Timing Chain Cover

The timing chain cover has an integrated construction consisting of the cooling system (water pump and water passage) and the lubrication system (oil pump and oil passage). Thus, the number of parts has been reduced to reduce weight.

Timing Chain Cover

Timing Chain Cover

Water Pump Gasket

Timing Chain Cover

Timing Chain Cover

Water Pump Gasket

Oil Pump Rotor

Water Pump

View from Front Side 5. Hydraulic Lash Adjuster

Oil Pump Chamber

View from Back Side

285EG21

Oil Pump Rotor

Water Pump

View from Front Side 5. Hydraulic Lash Adjuster

Oil Pump Chamber

View from Back Side

► The hydraulic lash adjuster, which is located at the fulcrum of the roller rocker arm, consists primarily of a plunger, plunger spring, check ball, and check ball spring.

► The engine oil that is supplied by the cylinder head and the built-in spring actuate the hydraulic lash adjuster. The oil pressure and the spring force that act on the plunger push the roller rocker arm against the cam, in order to adjust the valve clearance that is created during the opening and closing of the valve. As a result, engine noise is reduced.

Hydraulic Lash Adjuster

Passage

Check Ball

Check Ball Spring Plunger Spring

Hydraulic Lash Adjuster

Passage

Roller Rocker Arm

Service Tip-

Valve clearance adjustment is not necessary because a hydraulic lash adjuster is used in this model.

285EG21

285EG22

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