1 – rocker B; 2 – rocker A; 3 – rocker shaft springs; 4 – intake valve rocker shaft; 5 – exhaust valve rocker shaft.
Removal
1. Remove the wide hose and the crankcase ventilation valve.
2. Remove the timing belt cover.
3. Remove the cylinder head cover.
4. Remove the bolts and remove the rocker arm shaft, rocker arms and springs as an assembly.
5. Remove the bolts and rocker arms from the shaft.
Examination
1. Check the ease and smoothness of the roller rotation.
2. Check the end of the valve stem. If the end of the stem is worn or riveted, replace the valve.
3. Check the surfaces of the hydraulic valve lash adjusters that contact the valve stem. If the surface is worn or damaged, replace the hydraulic valve lash adjusters.
Rocker shaft
1. Check the rocker arm shafts for damage.
2. Check the grease feed hole for cleanliness.
Installation
1. Install the rocker arms and springs onto the rocker shaft. Install the rocker shaft onto the cylinder head and secure with bolts, tightening them to the specified torque.
Tightening torque: 20–27 Nm
2. When installing rocker arms, shafts and springs, pay attention to the difference between rocker arms A and rocker arms B.
3. Install the cylinder head cover and secure with bolts, tightening them to the required torque.
Tightening torque: 8–10 Nm
Installation
Warning: Before installing the cylinder head cover, apply a layer of sealant to the mating surface of the cylinder head.
1. Apply a thin layer of sealant, otherwise it will be squeezed under the cylinder head cover and may interfere with the operation of the valve drive mechanism.
2.Use only sealant #1212D or equivalent.
3. Install the timing belt cover.
Tightening torque: 10–12 Nm
4. Install the air filter.
5. Install the wide hose and crankcase ventilation valve.