Removal and Installation
1 Of 2:
1. Ignition coil 11. Valve oil seal
2. Spark plug 12. Valve guide
3. Oil filler cap 13. Spark plug tube
4. PCV valve 14. Cylinder head bolt
5. Rocker cover 15. Cylinder head gasket
6. Rocker cover gasket 16. Valve seat (EXH)
7. O-ring 17. Valve (EXH)
8. Valve collet 18. Valve (INT)
9. Valve spring retainer 19. Valve seat (INT)
10. Valve spring 20. Cylinder head
REMOVAL
1. Perform the Fuel Pressure Release Procedure.
2. Drain engine coolant.
3. Drain engine oil.
4. Disconnect upper radiator hose and heater hose.
5. Position the RH engine compartment fuse and relay box aside.
6. Remove the engine undercovers using power tool.
7. Remove the resonator, air cleaner to electronic throttle control actuator tube and air cleaner case (upper).
8. Remove engine cover.
9. Disconnect the following harness connectors:
^ Engine coolant temperature sensor
^ Camshaft position sensor
^ EVAP canister purge volume control solenoid
^ Throttle control actuator
^ Swirl control valve solenoid
^ Variable timing control solenoid
10. Disconnect the brake booster vacuum hose.
11. Disconnect the fuel hose quick connector at the fuel tube side.
CAUTION:
^ Prepare a container and cloth for catching any spilled fuel.
^ This operation should be performed in a place that is free from any open flames.
^ While hoses are disconnected seal their openings with vinyl bag or similar material to prevent foreign material from entering them.
12. Remove the engine harness bracket and power steering hose bracket (collector side).
13. Remove the timing chain.
14. Remove drive belt auto-tensioner.
15. Remove the camshaft.
16. Remove spark plugs.
17. Remove the exhaust manifold.
18. Support the engine from above and underneath with suitable hoist and floor jack.
19. Remove the front suspension member for clearance to remove the oil pan by disconnecting the following:
^ Position the power steering pump and reservoir aside.
^ Remove auxiliary drive belts.
^ Dismount the A/C compressor and position it out of the way with wire.
^ Disconnect the upper sway bar links.
^ Remove the through bolts from the front and rear engine mounts.
^ Disconnect the lower ball joints.
^ Remove the two steering gear housing mounting bolts.
^ Remove crossmember bolts and remove crossmember.
20. Remove cylinder head loosening bolts in the order shown, using power tool.
21. If necessary to transfer to new cylinder head or remove for reconditioning, remove the intake manifold collector, intake manifold, and fuel tube assembly.
INSPECTION AFTER REMOVAL
Outer Diameter of cylinder Head Bolts
^ Cylinder head bolts are tightened by using the plastic zone (Torque-to-yeild) tightening method. Whenever the size difference between d1 and d2 exceeds the limit, replace the bolts with new ones.
- Subtract the head bolt diameter measurement taken at d2 from the head bolt diameter measurement taken at d1. If the difference between d1 and d2 exceeds the limit, replace the bolts with new ones.
Limit (d1 - d2): 0.23 mm (0.0091 inch) or less
^ If reduction of outer diameter appears in a position other than d2, use it as d2 point.
INSTALLATION
1. Install a new cylinder head gasket.
2. Follow the steps below to tighten the cylinder head bolts in the numerical order as shown.
CAUTION: If cylinder Head Bolts are re-used, check their outer diameters before installation.
Cylinder head bolts
Step 1: 98.1 Nm (10 kg-m, 72 ft. lbs.)
Step 2 (Loosen): 0 Nm (0 kg-m, 0 ft. lbs.)
Step 3: 34.3 - 44.1 Nm (3.5 - 4.4 kg-m, 26 - 32 ft. lbs.)
Step 4: 75° - 80° degrees rotation (target: 75° degrees) clockwise
Step 5: 75° - 80° degrees rotation (target: 75° degrees) clockwise
^ Apply new engine oil to the threads and the seating surfaces of mounting bolts.
CAUTION: Check and confirm the tightening angle by using angle wrench or protractor. Avoid judgment by visual inspection without the tool.
3. Installation of the remaining components is in reverse order of removal.