So can someone tell me how the coolant flows from the engine to the heater core and back in an 84 300D? I'm helping a friend with some repairs and we were discussing it a bit. It looks like the flow would be like this....

1. Out of the water pump, then out through the hose by the alternator.

2. Through that hose to the aux heater assembly, then through another hose up to the monovalve on the firewall and into the heater core.

3. Then through the heater core, and out the hose to the top of the head on the engine.

4. Through the engine back to the water pump where the circuit starts all over again.

Am I correct, or is the flow reversed from how I discussed (out flow at the top of the head instead of inflow)

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2012 Mercedes ML350 Bluetec 102K (hers)
2005 Corvette 55K (fun car)
2002 VW Jetta TDI 238K (mine)
1998 Volvo S70 T5 Turbo 211K (kids)
1994 Ford F150 4WD 246K (firewood hauler)
1983 Mercedes 300D 384K (diesel commuter)