[Vwdiesel] cooling system

[James Hansen]

There is a restrictor in the small hose a few inches from the tank, the 
orfice in that can get plugged, or more restrictored.  THe one with big 
flow may have the restrictor removed, or drilled out larger.

To verify a good water pump, just check bearings for play, and leakage, 
but if it was an impeller missing/broken the engine would heat up pretty 
quick, not like you describe Terry.
-james

Terry Briggs wrote:
>       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
> 
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