[Vwdiesel] cooling system

[Terry Briggs]

      Just a question, On my '86 na with a/c, the small line from the 
radiator to the recovery tank always has a good amount of coolant flow 
going through it. Being that it's in the upper radiator hose and under 
under a flow condition due to the main hose I can understand why it is.
       On my '85 jetta that I just got there isn't a whole lot of flow 
going through that small hose. The jetta doesn't have a/c and that 
little hose comes off the side of the radiator like a more traditional 
overflow tube on say a chevy.

     It puts out good heat when you slide the temp controller over and 
the temp doesn't rise very quickly as I would suspect a bad water pump 
would cause it too. Is there a way to test whether the water pump is 
bad without ripping it all apart ?
Terry