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Introduction
Engine coolant · · · c) When the engine coolant temperature is 158 ℉ (70 ℃ ) or higher
Engine coolant flows into the radiator ( ⑥ ) via the thermostat ( ④ ) to dissipate heat, and
returns to the engine coolant pump ( ① ).
① : Engine coolant pump ⑧ : Engine ⑮ : Exhaust muffler
② : Exhaust air heat exchanger ⑨ : Gas mixer ⑯ : Exhaust water drain filter
③ : Thermostat (140 ℉ (60 ℃ ) ⑩ : Gas regulator ⑰ : Exhaust water drain hose
④ : Thermostat (158 ℉ (70 ℃ ) ⑪ : Electromagnetic gas valve ⑱ : Exhaust water drain trapper
⑤ : Sub heat exchanger ⑫ : Air filter ⑲ : Sub oil reservoir
⑥ : Radiator ⑬ : Engine coolant temperature sensor
⑦ : Engine coolant reserve tank ⑭ : Radiator cap
shows the coolant flow direction
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