### Cylinder Head Cover

#### REMOVAL AND INSTALLATION

##### 1.6L (GA16DE) Engine

1. Disconnect the negative battery cable.
2. Remove the rocker arm cover mounting bolt in the reverse order of the tightening sequence and remove the cover.

   To install:

3. Using liquid sealant or equivalent, install the rocker cover and torque the bolts in sequence to 18–34 inch lbs. (2–4 Nm).
4. Install the remaining components. Refill and check all fluid levels.
5. Connect negative battery cable.
6. Start the engine and check for leaks.

   Fig. 1: Rocker arm cover torque sequence, loosen in the reverse order — 1.6L (GA16DE) engine

##### 2.0L (SR20DE) Engine

1. Disconnect the negative battery cable.
2. Remove the rocker cover and oil separator from the engine.

   To install:

3. Clean the rocker cover and mating surfaces and apply a continuous bead of liquid gasket to the mating surface.

   Fig. 2: Rocker arm cover torque sequence, loosen in the reverse order — 2.0L (SR20DE) engine

4. Install the rocker cover and oil separator. Tighten the rocker cover bolts as follows:
   1. Tighten nuts 1, 10, 11 and 8, in that order to 3 ft. lbs. (4 Nm).
   2. Tighten nuts 1–13 as indicated in the figure to 6–7 ft. lbs. (8–10 Nm).
5. Connect the negative battery cable.

##### 2.4L (KA24DE) Engine

Fig. 3: Rocker cover tightening sequence — Altima

1. Disconnect the negative battery cable.
2. Remove any vacuum hoses, fuel hoses, wires, harness, and connectors that are necessary for removal of the cylinder head cover.

   NOTE: If any fuel lines must be disconnected in order to remove the cylinder head cover, depressurize the fuel system first.

3. Disconnect the spark plug wires from the spark plugs.
4. Remove the cylinder head cover by loosening the bolts in the reverse order of installation.

   To install:

5. Install the cylinder head rubber plugs and the cylinder head cover. Tighten nuts No. 1–5–6–4, in that order, to 35 inch lbs. (4 Nm). Then tighten nuts No. 1–11 in sequence to 70–95 inch lbs. (8–11 Nm).
6. Reconnect the spark plug wires.
7. Install any vacuum hoses, fuel lines, wires and the harness connectors removed earlier.
8. Connect the negative battery cable.

##### 3.0L (VG30E) Engine

1. Disconnect the negative battery cable.
2. Remove the intake collector assembly (upper intake manifold).
3. Remove the cylinder head cover attaching bolts, then remove the cover from the cylinder head.

   To install:

4. Install the cylinder head cover onto the engine using a new gasket.
5. Install the intake manifold and collector assembly.
6. Connect the negative battery cable.

##### 3.0L (VE30DE and VQ30DE) Engines

Fig. 4: Right rocker cover torque sequence — 3.0L (VQ30DE) engine

Fig. 5: Left rocker cover torque sequence — 3.0L (VQ30DE) engine

1. Disconnect the negative battery cable.
2. Remove the left side rocker cover ornament.

   NOTE: Before disconnecting any hoses or connectors, note the locations for reassembly.

3. Remove the upper intake manifold assembly.
4. Disconnect and remove all six ignition coils from the spark plugs.
5. Remove the spark plugs.
6. Remove the cylinder head covers from the cylinder head.

   To install:

7. Apply a 0.12 inch (3mm) continuous bead of liquid gasket to the rocker covers and install the covers. Tighten the mounting bolts in sequence as follows:
   1. Bolts No. 1–10 — Tighten to 9–26 inch lbs. (1–3 Nm)
   2. Bolts No. 1–10 — Tighten to 52–69 inch lbs. (6–8 Nm)
8. Install the intake manifold collector gasket with the arrow facing forward.
9. Install the intake manifold collector assembly and related components.
10. Using new gaskets, install the cylinder head covers.
11. Install the spark plugs.
12. Install the ignition coils and tighten the mounting bolts to 27–33 inch lbs. (2.9–3.8 Nm).
13. Install the rocker cover ornament on the left side.
14. Connect the negative battery cable.

##### 3.0L (VG30DE and VG30DETT) Engines

1. Disconnect the negative battery cable.
2. Unbolt and remove the intake manifold collector from the intake manifold.

   NOTE: After the intake manifold collector has been removed, cover the openings on the intake manifold to prevent foreign objects from entering the combustion chamber.

3. Remove the ignition coils and spark plugs from the engine.
4. The fuel rail may need to be removed to gain access to the cylinder head cover mounting bolts.

   NOTE: If the fuel rail is to be removed, first depressurize the fuel system.

5. Remove the valve covers.

   To install:

6. Install the cylinder head covers. Use liquid sealant on the exhaust side of the valve cover.
7. If removed earlier, install the injector pipe (fuel rail) with fuel injectors to the intake manifold. Tighten the fuel rail and connect the fuel hoses using new clamps.
8. Using new gaskets, install the intake manifold collector and related components. Tighten the collector mounting bolts to 12–15 ft. lbs. (16–21 Nm).
9. Install the spark plugs and ignition coils.
10. Connect the negative battery cable.