Quote:
Originally Posted by A418t81
Passive siphoning occurs in any water cooled turbo. There hasn't been a non-water cooled turbo on a factory turbo car in nearly two decades. The N54 goes one step further and actually runs the electric waterpump at a reduced amount for a few minutes after you turn on the engine. This is actively, rather than passively, circulating coolant through the turbo bearing structures.
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I knew my B5 S4 did this...didn't realize our cars do this too
I remember putting a lower temp Coolant sensor so the pump would run more at lower temps than stock.