Removal the cylinder head (BMW 3 Series E21)

Disconnect the muffler inlet pipes from the exhaust manifolds and remove their mounting bracket.

Remove the air filter and cylinder head cover.

Drain the coolant and disconnect the wires from the battery terminals.

On carburetor engines

Disconnect the cooling system hoses and electrical wires from the thermostat housing.

Disconnect the fuel supply and drain hoses and electrical wires from the carburetor.

Disconnect the throttle control rod and remove it from the intermediate support.

Disconnect the distributor vacuum hoses. Disconnect the electrical wire from the coolant temperature sensor.

Disconnect the pads from the carburetor electromagnetic shut-off valves.

Disconnect the vacuum hose (large diameter) complete with check valve (white color) and the coolant hose from the rear of the cylinder head.

After loosening the adjusting nuts of the throttle control rod, disconnect it from the throttle control sector.

Loosen the adjusting nuts of the throttle control rod and remove it through the hole in the intake manifold.

On engines with fuel injection system

Remove the air supply casing.

Disconnect the throttle control rod from the lever and remove it from the intermediate support.

Disconnect the fuel supply lines to the injectors from the mixture regulator.

Disconnect the fuel supply line from the mixture regulator and remove the fuel line bracket located near the air flow meter.

Disconnect the hoses under the throttle body and the vacuum hoses.

Disconnect the pads from the starting injector and from the additional air supply valve.



Disconnect the coolant hoses from the rear of the cylinder head and the vacuum hose from the intake manifold.

Disconnect the cooling system hoses from the junction box.

On all engines

Disconnect the wires from the spark plugs and remove the distributor cap.

Loosen the generator drive belt tensioner bolt.

Remove the generator drive pulley and V-belt.

Remove the TDC sensor.

Remove the spark plugs from the cylinder head.

Set the piston of the 1st cylinder to TDC of the compression stroke; in this case, the installation protrusion on the protective cover of the camshaft drive belt must be opposite the "OT" mark on the rim of the vibration damper, and the marks on the rotor and the housing of the ignition distributor sensor must coincide.

Remove the camshaft drive belt protective cover.

Loosen the tension roller mounting bolts. Loosen the toothed belt by moving the tension roller toward the engine and, without changing the roller position, tighten the upper mounting bolt.

Remove the timing belt from the camshaft pulley.

Move the compensation tube downwards and secure it with tool 11 1 290.



Loosen the head mounting bolts and remove it.