Removal and Replacement
Cylinder Head
Removal
Both sides
1. With the vehicle in NEUTRAL, position it on a hoist. For additional information, refer to Maintenance/Service and Repair.
2. Drain the engine cooling system. For additional information, refer to Cooling System.
3. Remove the roller followers.
4. Rotate the accessory drive belt tensioner counterclockwise and remove the drive belt.
RH side
5. Remove the bolts and position the heater hose tube bracket aside.
6. Disconnect the battery ground cable. For additional information, refer to Battery.
7. Disconnect the generator electrical connections.
8. Remove the bolt and the accessory drive belt tensioner.
9. Remove the generator mounting bracket assembly.
10. Disconnect the heater hose from the thermostat housing.
11. Disconnect the engine coolant temperature (ECT) sensor electrical connector.
12. Disconnect the upper radiator hose from the thermostat housing.
13. Position the bypass hose clamp aside.
14. Remove the bolts and the thermostat housing.
15. Remove the bolt and position the engine wiring harness aside.
16. Remove the engine ground strap.
17. CAUTION: It is important to twist the spark plug wire boot while pulling upward to avoid damage to the spark plug wire.
NOTE: Spark plug wires must be connected to the correct spark plug. Mark the spark plug wires for installation reference.
With a twisting motion, use the special tool to pull the spark plug wires from the RH spark plugs.
18. Remove the RH exhaust manifold.
19. Remove the RH hydraulic timing chain tensioner.
20. Install the special tools.
^ Tighten to 10 Nm (89 lb-in).
21. Using the special tool with the Camshaft Sprocket Nut Socket 303-565, remove the RH camshaft bolt.
22. Remove the RH side cassette-to-cylinder head bolt.
23. CAUTION: Remove the camshaft sprocket from the timing chain to gain clearance to remove the cylinder head. Leaving the sprocket in place can damage the cassette and prevent the cylinder head from being removed.
NOTE: Hold the timing chain and cassette with a rubber band to aid in removal and to prevent the timing chain from falling into the cylinder block.
Remove the RH camshaft sprocket from the timing chain. Install a rubber band around the cassette and the timing chain.
LH side
24. Disconnect the radio ignition interference capacitor electrical connector.
25. Remove the ignition coil and bracket assembly-to-A/C compressor and power steering pump bracket bolts.
26. Remove the bolts and position the A/C compressor and power steering pump bracket aside.
27. Remove the ignition coil and bracket assembly-to-cylinder head bolts and the ignition coil and bracket assembly.
28. Remove the bolt and the oil level indicator tube.
29. Remove the LH exhaust manifold.
30. Remove the LH hydraulic timing chain tensioner.
31. Install the special tools.
^ Tighten the top clamp bolts to 10 Nm (89 lb-in).
32. Remove the LH side camshaft sprocket bolt.
33. Remove the LH timing cassette-to-cylinder head bolt.
34. CAUTION: Remove the camshaft sprocket from the timing chain to gain clearance to remove the cylinder head. Leaving the sprocket in place can damage the cassette and prevent the cylinder head from being removed.
NOTE: Hold the timing chain and cassette with a rubber band to aid in removal and to prevent the timing chain from falling into the cylinder block.
Remove the LH camshaft sprocket from the timing chain. Install a rubber band around the cassette and the timing chain.
Both sides
35. CAUTION: To avoid damage to the timing chain cassette, an assistant will be required to help lift the cylinder head from the vehicle.
CAUTION: On the RH side, when lifting the cylinder head, be careful to avoid contacting the A/C tube or the A/C tube can be damaged.
NOTE: New cylinder head bolts must be installed. They are a torque-to-yield design and cannot be reused.
Remove the cylinder heads.
^ Remove the cylinder head bolts in the sequence shown. Discard all bolts.
^ Remove and discard the head gasket.
36. CAUTION: Do not use metal scrapers, wire brushes, power abrasive discs or other abrasive means to clean the sealing surfaces. These tools cause scratches and gouges that make leak paths. Use a plastic scraping tool to remove all traces of the head gasket.
Clean and inspect the mating surfaces.
37. Inspect the cylinder head and the cylinder block for flatness.
Installation
Both sides
1. Clean the cylinder head bolt holes in the cylinder block. Make sure all coolant, oil or other foreign material is removed.
2. Position the cylinder head gasket on the block.
RH side
3. CAUTION: To avoid damage to the timing chain cassette, an assistant will be required to help position the cylinder head in the vehicle.
CAUTION: On the RH side, when lifting the cylinder head, be careful to avoid contacting the A/C tube or the A/C tube can be damaged.
