Hydrodynamic heater pump

A hydrodynamic heater pump system comprising:

• a hydrodynamic heater pump comprising:
• a heater pump inlet passage;
• a pump outlet passage;
• a housing;
• a stator fixed relative to the housing;
• a rotor coaxially aligned with and positioned adjacent the stator, the rotor and the stator define an interior region of a hydrodynamic chamber operable for heating a fluid present within the interior region;
• and
• a drive shaft attached to the rotor for concurrent rotation therewith, the rotor moveable axially along an axis of rotation of the drive shaft between a pumping mode position and a heating mode position, the rotor located a first distance from the stator when arranged in the heating mode position and a second distance from the stator when arranged in the pumping mode position, the second distance being greater than the first distance;
• an engine including an engine cooling inlet passage fluidly connected to the pump outlet passage and an engine cooling outlet passage;
• and
• a first heat exchanger including a first heat exchanger inlet passage fluidly connected to the engine cooling outlet passage and a first heat exchanger outlet passage fluidly connected to the heater pump inlet passage.