The cooling circuit with separate head/block cooling
 Thermostat |  Cooling pump |
An electrically driven coolant pump supplies indirect charge-air cooling fully flexibly and on-demand in the low-temperature circuit and during turbocharger run-on after the engine has been switched off.
Engine cooling through the high-temperature circuit is via the thermostat casing with an integrated water pump driven via the exhaust camshaft by a zero-maintenance toothed belt.
