Disassembly
| CAUTION | If the components are to be reinstalled, they must be installed in the same positions. Mark the components removed for locations. |
- Remove the 4 bolts and the coolant outlet. Discard the gasket.
- Remove the 2 bolts and the exhaust gas recirculation (EGR) valve. Discard the gasket.
- Remove and discard the cylinder head temperature (CHT) sensor.
- Remove the spark plugs.
- Remove the valve tappets.
- Using the special tools, compress the valve springs and remove the valve collets, valve spring retainers and the valve springs.
- Inspect the components, if necessary. For additional information, refer to «ENGINE SYSTEM-GENERAL INFORMATION»(ref-232214) .
- Remove the valves.
- Using the special tools, remove and discard the valve seals.
- Inspect the valves. For additional information, refer to «ENGINE SYSTEM-GENERAL INFORMATION»(ref-232214) . Install new parts, as necessary.
Assembly
- Install the valves.
- Using the special tool, install the valve seals.
- Using the special tools, install the valve springs. Insert the valve springs and the valve spring retainers. Compress the valve springs and install the valve collets, using grease and a small screwdriver.
- Install the valve tappets.
- Install the spark plugs. Tighten to 15 Nm (11 lb-ft).
- Install a new CHT sensor. Tighten to 12 Nm (9 lb-ft).
- Install the EGR valve, using a new gasket. Tighten to 25 Nm (18 lb-ft).
- Using a new gasket, install the coolant outlet and bolts. Tighten to 25 Nm (18 lb-ft).