Valve Spring: Service and Repair

Valve Stem Oil Seal and Valve Spring Replacement

Special Tools
* EN-36017 - Valve Guide Seal Remover
* EN-43649 - Valve Spring Compressor
* EN-43649-10 - Valve Spring Compressor Adaptor Set
* EN-43653 - Flywheel Holding Tool

For equivalent regional tools refer to Special Tools (Tools and Equipment).

Removal Procedure

Note: Prevent the crankshaft from rotating clockwise or counterclockwise before using compressed air in the cylinder. Rotation of the crankshaft may cause damage to EN-43653 - holding tool.

1. If equipped, with a manual transmission leave the transmission in first gear with the vehicle on the ground and the parking brake set.
2. If equipped, with an automatic transmission, remove the starter. Refer to Starter Replacement (Service and Repair).
3. Install EN-43653 - holding tool.
4. Remove the camshaft. Refer to Intake Camshaft and Valve Lifter Replacement (Intake Camshaft and Valve Lifter Replacement) or Exhaust Camshaft and Valve Lifter Replacement (Exhaust Camshaft and Valve Lifter Replacement).




5. Remove the camshaft roller followers (1).




6. Install the EN-43649-10 - adaptor set (1) to the front and rear of the cylinder head.
7. Install the cross bars and locks (2) of the EN-43649 - compressor to the valve spring compressor adaptors.
8. Remove the spark plugs. Refer to Spark Plug Replacement (Service and Repair).
9. Install an air hose adapter into the spark plug hole.
10. Attach an air hose to the adapter and pressurize the cylinder to 690 kPa (100 psi).
11. Compress the valve spring using the valve spring compressor (3).




12. Remove the valve spring keepers (1).
13. Remove the valve spring (3) and retainer (2).




14. Use the EN-36017 - seal remover (1) to remove the valve seal.

Installation Procedure




1. Using the EN-36017 - seal remover (1) install the NEW valve seal. Fully seat the seal onto the valve guide.




2. Install the valve spring (3) and retainer (2).
3. Compress the valve spring using the valve spring compressor.
4. Install the valve spring keepers (1).
5. Disconnect the air hose and air hose adapter.




6. Remove the EN-43649 - compressor and EN-43649-10 - adaptor set from the cylinder head.
7. Install the spark plugs. Refer to Spark Plug Replacement (Service and Repair).




8. Install the camshaft roller followers.
9. Install the camshaft. Refer to Intake Camshaft and Valve Lifter Replacement (Intake Camshaft and Valve Lifter Replacement) or Exhaust Camshaft and Valve Lifter Replacement (Exhaust Camshaft and Valve Lifter Replacement).
10. If used, remove the EN-43653 - holding tool.
11. If removed, install the starter. Refer to Starter Replacement (Service and Repair).