Yup. 5/8" heater hose. Stiff enough walls that it won't collapse under vaccuum, and it is proof against hot oil and other type hydrocarbon vapors it will come in caontact with. I even went so far, on my 1.9 (which is slightly different), to replace most of the hose with a piece of steel tube, and only used the rubber hose on the ends, at the breather tower, and the intake manifold adapter. Has done well over the past 5 years of daily driving...

"by way of David Beierl <dbeierl@attglobal.net>" <Ccsvanagon@WMCONNECT.COM> wrote:  In a message dated 7/22/2008 11:02:28 PM Central Daylight Time,
dbeierl@attglobal.net writes:

>Crankcase ventilation (black tower rising from engine, fattish black
>hose going forward, may have a small heater inserted in the hose)?

That's it. I want to put a new hose on it. Right now I am using a
piece of red heater hose.

By the way, I forgot to mention this is an '87 Wolfburg edition Van.

Any one know the part number for the hose?

Thanx,

Chris

Snyder