Re: grey valve
...same reason you'd want to adjust the front heater core: sometimes you
want a little heat, sometimes you want more.  I've smelled burning rubber
off my kids boots if the rear heater core is fully open, so I usually keep
it ~1/2 way open.
I notice the grey lever appears to have the fittings for a "bowden" cable,
i.e. perhaps VW was planning that this valve could be adjusted from
elsewhere (dashboard?).
I note that on my brother's '92 EV the rear heater is built into the floor,
and the core valve is electrically adjusted with a rheostat on the
dashboard, adjacent to the fan speed control.

Keith V.
Slocan Park, BC
'86 Vanagon GL Syncro (135 kmi)
'95 Golf GL T-D (daily driver)

> -----Original Message-----
> From: Todd Last [SMTP:rubatoguy@worldnet.att.net]
> Sent: Monday, November 02, 1998 8:43 PM
> To:   vanagon@VANAGON.COM
> Subject:      Re: Rear Heater Valve
>
> Yes, and why would you want to turn it on and off?  On in the winter, off
> in
> the summer? Or is it just to aid in the installation of the core?
>
> Westys4evr@aol.com wrote:
>
> > The gray lever turns the coolant flow on and off thru the heater core.