Quote:
Originally Posted by COSMO
I would have thought the coolant coming from the heater core since it is the highest point would flow down and through the turbo out to the engine port on the side.. That's strange that it would flow up instead of down...
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the turbo acts as a thermosiphon, the coolant flows up because heat rises, this video demonstrates the effect
The main benefit of watercooled turbos is this thermosiphon effect which prevents heatsoak after shutting off the car from damaging the bearing system, properly oriented turbos/water lines will continue to pull water through the turbos without a pump.