HLA (Hydraulic Lash Adjuster)
With the HLA filled with engine oil, hold A and press B by hand. If B moves, replace the HLA.
TROUBLESHOOTING
| No. | Problem | Possible cause | Action |
|---|---|---|---|
| 1 | Temporary noise when starting a cold engine | Normal | This noise will disappear after the oil in the engine reaches the normal pressure. |
| 2 | Continuous noise when the engine is started after parking more than 48 hours. | Oil leakage of the high pressure chamber on the HLA, allowing air to get in. | Noise will disappear within 15 minutes when engine runs at 2,000-3,000 RPM. If it doesn't disappear, refer to step 7 below .
CAUTION:
Do not run engine at a speed higher than 3,000 RPM, as this may damage the HLA.
|
| 3 | Continuous noise when the engine is first started after rebuilding cylinder head. | Insufficient oil in cylinder head oil gallery. | |
| 4 | Continuous noise when the engine is started after excessively cranking the engine by the starter motor. | Oil leakage of the high-pressure chamber in the HLA, allowing air to get in. Insufficient oil in the HLA. | |
| 5 | Continuous noise when the engine is running after changing the HLA. | ||
| 6 | Continuous noise during idle after high engine speed. | Engine oil level too high or too low. | Check oil level. Drain or add oil as necessary. |
| Excessive amount of air in the oil at high engine speed. | Check oil supply system | ||
| Deteriorated oil. | Check oil quality. If deteriorated, replace with specified type. |
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| 7 | Noise continues for more than 15 minutes. | Low oil pressure | Check oil pressure and oil supply system of each part of engine. |
| Faulty HLA. | Remove the cylinder head cover and press HLA down by hand. If it moves, replace the HLA.
WARNING:
Be careful with the hot HLAs.
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