Removing
Set the hood to the 90°position. why first unhook the left and then the right stop (1) bracket (2) from the first position, and then place the stopper in the second position.
Put rags on the wings to protect the paintwork.
Remove ground wire from battery.
Drain the coolant by removing the drain plugs on the bottom left of the radiator, on the left and right on the cylinder block, or on the right on 280SE models. Side bolts of the crankshaft bearing cap on V-engines (see arrow A in the figure) not to be confused with coolant drain plugs.
Remove the upper and lower radiator hoses.
Drain engine oil.
Unscrew the gearbox oil hoses from the gearbox oil cooler, and also unscrew the oil cooler hose clamps and drain the oil.
Pull both clips upwards from the fan shroud, take the fan shroud out of the lower bar and place it on the fan.
Pull both radiator mounting clips up and lift the radiator out. For 280SE engines, you must first unscrew the oil cooler and remove it upwards from the guides on the radiator.
On vehicles with air conditioning (6 cylinders) unscrew the compressor together with the support and set aside. Coolant pipes (refrigerant) no need to take off. On vehicles with V-engines, the air conditioner must be emptied and then the hoses on the steam pipe must be removed.
On vehicles with level control, unscrew oil pressure pump and set aside. To do this, unscrew only the bolts shown by the arrows in the figure. Remove hoses and shut off.
Suck out the oil from the power steering reservoir and remove the pressurized oil hoses from the power steering pump.
On 8-cylinder engines, remove the entire exhaust system. On 6-cylinder engines, disconnect the exhaust pipe from the exhaust manifold and from the gearbox.
Disconnect all coolant hoses and vacuum hoses going to the engine. Disconnect the wire from the top dead center sensor (TDC) on the diagnostic socket, for which the diagnostic socket must be unscrewed from the mount (two screws).
Disconnect the throttle control lever system.
Disconnect fuel lines.
Disconnect all electrical wires from the gearbox. Remove the inductive sensor for the tachometer from the gearbox. To do this, unscrew the M6 bolt and remove the sensor.
Remove the gearshift lever.
Remove the clutch hydraulic hose from the clutch housing.
Remove engine shock absorbers left and right.
Unscrew the flanges of the cardan shaft and the gearbox, move the cardan shaft back together with the washers, first removing the clamping nuts from the connection.
Pass a suitable cable through the engine lugs (arrows), hook the cable to a crane or hoist and tighten it slightly.
Remove the front engine mounts on the left and right by unscrewing the mounting bolts from below.
Remove the rear engine mount or metal pan with the mount by unscrewing the nuts (1) and mounting bolts (arrows).
Carefully lift the engine, and tilt it at an angle of about 45', and then remove it from the engine compartment. Carry out this work very slowly and constantly monitor so that the engine does not remain hanging, on wires, etc. Take care not to damage the wall of the engine compartment, as it could damage the windshield washer. It is recommended to use special lugs on the engine to lift the engine.
Installation
Engine installation is made in an order, the return to removal, at observance of following conditions.
Do not install engine parts until the engine mounts and support holder are installed and the engine is hanging from the cables.
Mount the rear engine support in a loose state.
Roll the car and tighten the clamping nut on the driveshaft connection.
Attach the control arm system and check its operation.
Install and adjust radiator mount.
Fill with oil, coolant, coolant and check the systems for tightness.
Check coolant condition (density, freezing point).
Install ignition, adjust idle and throttle.
Check engine for tightness and leaks.
Rubber mounts should be replaced with new ones if they are cracked, worn or deformed.
Remove oil and grease from rubber parts. Tighten all bolts and nuts to specified torque.
Removal of the engine and gearbox is not necessary when it is only necessary to replace the rubber engine mounts.