You should drain the cooling system, remove the battery tray, the cowl panel retaining bolts, and the cowl panel, use J 38185 to slide the clamp away from the base of the heater inlet hose, remove the inlet
Heater Hose from the heater core, use J 38185 slide the clamp away from the base of the heater inlet hose and remove the clamp and hose from the engine cooling thermostat assembly.