Sentra XE L4-1.8L (QG18DE) (2000)
Valve Guide Seal: Service and Repair
VALVE OIL SEAL
1. Remove rocker cover.
2. Remove camshaft.
3. Remove valve spring.
4. Remove valve oil seal with Tool.
Piston concerned should be set at TDC to prevent valve from falling.
5. Apply new engine oil to new valve oil seal and install it with Tool.