This hose is a combination air bleed/t-stat bypass. It is needed to bleed
the cooling system after a major coolant replacement, (any hose, water pump.
heater core work etc). The top housing is fairly inexpensive and easy to
replace. Do it soon so next time you need to work on the cooling system it
will be one less thing to deal with.

Dennis

----- Original Message -----
From: Jeff Gilbert <jeff_gilbert@PEOPLESOFT.COM>
To: <vanagon@GERRY.VANAGON.COM>
Sent: Wednesday, August 25, 1999 3:27 AM
Subject: Thermostat Hose

> Hi list,
>
> While puttering around with the Temp Sensor II on my 87 Syncro, I noticed
> that a  hose was disconnected from  thermostat housing (top).  It looks
> like the hose is supposed to connect to the valve that is just below and
> left of the Breather Valve on the housing.  My valve has been broken off
> and a screw has been placed in the bottom end of the hose.
>
> Can someone tell me what the purpose of this hose is?  Could the broken,
> unsealed valve on the housing be causing me any performance related
> problems?
>
> Thanks in advance,
>
> Jeff
>
> 87 Syncro Westie