[Vwdiesel] Coolant flow through stock oil cooler/heat exchanger

[Libbybapa at wmconnect.com]

Attached is the coolant flow diagram vor the diesel vanagon.  My area of 
concern is the oil cooler.  On the vanagon it routes between the two radiator 
lines.  It would seem to me there would be no flow through the cooler until the 
oil gets hot enough for thermosiphon.  To me that seems really goofy.  Also, 
note that the head/heater core path is blocked unless the heater valve is open at 
the core.  Also goofy IMO.  I will add a bypass in the line for hotter 
weather that can be closed for cold weather heater operation.  I think another 
improvement would be a tee in the oil cooler to cold radiator hose that would run 
to a tee in the bypass hose.  That would allow hot coolant from the head to run 
through the oil cooler (heat exchanger) in order to warm up the oil faster, 
then when thermostat opens that would stop the flow from cooler to bypass and 
would only allow flow hot from head through oil cooler to cold radiator hose, 
if oil is cooler, or if the oil gets hotter than the coolant, thermosiphon 
would reverse the flow and run the hotter coolant up to the hot hose to the 
radiator.  Is my logic intact?
Andrew