In order to replace the water outlet tube (LU3) (4.3L), one must remove the air cleaner outlet resonator duct and remove the radiator inlet hose. Next, extract the turbocharger coolant bypass valve and water outlet bolts in order to extract the water outlet itself, dispose of the old gasket. For installation, insert a new gasket to the water outlet, lubricate o-ring seal with clean engine coolant, then reinstall the water outlet. Make sure you tighten the water outlet bolts to 21 n.m (15 lb ft) and reassemble the radiator inlet hose and the air cleaner outlet resonator duct.