Hi Bill,
    I don't know if this will help with an 84 but I have btdt on an 86.  The
heater hoses on an 86 (2wd, a/c,  manual ) were  all 5/8 inch  except from
Ts up to the rear heater. These hoses are 1/2 inch from the T's up through
the van  floor then switch to 5/8 inch to accommodate the 5/8 fitting on the
rear heater.  I recently replaced  mine and changed the T's to 5/8 inch on
all three points. The old T's  were already  5/8 to the engine and to the
front heater.  My experience is written up for my 86 using an Old Volks Home
hose chart , thanks  Jim,  at      http://taos.midwest.net/vw

Darrell Boehler
Makanda Illinois
86 westy  238K

-----Original Message-----
From: Monk Bill <BM2AM@AOL.COM>
To: Vanagon@VANAGON.COM <Vanagon@VANAGON.COM>
Date: Tuesday, June 09, 1998 7:18 AM
Subject: heater hoses?

>Fellow VW's,
>        I have an 84 Westy and I need to replace the hoses from the engine
to both
>heater cores. Is the two long hoses going from the t's in the rear to the
>front a VW dealer item? I tried 5/8" to small and 3 /4" to big?Is it a
metric
>size in the middle?Also the t's to the rear core,any source for them
besides
>dealer?
>
>Thanks,
>Bill M
>Mystic,CT
>84 Westy
>