Overhaul

Cylinder Head

Special Tool(s):

Material:

Disassembly

1. CAUTION: Do not remove the camshaft before removing the roller followers.

CAUTION: Place cylinder head on a cardboard or wood surface to prevent damage to the joint face.

Install the special tool between the valve spring coils to prevent valve stem seal damage.





2. NOTE: The roller followers must be reinstalled in their original locations. Record roller follower locations.

Use the special tool to compress the valve springs, and remove the roller followers.





3. NOTE: The hydraulic lash adjusters must be installed in their original locations. Record hydraulic lash adjuster locations.

Remove the hydraulic lash adjusters.





4. Use the special tool to compress the valve springs.





5. CAUTION: Keep valves and valve spring retainer keys in order so they can be installed in the same positions.

Remove the valve spring retainer keys, the valve spring retainers, the valve springs and the valves.





6. Remove the valve stem seals.





7. NOTE: The camshaft bearing caps must be installed in their original location. Record camshaft bearing cap location.

Remove the bolts, the bearing caps and the camshaft.





Assembly

1. NOTE: Do not use metal scrapers or other tools to clean the cylinder head.

Use a plastic scraper and metal surface cleaner to clean the cylinder head.
2. Lubricate the camshaft journals with clean engine oil.





3. Install the camshaft and the camshaft bearing caps.
^ Lubricate with clean engine oil and position the camshaft bearing caps.
^ Install the bolts loosely.





4. Tighten the bolts in the sequence shown.
^ Tighten to 10 Nm (89 inch lbs.)





5. Install the valves in the valve guides located in the cylinder head.





6. Use the special tool to install the valve stem seals.





7. Install the valve springs and the valve spring retainers onto the valves.





8. Install the special tool between the valve spring coils to prevent valve stem seal damage.





9. Use the special tool to compress the valve springs, and install the valve spring retainer keys.





10. Install the hydraulic lash adjusters in their original locations.





11. Using the special tool, install the roller followers in their original locations.





12. Remove the special tool.