Commencing with early Type 1 engines with a diesel particulate filter in the front pipe of the exhaust system,disconnect the battery negative; Remove turbocharger. Locate the wiring harness of the exhaust gas temperature sensor to its connector, which should then be disconnected and the harness to be removed together with the manifold or in a different method, you have to undo the union nut to withdrawing the sensor probe from the exhaust manifold. After that, you need to unfasten the exhaust gas pressure sensor using a nut on the manifold, then you can unlock two clamps and take the metal pipe of EGA connected between the manifold and EGA valve out, additionally, you will have to change them according to the recommendations. Gradually loosen the mounting nuts to take off the exhaust manifold on the cylinder head studs and collect the metal gasket. Scrub the exterior of the cylinder head and exhaust manifold, and put a new gasket on the studs of the cylinder head. The process is similar to before for later Type 1 engines and all Type 2 engines with a diesel particulate filter behind the cylinder head: However, they power down the vehicle's battery negative terminal and remove the turbocharger. The same process should be followed for the exhaust gas temperature sensor and pressure sensor, then nut is loosened, the heat shield of the exhaust manifold is removed. Unlock the clamps and pull off the EGR metal tube, and as mentioned above, replace the clamps also. Remove the mounting nuts to remove the exhaust manifold the gasket can be retrieved later. It entails unbolting of the manifold retaining nuts performing the steps in reverse but with a new gasket and seals tightening the manifold retaining nuts to the recommended torque.