Huzaifa

iTrader: (1)

After a drive, I’ll switch the car off after parking up but sometimes if I turn the key pre-ignition, the fans will run for cooling I guess. I just leave them running until they stop (2 or so minutes) then pull the key out. Does it make any difference letting them run or not…

lockheed

iTrader: (1)

If the engines not running neither is your water pump, your cooled radiator water will be sat there not circulating.

1509joe

iTrader: (2)

It actually is that's the idea of the Subaru header tank. Convection takes over and the hot water rises from the turbo and is replaced by cooler water from the block.