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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:

Front Door Key Cylinder Switch Inspection
1. Perform the front door glass preparation.. 2. Disconnect the negative battery cable.. 3. Remove the following parts: a. Inner garnish. b. Front door trim. c. Front door key cylinder. d. Front door glass. e. Front door module panel. f. Front door latch and lock actuator. Front Do ...

Cruise Control Switch Inspection
1. Disconnect the negative battery cable and wait for 1 min or more.. 2. Remove the driver?side air bag module.. 3. Disconnect the clock spring connector (part wiring harness-side). 4. Measure the resistance between clock spring terminals E and A (part wiring harness-side) using a tester. ...

Sunroof Switch Inspection
1. Disconnect the negative battery cable.. 2. Remove the front map light.. 3. Verify that the continuity between the sunroof switch terminals is as indicated in the table. If not as indicated in the table, replace the sunroof switch. ...

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