Overhaul

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CYLINDER HEAD DISASSEMBLY/ASSEMBLY - HYBRID










Disassembly

CAUTION: If the components are to be reinstalled, mark the location of the components removed, they must be installed in the same location.

1. Remove the 2 bolts and the exhaust gas recirculation (EGR) valve.

- Discard the gasket.

2. Remove the 4 bolts and the coolant outlet.

- Discard the gasket.

3. Remove and discard the cylinder head temperature (CHT) sensor.

4. Remove the spark plugs.

CAUTION: Only use hand tools when removing or installing the spark plugs or damage can occur to the cylinder head or spark plugs.

5. Remove the valve tappets.






6. Using the special tools, compress the valve springs and remove the valve collets, valve spring retainers and the valve springs.


NOTE: Use a small screwdriver and grease to remove the valve collets.

7. Inspect the components, if necessary. See - Specifications.

8. Remove the valves.






9. Using the special tools, remove and discard the valve seals.

10. Inspect the valves. See Valve Inspection. Install new parts, as necessary.

Assembly

1. Install the valves.


NOTE: Coat the valve stems with clean engine oil.






2. Using the special tool, install the valve seals.


NOTE: Use the protector provided with the replacement kit to prevent damage to the valve seals. Lubricate the valve stems and guides with clean engine oil.






3. 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.


NOTE: Check the seating of the valve collets.

4. Install the valve tappets.


NOTE: Coat the valve tappets with clean engine oil.

5. Install the spark plugs.

- Tighten to 12 Nm {1.2 kgf-m, 9 ft-lbf}.

CAUTION: Only use hand tools when removing or installing the spark plugs or damage can occur to the cylinder head or spark plugs.

6. Install a new CHT sensor.

- Tighten to 12 Nm {1.2 kgf-m, 9 ft-lbf}.

7. Using a new gasket, install the coolant outlet and bolts.

- Tighten to 10 Nm {1.0 kgf-m, 89 in-lbf}.

8. Install the EGR valve, using a new gasket.

- Tighten to 20 Nm {2.0 kgf-m, 15 ft-lbf}.