[mwebb]

Originally Posted by Piwoslaw

One of the downsides of grille blocks and hotter thermostats is that your engine is hotter when it is turned off. I've seen many cautions that this can cause the block to crack or other elements in the engine bay to malfunction sooner. So I've been opening my grille blocks and turning the cabin heat up about 1-2 km from home, but this usually doesn't reduce the coolant temp by more than 2-3°C.
I thought that turning the radiator fan on at a low speed would be more effective.
What do you think?

open the hood when you park / stop the car
low tech , but effective

VW puts an after run coolant pump to circulate coolant after hot shut down in many systems beginning around 2001 in the ATQ engine for the reasons mentioned here