See also:

Cylinder head - removal and refitting
Removal Note: On HCS engines, cylinder head bolts may be used a total of three times (including initial fit) and must be suitably marked to indicate each removal operation. A new cylinder head ga ...

Central (single-point) Fuel Injection (CFI) system
The system is best described by dividing it into four separate sub-systems: air, fuel, engine management (EEC IV system), and ignition. ...

Ignition timing (OHC models) - adjustment
Note: During production the ignition timing is accurately set using a microwave process, and sealant is applied to the distributor clamp bolt. Because the electronic components require no maintena ...