Toyota
Jeep Cherokee
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Engine » 2.5L engine » Description and operation
Rocker ARM

DESCRIPTION

The rocker arms are made of stamped steel and have a operational ratio of 1.6:1.

Fig. 8 Rocker Arms-Typical
Fig. 8 Rocker Arms-Typical

1 - CAPSCREWS
2 - BRIDGE
3 - PIVOT ASSEMBLY
4 - PUSH RODS
5 - ROCKER ARMS

OPERATION

When the push rods are forced upward by the camshaft lobes the push rod presses upward on the rocker arms, the rocker arms pivot, forcing downward pressure on the valves forcing the valves to move downward and off from their seats.

Valves

DESCRIPTION

The valves are made of heat resistant steel and have chrome plated stems to prevent scuffing. All valves use three bead lock keepers to retain the valve spring and promote valve rotation (Fig. 9).

    More about «Description and operation»:

    Engine

    Lubrication system

    Cylinder block

    Cylinder head

    Crankshaft

    Piston and connecting rod

    Camshaft

    Rocker ARM

    Valve spring

    Valve guide

    Oil pan

    Intake manifold

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