Cylinder head — disassembly and assembly

Special tool

	Valve Spring Compressor 303-461 (21-194)
	Adapter for 303-461 303-461-01 (21-194-01)
	Pliers for valve stem seals 303-508 (21-211)

Disassembly

NOTE: Save all items for later assembly.

1. Remove the coolant circulation control unit.



2. Remove the front engine mount bracket.



3.

NOTE: Working in stages, loosen each camshaft bearing cap bolt two turns at a time.

Remove the camshaft bearing caps and camshaft.

• 1.Remove the camshaft bearing caps.
• 2. Remove the camshaft.

4. Remove the valve lifters.



5. Remove the hydraulic lash adjusters.



6. Install the camshaft and camshaft bearing caps.

• 1.Install the camshaft.
• 2. Install the camshaft bearing caps.

7. Using the special tool, remove the valve springs.

• Compress the valve spring.
• Remove the valve stem cotters, valve spring caps and valve springs.

8. Using the special tool, remove the valve stem seals.



9. Remove valves.

• 1.Remove the outlet valve.
• 2.Remove the inlet valve.

10. Remove the camshaft bearing caps and camshaft.

• 1.Remove the camshaft bearing caps.
• 2. Remove the camshaft.

Assembly

1. Install the camshaft and camshaft bearing caps.

• 1.Install the camshaft.
• 2. Install the camshaft bearing caps.

2. Install valves.

• 1.Install the outlet valve.
• 2.Install the inlet valve.

3.

NOTE: The valve stem seals are fully compressed by the pressure of the valve springs.

Using the special tool, install the valve stem seals.



4. Using the special tools, install the valve spring.

• Compress the valve spring and valve spring cap.
• Install the valve cotters.

5. Remove the camshaft bearing caps and camshaft.

• 1.Remove the camshaft bearing caps.
• 2. Remove the camshaft.

6. Install hydraulic lash adjusters.



7. Install the valve lifters.



8.

NOTE: The camshaft sprocket alignment slot must be in position "12 hours".

NOTE: Working in stages, tighten each camshaft bearing cap bolt two turns at a time.

Install the camshaft.



9. Install the front engine mount bracket.



10.

NOTE: If necessary, install a new coolant circulation control unit gasket.

Install the coolant circulation control unit.