Genuine Mercedes-Benz 190E Intake Manifold

Mercedes-Benz 190E Intake Manifold Parts and Q&A

• Manifold
  102-140-55-01
  Q: How to remove and refit of the intake manifold in the Bosch CIS-E fuel injection system on Mercedes-Benz 190E?

  A:

  The inlet manifold should be removed by deriving the battery negative lead first then deriving the fuel system by pushing the fuel system against the negative lead. And remove the throttle guide lever throttle cable, and the control pressure cable, and, in models with automatic transmission or cruise control, the throttle control linkage at the throttle actuator unit. After unclipping the harness remove the support rail wiring harness attached at the inlet manifold then remove the air cleaner assembly. Then take off the cold start, fuel distributor/airflow sensor, Throttle Body. In 6-cylinder engine models with cruise control, remove the throttle actuator unit with mounting bracket off its inlet manifold. On 4 cylinder engine models, dismount the hose connecting to idle speed air distributor and make sure to label the hose and unscrew the nut that joins the two hoses but still connects to the bracket where the brake servo vacuum hose is positioned. Unbolt the engine lifting bracket off the manifold, unscrew whatever remaining of the wiring plugs and vacuum hose and label them, and unbolt and remove the support strut(s) under the inlet manifold, being careful not to leave anything attached to it that could hinder removal. Turn off the retaining nuts and bolts and slide the inlet manifold upward off of the cylinder head, claiming and dumping the gasket. In the unlikely event of need, uncouple the upper and lower parts of the manifold (removing the securing bolts) but observe that the gasket between the two parts must be replaced on re-assembly. Do not score the surfaces that mate the cylinder head and manifold but clean up thoroughly and be careful to remove all indication of the previous gasket, examine distortion indicates in case of leakage signs. To refit, reversing the steps of removal, have both mating surfaces clean and install the new gasket in place on the cylinder head studs, as desired, arranging the throttle cable and control pressure cable accordingly, turning the engine on and off to check the sealing of the manifold and adjusting the engine idle speed as desired.
• Intake Manifold
  103-140-37-01
  Q: How to remove and refit the intake manifold on Mercedes-Benz 190E?

  A:

  To remove the inlet manifold from normally-aspirated diesel engines, start by disconnecting the battery negative lead and positioning it away from the terminal. For better access, remove the air cleaner and, if applicable, unbolt the fuel pipe brackets from the manifold. Disconnect the ventilation hoses from the ports on the top of the manifold pipes, then work along the manifold to slacken each of the securing bolts until they can be withdrawn by hand. Finally, lift the manifold away from the cylinder head and recover the gasket. For turbo-diesel engines, begin by disconnecting the battery negative lead and positioning it away from the terminal. Pull the vacuum hose from the port at the end of the plenum casting and unplug the wiring from the overload protection pressure switch at the connector. Unbolt the transverse section of the inlet ducting from the support bracket on the upper surface of the cylinder head, remove the bolts, and detach the ducting from the inlet manifold, recovering the gasket. Work along the manifold to slacken each of the securing bolts until they can be withdrawn by hand, then lift the manifold away from the cylinder head and recover the gasket. Refitting is a reversal of removal, ensuring to tighten the inlet manifold securing bolts to the specified torque.