Elantra GLS Sedan L4-2.0L (1999)
4. Using special tool, Valve Spring Compressor (09221-29100), compress the spring. Be careful that the valve stem seal is not distorted by the
bottom of the retainer. Then install the retainer locks. After installation of the valves, make certain that the retainer locks are properly installed.
5. Install the cylinder head. Refer to Cylinder Head Assembly; Service and Repair; Cylinder Head Assembly.