For 1990-2009 cars

1. Apply clean engine oil to the following components:

• | The rocker-arm shaft

• | The rocker Arms (1, 2)

2. After applying the engine oil to the rocker-arm shafts and to the rocker arms, do the following.Carefully slide the rocker-arm shaft into the cylinder head with the holes facing up while installing the exhaust rocker-arms and the springs in the correct sequence.
3. Install the rocker-arm shaft bolts (1).

Tighten
Tighten the rocker-arm shaft bolts to 11 N·m (97 lb in).

4. Install the intake rocker arms (1) onto the rocker-arm shaft in the correct sequence.