Hello Barry,
I am sorry, but I don’t think that leaving the expansion tank empty is the right way to do it. I suggest to fill the tank at least one third with coolant.
I checked the owners handbook for the 411 and it confirms my opinion:
Quote:
Fill the system to the top ofthe filler neck and replace the filler
cap.
Run the engine for a short period and then allow the engine to cool off. (Turn the heater ON before filling the radiator).
Half fill expansion chamber when filling radiator.
When the system is cool remove the filler cap and top up to the same level again. Recheck after a short run.
Regards
Thomas
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