Nissan 14411-1KC2B Turbocharger

On turbocharger to exhaust manifold nuts, new ones have to be used on refitting while new oil supply pipe O-rings and copper washers also have to be used. The initial steps in the procedure include disconnecting the battery negative terminal, removal of the air cleaner assembly and the air ducts, draining the cooling system, and the removal of the exhaust system front pipe/particulate filter in the case of the initial Type 1 engines with the diesel particulate filter. Subsequently, the EGR volume control valve housing as well as the EGR cooler are unbolted and disconnected and the exhaust fuel injector quick-release connector as well as wiring harness connector pulled away. The oil supply pipe is then removed from the turbocharger end and cylinder head end and the oil return pipe is disconnected from the turbocharger. The outlet duct of the turbocharger is then dismantled and lastly; the "charger is detached from the exhaust manifold. The procedure for later Type 1 engines as well as all Type 2 engines differs from the one described above only at the beginning: there is also a battery disconnection, diesel particulate filter removal, the vacuum hose from the turbocharger actuator and exhaust gas temperature sensor wiring harness demolding. The support bracket is then unbolted as well as taken off, the wiring harness is also relieved off this bracket, and there is also the air inlet pipe that is disconnected from the turbocharger. The oil return pipe is split, while the oil supply pipe is removed. The turbocharger is then un fastened with the exhaust manifold, and then the support bracket is disconnected before lifting up the turbocharger from the manifold in addition to the removal of the exhaust manifold heat shield/gasket. Refitting consists in carrying out all the operations inverses to the removal ones; check that any hose clamps damaged have been replaced; tighten the turbocharger-to exhaust manifold nuts to the specifications; fit new oil supply pipe O-rings and copper seals; cover with sealant the union threads; and fit a new gasket and oil return pipe O-ring seal.

Boost pressure in the inlet manifold is regulated by a wastegate that diverts exhaust gas away from the turbine wheel based on a pressure-sensitive actuator, while a boost pressure sensor monitors the turbocharging pressure.

Regular oil and filter changes using high-quality oil are essential to prevent carbon formation on the turbo shaft and potential failure.