ENGINE - Base Engine ROCKER ARM (1) The cam follower of the rocker arm is a roller with nea,.,bearings.
,I$ I - ‘Roller v Needle- bearing
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(2) A jet of oil spurts onto the contact area between the cam and roller from an oil jet located on the fulcrum side of the rocker arm. (3) Since the roller rotates as the cam rotates, friction loss is drastically reduced as compared with the conventional slipper type.
6EN025-4
2-valve SOHC slipper type
O-valve DOHC roller type
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2.500 Engine speed rpm
1 5.000
(4) Due to the construction of the roller rocker arm, the valve train driving torque is reduced to about half that of the conventional slipper type, which is equivalent to, or compares favorably with, the 2-valve SOHC slipper type. All these factors contribute to enhanced engine performa and fuel economy. , LASH ADJUSTER The hydraulic lash adjuster is of the end pivot type. It eliminates the need for adjustment of the valve clearance. There are four lash adjusters provided for each cylinder, 16 in all.
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Camshaft IRocker an
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Ir Oil passage ,E
Lash adjuster Reservoir chamber Cylinder head
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Valve ‘-
6E NO255
6EN0256