Cylinder Head: Disassembly
- Remove the bolts and the variable camshaft timing (VCT) housing.
- Discard the gasket.
- Lubricate the camshaft and camshaft journals with clean engine oil and install the camshaft.
- 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 bolts finger tight.
- Using the special tool, compress the valve spring and remove the valve spring retainer keys.
- Remove the valve spring retainer, the valve spring and the valve seal.
- Discard the valve seal.
- Remove the valve from the cylinder head
- Repeat the previous 3 steps for each valve.
- Inspect the components. For additional information, refer to ENGINE SYSTEM - GENERAL INFORMATION article.
- Remove the bolts the front camshaft bearing cap and then the remaining bearing caps.
- Remove the camshaft.
- Check the cylinder head for distortion. For additional information, refer to ENGINE SYSTEM - GENERAL INFORMATION article.
CAUTION:
When removing the front thrust camshaft bearing cap, use care as the cap may be damaged from side loading when removing the cam unequally in height from the bearing towers.