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Mazda CX-5 Service & Repair Manual: Hydraulic Lash Adjuster (Hla) Inspection

HLA Troubleshooting


Item

Occurrence

Possible cause

Action

1

After replacing oil, sound occurs when starting engine

Oil shortage in oil passage

  • Maintain the engine speed between 2,000 to 3,000 rpm for approx. 2 s and 10 min*, and verify that the sound disappears.

    • If the sound disappears, the HLA is normal.

    • If the sound does not disappear, go to item 5.

2

Sound occurs at instant when engine is started on vehicle left for 1 day

3

Starter cranked for 3 s or more and sound occurs directly after engine is started

HLA oil shortage

4

Sound occurs directly after engine is started with newly replaced HLA

5

Sound occurs continuously for 10 min or more

Insufficient oil pressure

  • Inspect the oil pressure..

    • If less than the specification, inspect each part of the engine.

HLA malfunction

  • Inspect the HLA..

6

Sound occurs during idling after high-speed driving

Incorrect engine oil level

  • Inspect the engine oil level..

Engine oil deterioration

  • Replace the engine oil..


* Period of time engine oil flows to the HLA, this value includes tolerance caused by the ambient temperature and the oil used.

HLA Inspection

1. Disconnect the negative battery cable..

2. Remove the plug hole plate..

3. Remove the ignition coil/ion sensors..

4. Remove the cylinder head cover..

5. Press the rocker arm from above and verify that the HLA does not drop.


6. Install in the reverse order of removal.

Cylinder Head
Outline With the adoption of the rocker arm (built into needle roller bearing), the sliding resistance has been reduced. With the adoption of the HLA, the valve clearance is maintain ...

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 ...

Other materials:

Drive Belt Inspection [Skyactiv G 2.0]
Generator Drive Belt NOTE: The generator drive belt deflection/tension inspection is not necessary with the adoption of the drive belt auto tensioner. 1. Verify that the indicator part of the cast hexagon on the drive belt auto tensioner is within the normal range. If ...

Check Valve Inspection
Except U.S.A. And CANADA 1. Remove the check valve.. 2. Verify that there is no airflow when positive pressure is applied to port A. If there is airflow, replace the check valve.. 3. Verify that there is no airflow when negative pressure is applied to port A. If ther ...

Lumber Support Motor Inspection
WARNING: Handling a side air bag improperly can accidentally operate (deploy) the air bag, which may seriously injure you. Read the service warnings/cautions in the Workshop Manual before handling the front seat (side air bag integrated).. 1. Disconnect the negative battery cable ...

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