We remove the exhaust manifold when replacing gaskets, as well as when repairing the cylinder head

We are preparing the car for repair work. We install the car on the observation ditch or on the lift.

Disconnect the negative terminal from the battery

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

From the bottom of the car, unscrew and remove the protection of the power unit (article - Removing the protection of the Nissan Almera power unit)

Disconnect the receiving pipe from the collector.

To do this, we unscrew the two nuts of the intake pipe fastening with the key 14 (Figure 2).

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

We remove the springs from the studs (the nut can turn away together with the stud)

We remove the intake pipe flange from the exhaust manifold flange and remove the spherical ring from the exhaust manifold flange

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

The exhaust manifold from below supports a bracket attached to the cylinder block (Figure 5, shown with the wheel drive removed).

With the head on 16 or a cap wrench, unscrew the nut 1 and bolt 2, fixing the bracket to the cylinder block

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

Removing the collector mounting bracket

We remove the air filter housing. With the head on 10, we turn off five bolts, fastening the upper heat shield.

Before unscrewing, wet the thread with a penetrating liquid WD-40, or brake fluid.

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

We remove the oxygen concentration control sensor (if replacement of the exhaust manifold is required).

To do this, disconnect the wiring harness to the sensor.

We pass the cap wrench on 22 through the wire.

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

Unscrewing the oxygen concentration sensor

Remove the oxygen concentration sensor from the exhaust manifold opening.

Moisten the nuts of the collector mounting with a penetrating liquid WD-40 or kerosene

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

With the head on 10, we turn off the nine nuts of fastening the exhaust manifold flange to the cylinder head

Removing the collector assembly with the lower heat shield

Removing the exhaust manifold of Nissan Almera with K4M engineRemoving the exhaust manifold of Nissan Almera with K4M engine

Removing the exhaust cylinder gasket

If the collector is to be replaced, then unscrew the five mounting nuts of the lower heat shield and remove it.

Before installing the collector, we clean all surfaces and inspect the parts.

Before tightening the nuts of the collector, we apply graphite grease to all the studs of the collector.

The nuts of the collector mounting are twisted sequentially from the center to the edge.

The tightening of the nuts should be a torque of - 18 Nm.