Valve Spring: Service and Repair

Camshaft, Valve Springs and Valve Seals





Special Tool(s)





Material

1. NOTE: This step is necessary for camshaft removal and installation only.

Remove the engine front cover, timing gears, chain and tensioners.
2. Remove the valve covers.
3. Remove the roller followers.
4. Remove the spark plugs.

5. NOTE: LH is shown, RH is similar.

Remove the parts in the order indicated in the illustration and table.








To remove individual parts, only carry out the listed steps:

6. To install, reverse the removal procedure.

Items 1-4: Exhaust Valve Spring Retainer Keys, Valve Springs and Valve Seals Removal Note

NOTE: Carry out the steps for each cylinder requiring service.

1. NOTE: Position the piston of the cylinder to be serviced at the bottom of the stroke.





Use compressed air in the cylinder to be serviced to hold both valves in position.





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





3. Using the special tool, compress the exhaust valve spring. Remove the exhaust valve spring retainer keys.

4. NOTE: Valve stem seals should be visually inspected if new seals are not installed.





Remove the special tool, the valve spring retainer, the valve spring and the valve stem seal.

Items 5-8: Intake Valve Spring Retainer Keys, Valve Springs and Valve Seals Removal Note

NOTE: Carry out the steps for each cylinder requiring service.

1. NOTE: Position the piston of the cylinder to be serviced at the bottom of the stroke.





Use compressed air in the cylinder to be serviced to hold both valves in position.





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





3. Using the special tool, compress the intake valve spring. Remove the intake valve spring retainer keys.

4. NOTE: Valve stem seals should be visually inspected if new seals are not installed.





Remove the special tool, the valve spring retainer, the valve spring and the valve stem seal.

Items 11-9: Camshaft Bearing Caps Installation Note

1. NOTE: LH is shown, RH is similar.





Install the camshaft bearing caps and tighten the fasteners in the sequence shown.

Items 8-5: Intake Valve Seals, Valve Spring and Valve Spring Retainer Keys Installation Note

NOTE: Carry out the steps for each cylinder requiring service.





1. Using the special tools, install the new intake valve stem seals. Repeat this step to install all necessary intake valve stem seals.





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





3. Position the intake valve spring and the spring retainer over the intake valve stem and valve seal.





4. Using the special tool, compress the intake valve spring. Install the intake valve spring retainer keys.
5. Remove the compressed air hose from the cylinder.

Items 4-1: Exhaust Valve Seals, Valve Springs and Valve Spring Retainer Keys Installation Note

NOTE: Carry out the steps for each cylinder requiring service.





1. Using the special tools, install the new exhaust valve stem seals. Repeat this step to install all necessary exhaust valve stem seals.





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





3. Position the exhaust valve spring and the spring retainer over the exhaust valve stem and valve seal.





4. Using the special tool, compress the exhaust valve spring. Install the exhaust valve spring retainer keys.
5. Remove the compressed air hose from the cylinder.