Overhaul

Cylinder Head

















Disassembly

1. Remove the 2 bolts and the Variable Camshaft Timing (VCT) housing.
- Discard the gasket.

2. Lubricate the camshaft and camshaft journals with clean engine oil and install the camshaft.

3. Install the camshaft bearing caps in their original locations.
- Lubricate the camshaft bearing caps with clean engine oil.

- Position the front camshaft bearing cap.

- Position the remaining camshaft bearing caps.

- Install the 10 bolts finger-tight.

4. Using the Valve Spring Compressor, compress the valve spring and remove the valve spring retainer keys.





5. Remove the valve spring retainer, the valve spring and the valve seal.
- Discard the valve seal.

6. Remove the valve from the cylinder head.

7. Repeat the previous 3 steps for each valve.

8. Inspect the components.

9. NOTICE: Remove the front thrust camshaft bearing cap straight upward from the bearing towers, or the bearing cap may be damaged from side loading.

Remove the 10 bolts, the front camshaft bearing cap and then the remaining bearing caps.

10. Remove the camshaft.

11. Check the cylinder head for distortion.

Assembly

1. Lubricate the camshaft and camshaft journals with clean engine oil and install the camshaft.

2. Install the camshaft bearing caps in their original locations.
- Lubricate the camshaft bearing caps with clean engine oil.

- Position the front camshaft bearing cap.

- Position the remaining camshaft bearing caps.

- Install the 10 bolts finger-tight.

3. NOTE: Lubricate the valve stem with clean engine oil prior to installation.

Install the valve into the cylinder head.

4. NOTE: Lubricate the valve seal and valve stem with clean engine oil prior to installation.

Position a new valve seal onto the valve stem.

5. Using the Valve Stem Oil Seal Installer, install the new valve seal.





6. NOTICE: If the components are to be reinstalled, they must be installed into their original locations. Failure to follow these instructions may result in engine damage.

Using the Valve Spring Compressor, install the valve spring, the valve spring retainer and the valve spring retainer keys.





7. Repeat the previous 2 steps for each valve.

8. Remove the 8 bolts, the front camshaft bearing cap and then the remaining bearing caps.

9. Remove the camshaft.

10. Install a new gasket, the VCT housing and the 2 bolts.
- Tighten to 10 Nm (89 lb-in).