Based on your description the hose you need is 25mm (1") at the end that
plugs onto the head and narrows down to 16mm (5/8") for the heater
junction tee. There is a common VW hose that does this, under $10

171 121 611E

It will be too short. The Vanagon hose normally goes bad at the head
end. You can cut off the bad end and splice in the above hose that is
about a foot long. Use a 5/8" hose splicer to attach it to the remaining
original hose. Or get some additional 5/8" heater hose and splice the 2
new sections to make a new hose the full length.

Mark

Dominic Provini Jr. wrote:
> Good Morning,
>
> I am having some trouble locating a coolant hose  # 251-265-056B.(85
> 1.9L)  All vendors are either sold out or N/A. I can't even locate a
> used one. It runs from Cylinder #1 to the rear heater T.   Has anyone
> come across this hose anywhere?
>
> Thanks
>
> Dom
>
> 85 Westy
>
>
>
>
>