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:

Roof Molding Removal
1. Insert a tape-wrapped flathead screwdriver in the position shown in the figure. 2. Rotate a tape-wrapped flathead screwdriver in the direction of the arrow in the order of (1), (2) shown in the figure and remove the roof molding from the front T-stud. 3. Rotate the roof molding in th ...

Magnet Clutch [Manual Air Conditioner]
Purpose The magnetic clutch transmits the rotation force from the engine to the shaft in the A/C compressor. Function The magnetic clutch engages or disengages the magnetic clutch and the A/C turns on or off by switching the power transmission from the engine. Con ...

Side Air Bag Module [Standard Deployment Control System]
Purpose When a side air bag module receives an impact from a lateral collision, the operation (deployment) of the air bag mediates the impact to the chest, stomach, and waist of the driver and front passenger. Function When a side air bag module receives an impact from a la ...

© 2016-2021 Copyright www.mcx5.org