This engine utilizes a pressurized water forced circulation cooling system which includes a thermostat equipped mounted on the outlet side. 7M-GE Throttle Body ISC Valve From Heater To Heater To Radiator Thermostat By Pass Pipe To Block and Head Water Pump From Radiator 7M-GTE To Heater From Heater ISC Valve To Radiator Thermostat Turbocharger From Radiator Water Pump C00061 C00811