BELT IDLER AND AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY
Remove the belt idler (No. 1).
Scheme 153
Remove the automatic belt tension adjuster assembly.
Scheme 154
AUTOMATIC BELT TENSION ADJUSTER ASSEMBLY AND BELT IDLER
Preparation for installation of automatic belt tension adjuster assembly.
| IMPORTANT | Always use a vertical type pressing tool to move the adjuster rod down. Do not use a lateral type vise. Push the adjuster rod vertically. Press-in the push adjuster rod gradually taking more than three minutes. Do not allow press pressure to exceed 9,807 N (1,000 kgf, 2,205 lb). Press the adjuster rod as far as the end surface of the cylinder. Do not press the adjuster rod into cylinder. Doing so may damage the cylinder. Do not release the press pressure until stopper pin is completely inserted. |
Attach the automatic belt tension adjuster assembly to the vertical pressing tool.
Slowly move the adjuster rod down with a pressure of 294 N (30 kgf, 66 lb) until the adjuster rod is aligned with the stopper pin hole in the cylinder.
Scheme 155
With a 2 mm (0.08 in) dia. stopper pin or a 2 mm (0.08 in) (nominal) dia. hex wrench inserted into the stopper pin hole in cylinder, secure the adjuster rod.
Scheme 156
Install the automatic belt tension adjuster assembly.
Tightening torque
39 Nm (4.0 kgf-m, 28.9 ft -lb)
Scheme 157
Install the belt idler (No. 1).
Tightening torque
39 Nm (4.0 kgf-m, 28.9 ft -lb)
Scheme 158
DISASSEMBLY
Remove the bolts which secure the rocker shaft.
Extract the rocker shaft. Remove the valve rocker arms, springs and shaft supports from rocker shaft.
Note. Keep all the removed parts in order for re-installing in their original positions.
Remove the nut and adjusting screw from valve rocker.
ASSEMBLY
Install the adjusting screw and nut to valve rocker.
Arrange the valve rocker arms, springs and shaft supports in assembly order, and then insert the valve rocker shaft.
Tightening torque (Shaft supports installing bolts)
5 Nm (0.5 kgf-m, 3.6 ft-lb)
Note. Valve rocker arms, rocker shaft and shaft supports have identification marks. Ensure the parts with same markings are properly assembled.
Install the valve rocker shaft securing bolts.
Place the cylinder head on the ST.
ST 32005098 CYLINDER HEAD TABLE
Set the ST on valve spring. Compress the valve spring and remove the valve spring retainer key. Remove each valve and valve spring.
ST 32005143 VALVE SPRING REMOVER
Note. Keep all the removed parts in order for re-installing in their original positions. Mark each valve to prevent confusion. Use extreme care not to damage the lips of the intake valve oil seals and exhaust valve oil seals.
Scheme 159
- Valve
- Valve guide
- Valve spring seat
- Oil seal
- Valve springs
- Retainer
- Retainer key
- Spark plug gasket
- Camshaft
- Oil seal
- Plug
- Camshaft cap
- Valve rocker ASSY
Installation of valve spring and valve
Place the cylinder head on the ST.
ST 32005098 CYLINDER HEAD TABLE
Coat the stem of each valve with engine oil and insert the valve into valve guide.
| IMPORTANT | Use extreme care not to damage the oil lips when inserting the valve into valve guide. |
Install the valve spring and retainer.
Note. Be sure to install the valve springs with their close-coiled end facing the seat on the cylinder head.
Set the ST on valve spring.
ST 32005143 VALVE SPRING REMOVER
Scheme 160
Compress the valve spring and fit the valve spring retainer key.
Scheme 161
- Retainer key
- Valve springs
After installing, tap the valve spring retainers lightly with a plastic hammer for better seating.