VANAGON.COM
>> Subject: Sprung a leak!
>>
>> I started to hear hissing under the back seat of my '89 auto 2.1
>> Westy. Anti
>> freeze was coming out of rear heater core. What is the size of the
>> hoses so
>> that I can splice them together? This is a repair while traveling.
>> Thanks.
>>
>> Jamie Auch
>>
>> Sent from my iPhone=
>>