NOTE: New cylinder head bolts must be installed. They are a torque-to-yield design and cannot be reused.
Install the cylinder head. Install 8 new 12-mm bolts and tighten in the sequence shown in 2 stages.
^ Stage 1: Tighten to 12 Nm (9 lb-ft).
^ Stage 2: Tighten to 25 Nm (18 lb-ft).
4. Install 2 new 8-mm bolts.
^ Tighten to 32 Nm (24 lb-ft).
5. Tighten the eight 12-mm bolts in the sequence shown in 2 stages.
^ Stage 1: Tighten 90 degrees.
^ Stage 2: Tighten an additional 90 degrees.
6. CAUTION: The camshaft gear must turn freely on the camshaft. DO NOT tighten the bolt at this time. Tightening the bolt can result in incorrect engine timing.
Remove the rubber band. Install the camshaft sprocket and bolt.
7. Install the RH timing cassette-to-cylinder head bolt.
^ Tighten to 10 Nm (89 lb-in).
8. Install the RH exhaust manifold.
9. NOTE: Apply silicone brake caliper grease and dielectric compound to the inside of the spark plug boots.
Connect the spark plug wires to the RH spark plugs.
10. Install the engine ground strap and the bolt.
^ Tighten to 10 Nm (89 lb-in).
11. Position the engine wiring harness and install the bolt.
^ Tighten to 47 Nm (35 lb-ft).
12. NOTE: Inspect the O-ring seal. Install a new O-ring seal if necessary.
Install the thermostat housing and the bolts.
^ Tighten to 11 Nm (8 lb-ft).
13. Position the coolant bypass hose clamp.
14. Install the upper radiator hose to the thermostat housing.
15. Connect the engine coolant temperature (ECT) sensor electrical connector.
16. Connect the heater hose to the thermostat housing.
LH side
17. CAUTION: To avoid damage to the timing chain cassette, an assistant will be required to help position the cylinder head in the vehicle.
NOTE: New cylinder head bolts must be installed. They are a torque-to-yield design and cannot be reused.
Install the cylinder head. Install 8 new 12-mm bolts and tighten in the sequence shown in 2 stages.
^ Stage 1: Tighten to 12 Nm (9 lb-ft).
^ Stage 2: Tighten to 25 Nm (18 lb-ft).
18. Install 2 new 8-mm bolts.
^ Tighten to 32 Nm (24 lb-ft).
19. Tighten the eight 12-mm bolts in the sequence shown in 2 stages.
^ Stage 1: Tighten 90 degrees.
^ Stage 2: Tighten an additional 90 degrees.
20. CAUTION: The camshaft gear must turn freely on the camshaft. DO NOT tighten the bolt at this time. Tightening the bolt can result in incorrect engine timing.
Remove the rubber band. Install the camshaft sprocket and bolt.
21. Install the LH timing cassette-to-cylinder head bolt.
^ Tighten to 12 Nm (9 lb-ft).
22. Install the LH exhaust manifold.
23. NOTE: Apply silicone brake caliper grease and dielectric compound to the inside of the spark plug boots.
Connect the spark plug wires to the LH spark plugs.
24. Install the oil level indicator tube and the bolt.
^ Tighten to 10 Nm (89 lb-in).
Both sides
25. Time the camshafts.
RH side
26. Install the generator mounting bracket assembly and the bolts.
^ Tighten to 42 Nm (31 lb-ft).
27. Position the accessory drive belt tensioner and install the bolt.
^ Tighten to 47 Nm (35 lb-ft).
28. Connect the generator electrical connections.
^ Tighten to 8 Nm (71 lb-in).
29. Connect the battery ground cable. For additional information, refer to Battery.
30. Position the heater hose tube bracket and install the bolts.
^ Tighten the rear bolt to 23 Nm (17 lb-ft).
^ Tighten the front bolt to 34 Nm (25 lb-ft).
LH side
31. Position the ignition coil and bracket assembly and install the bracket-to-cylinder head bolts.
^ Tighten to 10 Nm (89 lb-in).
32. Position the A/C compressor and power steering pump bracket and install the bolts.
^ Tighten to 42 Nm (31 lb-ft).
33. Install the ignition coil bracket-to-A/C compressor and power steering pump bracket bolts.
^ Tighten to 10 Nm (89 lb-in).
34. Connect the radio ignition interference capacitor electrical connector.
Both sides
35. Rotate the accessory drive belt tensioner counterclockwise and install the accessory drive belt.
36. Fill and bleed the engine cooling system.