Chevrolet Spark manuals

Mazda CX-5 Service & Repair Manual: Hydraulic Lash Adjuster, Rocker Arm

Purpose, Function

HLA

Rocker arm

Construction

HLA

Rocker arm

Operation

Before valve opening

1. The plunger presses up the rocker arm by the spring force of the plunger spring to maintain the valve clearance at 0 mm.


During valve opening

1. If the cam presses down the rocker arm, load is applied to the plunger and valve.

2. If load is applied to the plunger, the hydraulic pressure in the high pressure chamber (A chamber) increases and the check ball closes the hydraulic passage.

3. If the hydraulic passage is closed, the plunger is fixed becoming the rocker arm pivot point because the volume of the engine oil in the high pressure chamber is not changed.

4. The rocker arm presses down the valve.


After valve opening

1. If load is not applied to the plunger, the plunger spring presses up the plunger (maintains valve clearance at 0 mm).

2. Because the capacity of the high pressure chamber (A chamber) increases in Step 1, the check ball is opened and engine oil flows from the reserve chamber (B chamber) to the high pressure chamber (A chamber) to prepare for the next step.

3. The oil in the reserve chamber (B chamber) which is decreased by supplying it to the high pressure chamber (A chamber), is supplied from the oil passage of the cylinder head.


Hydraulic Lash Adjuster (Hla) Removal/Installation
WARNING: A hot engine can cause severe burns. Turn off the engine and wait until it is cool before servicing. CAUTION: If the camshaft is rotated with the timing chain removed ...

Valve, Valve Spring, Valve Seal, Valve Guide
Purpose, Function Valve The intake valve is pressed down by the cam, the intake air passage is opened, and air is introduced into the cylinder. The exhaust valve is pressed down by ...

Other materials:

Rear Combination Light
Purpose The rear combination lights are used to signal the following conditions to vehicles/people at the rear. Rear turn lights: Signals a left or right turn of the vehicle. Brake lights: Signals a vehicle stop. Taillights: Signals the presence of the ve ...

Synchronizer Mechanism [C66 M R]
Purpose, Function For smooth gear changes, the synchronizer mechanism synchronizes the rotation of the engaging area and engages gears. Construction Detent ball-type synchronizer key A detent ball-type synchronizer key has been adopted for the synchronizer mechanism ex ...

Headlight Leveling Actuator
Purpose, Function The headlight leveling actuator drives the motor based on the target optical axis voltage, which is input from the AFS control module, to change the optical axis of the headlights. Construction Built into the front combination lights. Consists of ...

© 2016-2021 Copyright www.mcx5.org