How do I set its top{ top specification - Optra Chevrolet Cars & Trucks

ck here....

https://www.youtube.com/watch?v=nWdmNozRMq0

The correct head and block settings for an Isuzu KB 260 4ZE1 petrol engine will depend on the specific model and year of your vehicle. It is generally recommended to refer to the manufacturer's specifications or a repair manual for the specific head and block torque settings for your engine.
In general, the head bolts on an Isuzu 4ZE1 engine should be tightened in a specific sequence and to a specific torque specification. The block bolts should also be tightened in a specific sequence and to a specific torque specification.
It is important to follow the manufacturer's specifications and torque the head and block bolts to the correct specification to ensure proper engine function and to prevent damage. If you are unsure about the correct head and block settings for your engine, it is recommended to seek the assistance of a professional mechanic or refer to the manufacturer's specifications.

go google and type in-- torque specifications for ford figo 1.4 L ther will be pages top download and to show correct tightening sequence

hydraulic followers should not need adjustment as it is automatically done by the oil pressure in the followers.

changing the settings in an ECM cpu program is a specialised process using a lap top with a specific tuning program that alters the settings and parameters of all the sensors. I would advise taking it to an accredited specialist and have it done properly.

timing is always before top dead centre . Check the specifics but generally 10-15 degrees bftdc

10 Degrees before top dead center,

*Base timing specification
*Set at warm idle speed (electronically controlled -
not adjustable)
*Disconnect single wire spout connector (yellow/light
green) or remove shorting bar on double wire spout
connector at ignition module (terminal #5)
*All accessories off
Automatic in PARK or Manual in NEUTRAL and parking brake set.

Yes, it comes out the top. A 3/8 inch drive metric socket set will do. Depending on which engine you have (overhead cam? dual overhead cam?) and transmission (manual or auto), you may need to remove some parts to gain access. I can be more specific if you give me specifics on the engine and trans. I also recommend you browse my post at http://www.fixya.com/cars/r5973094-starter_replace.

Injectors from the same ccm engine are most probably sounds same but to be on the safe side check not only the shape but code on the top of injector too. Because they are piezo effect injectors and set by the manufacture for a specific pressure for specific engine codes.