Withdrawal
1. Remove the cylinder head cover (see Section Removal and installation of covers of heads of cylinders).
2. Bring the piston of the first cylinder to the TDC position (see Section Bringing the piston of the first cylinder to the top dead center position (TDC)), remove the timing belt (see Section Removing, checking the condition and installing the gas distribution belt and timing gears).
3. Loosen the rocker axle bolts 1/4 turn (to weaken the force developed by the valve springs), - proceed in the reverse order shown in the illustration.
4. Remove the rocker shaft assembly from the cylinder head. Do not turn out the fixing bolts completely in order to fix the assembly components on the axis.
Examination
1. Having removed the rocker arm assembly, it would be wise to disassemble it in order to examine the condition of the components in more detail. Turn out fixing bolts and remove from axes of a yoke and a spring. It would be wise to pre-mark the position of the axle in relation to the bearing caps.
Attention! It would be wise to fasten the rocker arms of the primary and secondary intake valves with rubber bands. Try to fold the removed components in the order of their installation, since during assembly they must be planted strictly in their original places.
2. Thoroughly clean the components and inspect them for signs of wear and mechanical damage. Evaluate the condition of the surfaces of the rocker arms in contact with the camshaft, evaluate the degree of wear and freedom of rotation of the rollers. Check for nicks and signs of excessive wear on the rocker arm mounting surfaces on the axles, as well as the walls of the rocker arm mounting holes. Defective components must be replaced. Make sure that the oil flows inside the axles are passable.
3. Remove the valve clearance adjusters from their seats in the cylinder head and clean them thoroughly. Use your fingers to check the freedom of movement of the plungers.
4. Check up freedom of a course of the synchronizing pistons in assemblies of a drive of inlet valves.
Installation
1. Lubricate all components with clean engine oil and install them in their regular places on the rocker shaft.
Attention! Pay attention to the markings that distinguish left-handed components from right-handed ones.
2. Lubricate the working surfaces of the rocker arms with a special lubricant for camshafts. Place the removed components on the axle, then install the assembly on the motor.
3. In a strictly defined order in several stages (with a small step) tighten bolts of fastening of assembly of yokes with the demanded effort.
4. Install the remaining components in the reverse order of their dismantling.
5. In conclusion, do not forget to adjust the valve clearances (if there is a need) (see chapter Settings and ongoing maintenance).
6. Start the engine and check for signs of oil leaks and normal operation.