Disassembly and Assembly of Subassemblies

Cylinder Head





Special Tool(s)





Material





Disassembly





1. Using the special tools, compress the valve spring and remove the valve spring retainer keys.





2. Remove the valve spring retainer, the valve spring, the valve stem seal and valve.
- Discard the valve seal.

3. Repeat the above steps and remove all of the valve springs, valve stem seals and valves.





4. Install the special tools on the camshaft.
5. Remove the camshaft sprocket bolt, washer and the camshaft sprocket.
6. Remove the special tool from the camshaft.
7. Remove the camshaft sprocket spacer.
8. Remove the camshaft bearing cap bolts, camshaft bearing caps and the camshaft.





9. Clean and inspect the camshaft bearing caps.
- One of the bearing caps contains an oil flow restriction groove. Make sure the groove is free of foreign material.





10. NOTE: The hydraulic lash adjusters are positional. Mark each hydraulic lash adjuster for installation in its original location.

Remove the hydraulic lash adjusters.

Assembly





1. Install the hydraulic lash adjusters in their original locations.
- Lubricate the hydraulic lash adjusters with clean engine oil prior to installation.





2. Lubricate the camshaft journals with clean engine oil.





3. Install the camshaft and the camshaft bearing caps in their original locations.
- Lubricate the camshaft bearing caps with clean engine oil.
- Lubricate the camshaft journals and lobes with clean engine oil.
- 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 sprocket spacer, sprocket, washer and bolt.
1. Position the spacer, sprocket, washer and bolt.
2. Tighten the bolt in 2 stages:
- Stage 1: Tighten to 40 Nm (30 ft. lbs.).
- Stage 2: Tighten an additional 90 degrees.





6. Using the special tools, install new valve seals.





7. Install the special tool between the valve spring coils to protect the valve stem seal from damage.





8. Using the special tool, install the valve spring, the spring retainer and the valve spring retainer keys.
9. Repeat the above steps and install all of the valve spring, the spring retainer and the valve spring retainer keys.