Contents: Engine M 123 ↡ Engine M 110 ↡
Engine M 123
Removing the manifold gasket (engine M 123)
1. Drain the cooling system.
2. Remove the air cleaner.
3. Disconnect the throttle controls.
4. Mark (mark it) location of all wires and hoses.
(Original can be found on the website MercedesMAN.ru)
5. Disconnect the coolant hoses and vacuum hoses; disconnect the wires from the carburetor.
6. Loosen the bolts securing the heater return pipe.
7. Unscrew the exhaust pipe flange nuts and tap to release the flanges.
8. Mark the position of the brackets on the manifolds.
9. Disconnect the heater control mechanisms on the exhaust manifold.
10. Loosen the nuts and remove the intake and exhaust manifolds from the cylinder head. Remove the gaskets.
11. Remove the carburetor.
12. Remove the exhaust manifold casing bolts.
13. Installation is performed in the reverse order of removal. Install new gaskets and make final adjustments to idle speed.
Engine M 110
Intake manifold
1. Remove the carburetor or throttle body housing.
2. Drain the fluid from the cooling system.
3. Disconnect the throttle control rods.
4. Mark the position of all wires and hoses and disconnect them.
5. Remove the mounting nuts and bolts and lift the intake manifold off the cylinder head. Remove the gasket. On some models, it may be necessary to remove the engine mount and vibration damper and support the engine before removing the manifold.
6. Installation is performed in the reverse order of removal. Fill the cooling system and finally adjust the engine idle speed.
Exhaust manifold
Exhaust system parts of the M 110 engine
1. Unscrew the exhaust pipe flange nuts and separate the latter from the exhaust manifolds. Remove the gaskets.
2. Mark the position of the brackets, unscrew the nuts and remove the manifolds from the cylinder head. Remove the gaskets.
3. Installation is performed in the reverse order of removal. Be sure to install new gaskets so that the convex edge faces the manifold.