Toyota
Dodge Durango
 Service Manual
Engine » Removal and installation
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 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.

    More about «Removal and installation»:

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    Engine mount-rear

    Structural cover

    Engine assembly

    Intake manifold

    Exhaust manifolds

    Cylinder head cover

    Rocker arms

    Cylinder heads

    Valve springs and seals

    Hydraulic lash adjuster

    Crankshaft damper

    Timing chain cover

    Timing chain and sprockets

    Idler shaft-timing drive

    Camshafts-in vehicle

    Crankshaft main bearings

    Oil pan 4x2 vehicle

    Oil pan 4x4 vehicle

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    Crankshaft

    Flexplate

    Oil pump

    Engine oil pressure sending unit

    Crankshaft oil seal-front

    Crankshaft oil seal-rear

    Engine core plugs

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