Valve springs and seals. Hydraulic lash adjuster

Valve springs and seals

REMOVAL

(1) Remove the cylinder head cover. Refer to Cylinder Head Cover in this Section.

(2) Using Special Tool 8516 Valve Spring Compressor, remove the rocker arms and the hydraulic lash adjusters (Fig. 67).

Fig. 67 Rocker Arm-Removal

1 - CAMSHAFT

2 - SPECIAL TOOL 8516

(3) Remove the spark plug for the cylinder the valve spring and seal are to be removed from.

(4) Apply shop air to the cylinder to hold the valves in place when the spring is removed (5) Remove the camshaft. Refer to Camshaft in this section.

NOTE: All eight valve springs and seals are removed in the same manner; this procedure only covers one valve seal and valve spring.

(6) Using Special Tool 8387 Valve Spring Compressor, compress the valve spring.

NOTE: It may be necessary to tap the top of the valve spring to loosen the spring retainers locks enough to be removed.

(7) Remove the two spring retainer lock halves.

NOTE: the valve spring is under tension use care when releasing the valve spring compressor.

(8) Remove the valve spring compressor.

(9) Remove the spring retainer, and the spring.

(10) Remove the valve stem seal.

NOTE: The valve stem seals are common between intake and exhaust.

INSTALLATION

(1) coat the valve stem with clean engine oil and install the valve stem seal. make sure the seal is fully seated and that the garter spring at the top of the seal is intact.

(2) Install the spring and the spring retainer.

(3) Using Special Tool 8387 Valve Spring Compressor, compress the spring and install the two valve spring retainer halves.

(4) Release the valve spring compressor and make sure the two spring retainer halves and the spring retainer are fully seated.

(5) Install the camshaft. Refer to Camshaft in this section.

(6) Position the hydraulic lash adjusters and rocker arms (Fig. 67).

(7) Install the cylinder head cover.

Hydraulic lash adjuster

REMOVAL

(1) Remove cylinder head cover(s). Refer to procedure in this section.

(2) Remove rocker arm(s). Refer to procedure in this section.

CAUTION: If lash adjusters and rocker arms are to be reused, always mark position for reassembly in their original positions.

(3) Remove lash adjuster(s).

Fig. 68 Valve Assembly Configuration

1 - VALVE LOCKS (3-BEAD)

2 - RETAINER

3 - VALVE STEM OIL SEAL

4 - INTAKE VALVE

5 - EXHAUST VALVE

6 - VALVE SPRING

INSTALLATION

(1) Install hydraulic lash adjuster making sure adjusters are at least partially full of oil. This can be verified by little or no plunger travel when lash adjuster is depressed.

(2) Install rocker arm(s). Refer to procedure in this section.

(3) Install cylinder head cover(s). Refer to procedure in this section.