Removal and Disassembly
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 section describes the removal of the camshaft, rocker arms and hydraulic lash adjusters.
Camshaft Removal
- Release fuel pressure.
- 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. 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.
g. Remove camshaft.
Loosen and remove the camshaft bolts following the order shown in the image.
Be sure to mark the camshaft bracket installation position before removing the camshaft.
4. Remove rocker arms.
5. Remove hydraulic lash adjusters.
Camshaft Installation
- Install in reverse order of removal.
- Install camshaft knock pins in the positions shown in the image.
- Tightening procedure
- Tighten the camshaft brackets in the following steps.
- Tighten in numerical order shown in the image.
Cylinder Head Assembly Removal
1. Remove engine assembly from vehicle.
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.
- 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 image and remove cylinder head.
16. Remove cylinder head gaskets.
Disassembly
1. Remove camshaft bracket.
Loosen and remove bolts following the order shown in the image.
Mark the installation position before removing camshaft bracket.
Inspect camshaft end play before loosening camshaft bracket bolts.
2. Remove camshaft.
3. Remove rocker arm.
4. Remove hydraulic lash adjuster. If hydraulic lash adjuster is kept on its side, there is a risk of air entering it. After removal, always set hydraulic lash adjuster in upright position. Otherwise, place it in a container of engine oil when laying it on its side.
- Do not disassemble hydraulic lash adjuster.
- Attach tags to valve lifters so as not to mix them up.
5. Remove valve collets. Use valve spring compressor (suitable tool) and remove valve collets.
6. Remove valve spring retainers, valve springs and valve spring seats.
7. Remove valves. Before removing valves, inspect gap between valve guides and check valve stem protrusion distance.