Removal and Installation

CYLINDER HEAD

CAUTION:
- When installing camshafts, chain tensioners, oil seals, or other sliding parts, lubricate contacting surfaces with new engine oil.
- Apply new engine oil to threads and seat surfaces when installing cylinder head, camshaft sprocket, crankshaft pulley, and camshaft bracket.






Removal

Note: The cylinder head assembly removal and installation should be performed after removing the engine assembly. This describes the removal of the camshaft, rocker arms and hydraulic lash adjusters.

Camshaft Removal
- Release fuel pressure. Refer to Powertrain Management.
- Remove ornament cover.
- Remove under cover.
- Remove radiator.
- Remove cooling fan.
- Remove water inlet and outlet.
- Remove alternator belt.
- Remove alternator belt idler bracket.
- Remove air duct.
- Remove intake manifold collector.
- Remove intake valve timing control solenoid valve.
1. Remove left rocker cover.
a. Remove vacuum pipe.
b. Remove main harness from bracket and move where it will not interfere with camshaft removal.
c. Remove all ignition coils and spark plugs.
d. Remove blowby hoses from rocker covers.
e. Remove rocker cover bolts.
2. Remove right rocker cover.
a. Remove power steering oil reservoir tank bolts so tank is loose.
b. Separate fuel pipes.
c. Remove engine slinger.
d. Separate blowby hoses from rocker covers.
e. Remove all ignition coils and spark plugs.
f. Remove rocker cover bolts.
3. Remove camshaft.
a. Set No. 1 piston to TDC on compression stroke.
b. Remove camshaft position sensor.
c. Remove front cover upper.
d. Mark the timing chain links so they correspond to the camshaft sprocket and idler sprocket mating marks.
e. Remove chain tensioner.
f. Remove camshaft sprocket.
Refer to TIMING CHAIN for procedures (a) to (f).








g. Remove camshaft.
Loosen and remove the camshaft bolts following the order shown in the figure.
Be sure to mark the camshaft bracket installation position before removing the camshaft.
4. Remove rocker arms.
5. Remove hydraulic lash adjusters. Refer to Cylinder Head Assembly; Service and Repair; Disassembly and Reassembly.

Camshaft Installation
- Install in reverse order of removal. Refer to Installation.





- Install camshaft knock pins in the positions shown in the figure.








- Tightening procedure
Tighten the camshaft brackets in the following steps.
- Tighten in numerical order shown in the figure.

Cylinder Head Assembly Removal
1. Remove engine assembly from vehicle. Refer to Engine; Service and Repair.
2. Remove exhaust manifold.
3. Drain all coolant from drain plugs on left and right side of cylinder block.
4. Remove the following parts.
- Intake manifold collector.
- Ignition coil sub-harness.
- Ignition coils.
- Spark plugs.
5. Remove fuel tube assembly.
6. Remove intake manifold.
7. Remove rocker cover.
8. Set No. 1 position at TDC on compression stroke.
9. Remove camshaft position sensor.
10. Remove front cover upper.
11. Remove chain tensioner.
12. Remove camshaft sprocket.
13. Remove idler sprocket bolt. Refer to TIMING CHAIN for procedures 5 to 13.
- Apply paint to camshaft and idler sprockets for alignment during installation.





14. Remove cylinder head sub-bolts.
Be careful during installation because the bolt (indicated by the arrow) dimensions is different from others.








15. Loosen cylinder head bolts following the order shown in the figure and remove cylinder head.
16. Remove cylinder head gaskets.

Cylinder Head Assembly Installation





1. Install cylinder head gaskets.
Remove all oil and debris from the cylinder head and block mating surfaces.
Always use new gaskets.
Refer to the figure to determine the difference between left and right gaskets.





2. Install cylinder heads.
Check that camshaft key and camshaft knock pins are located in positions shown in the figure. Install cylinder heads on block. Be careful not to damage or scratch cylinder head gaskets during installation.
3. Tighten cylinder head bolts.
- Lubricate threads and seat surfaces of the bolts with new engine oil.








- Tightening procedure
Tighten bolts to 29 Nm (3.0 kg.m, 22 ft. lbs.).
Tighten bolts to 93 Nm (9.5 kg.m, 69 ft. lbs.).
Loosen bolts completely.
Tighten bolts to 25 to 34 Nm (2.5 to 3.5 kg.m, 18 to 25 ft. lbs.).
Turn bolts 90 to 95 degrees clockwise.





- Install the washer with non-chamfered side facing the cylinder head.





4. Install cylinder head sub-bolts.
Tightening Torque: 6.3 - 8.3 Nm (0.64 - 0.85 kg.m, 55.6 - 73.8 inch lbs.)
The bolts indicated by arrow marks in the figure have different dimensions [C = 35 mm (1.38 inch)] than the other bolts [f = 23 mm (0.91 inch)]. Make sure bolt length and location correspond.
5. Install idler sprocket bolts.
6. Install camshaft sprocket.
7. Install chain tensioner.
8. Install front cover upper.
Refer to TIMING CHAIN for explanation of above procedures.
9. Install rocker cover gasket in rocker cover groove.
Always use a new gasket.
a. Remove all oil and debris from the gasket and cylinder head mating surfaces.





b. Apply a continuous bead of liquid gasket to gasket arch in the dimensions shown in the figure.
- Use Genuine RTV silicone sealant part No. 999MP-A7007 or equivalent.





c. Apply a continuous bead of liquid gasket to where rubber plugs are inserted in cylinder head and mating surfaces of front cover and mating surfaces of front cover and cylinder head as shown in figure.
- Use Genuine RTV silicone sealant part No. 999MP-A7007 or equivalent.








10. Install RH and LH rocker covers.
Rocker cover tightening procedure:
- Tighten in numerical order as shown in the figure.
a. Tighten bolts 1 to 16 in that order to 4 to 6 Nm (0.4 to 0.6 kg.m, 35 to 52 inch lbs.).
b. Tighten bolts 1 to 16 as indicated in figure to 7 to 9 Nm (0.7 to 0.9 kg.m, 61 to 78 inch lbs.).
c. Tighten bolts (1) and (2) to 7 to 9 Nm (0.7 to 0.9 kg.m, 61 to 78 inch lbs.).





11. Install intake valve timing control solenoid valve.
Always replace the two O-rings with new parts.
Check that there is no debris or foreign matter in the end of the intake valve timing control solenoid valve.
Coat the O-rings with engine oil.
Tightening Torque: 25 - 34 Nm (2.5 - 3.5 kg.m, 18 - 25 ft. lbs.)
12. Install in the reverse order or removal thereafter.