Before you replace the Coolant Pipe outlet, you need to think of draining the cooling system. Remove radiator inlet hose from coolant outlet pipe using the hose clamp plier (J 38185). Next, unscrew the bolt holding the oil level indicator tube, coolant outlet pipe, and engine front lift bracket to Cylinder Head. Then, remove the coolant outlet pipe from the thermostat case, but dispose of the seal o-rings. Lubricate two new o-seal ring pieces with coolant out and prevent twisting them, and install them to the grooves of coolant outlet pipe. Place the coolant outlet pipe into the Thermostat Housing and tighten the bolt for the oil level indicator tube, coolant outlet pipe, engine front lift bracket, which attach them to the Cylinder Head with 20 nm (15 ft lbs.). Finally, attach the radiator inlet hose to the coolant outlet pipe with the help of hose clamp pliers (J 38185) and fill the cooling system.