DISASSEMBLY
- Place cylinder head on ST.
- ST 18250AA000 CYLINDER HEAD TABLE
- Remove valve shims and valve lifters.
- Set ST on valve spring retainer. Compress valve spring and remove the valve spring retainer key. Remove each valve and valve spring.
ST 499718000 VALVE SPRING REMOVER
| CAUTION | For correct re-installation, keep removed parts in order in their original positions. Mark each valve to prevent confusion. Use extreme care not to damage the lips of the intake valve oil seals and exhaust valve stem seals. |
Scheme 449
Scheme 450
Scheme 451
- Installation of valve spring and valve Place cylinder head on ST. ST 18250AA000 CYLINDER HEAD TABLE Coat stem of each valve with engine oil and insert valve into valve guide. CAUTION: When inserting valve into valve guide, use special care not to damage the stem seal lip. Install valve spring and retainer. CAUTION: Be sure to install the valve springs with their close-coiled end facing the seat on the cylinder head. Install valve spring with the painted surface facing the retainer side. Seat Valve spring Retainer Painted face Set ST on valve spring. ST 499718000 VALVE SPRING REMOVER Compress valve spring and fit valve spring retainer key. After installing, tap valve spring retainers lightly with wooden hammer for better seating.
- Apply oil to the surface of the valve lifter and valve shim.
- Install valve lifter and valve shim.
Scheme 452
Scheme 453
- Check valve springs for damage, free length, and tension. Replace valve spring if it is not to the specifications presented below.
- To measure the squareness of the valve spring, stand the spring on a surface plate and measure its deflection at the top using a try square.