Valve Spring: Service and Repair

VALVE SPRING, VALVE SPRING RETAINER AND VALVE STEM SEAL
1. Remove the spark plugs.
2. Remove the valve tappets.

Warning:
^ Always wear protective goggles when working with compressed air. This can prevent injury. Failure to follow these instructions can result in personal injury.

Caution:
^ Use compressed air at 7 to 10 bars (1101 - 145 psi). Do not disconnect the compressed air from the cylinder until the valve spring, valve spring retainer and valve collet is installed.

3. Unscrew the spark plug on cylinder No. 1 and connect the compressed air supply.

Note:
^ Place all parts in order to one side.





4. Apply compressed air to the cylinder and remove the valve spring.
^ Using the special tools, compress the valve spring and remove the valve collet, using some grease and a small screwdriver.
^ Remove the valve spring retainer and the valve spring.
^ Using the special tools, compress the valve spring and remove the valve collet, using some grease and a small screwdriver.
^ Remove the valve spring retainer and the valve spring.





5. Using the special tools, remove and discard the valve seal.





6. Install the valve stem seal installation sleeve.





7. Using the special tool, install the valve seal.

Note:
^ Check the seating of the valve collet.





8. Using the special tools, install the valve spring. Insert the valve spring and the valve spring retainer. Compress the valve spring and install the valve collet using some grease and a small screwdriver.

Note:
^ Do not tighten the spark plug at this time.

9. Disconnect the compressed air supply and install the spark plug.
10. Repeat the appropriate removal and installation steps for all of the other cylinders.





11. Tighten the spark: plugs.
12. To install reverse the removal procedure.
^ Coat the valve tappets with clean engine oil.