[Vwdiesel] head gasket needed?

[LBaird119 at aol.com]

  One simple test is to start the car up, remove the cap, have the 
reservoir is in the normal range and then watch the return stream 
flowing back into the reservoir.  If it's a steady stream of coolant 
(might need to pull it up to a fast idle) then your problem is with 
the cap or such.  If the stream spurts air or is mostly air instead 
of coolant then you have a leaking head gasket most likely.  
  It's pretty rare for coolant to end up in the oil on the VW diesels 
it seems.  Reasonably common for oil to get into the coolant but 
it only happens in one place really.
     Loren