HLA (Hydraulic Lash Adjuster)

WARNING: This page is about a different variant/trim than selected.

* HLA: Hydraulic Lash Adjuster

With the HLA filled with engine oil, hold B and press A by hand. If A moves, replace the HLA.

Courtesy of HYUNDAI MOTOR AMERICA

1. Temporary noise when initial engine starting.	Normal	When the engine is stopped, the oil is leaking from the HLA, so the noise disappears when the oil pressure reaches steady state.
2. Continuous noise when the engine is started after parking more than 48 hours	Oil leakage of the high pressure chamber in the HLA, allowing air to get in.	Noise will disappear within 15 minutes when engine runs at 2000 - 3000 RPM. If the noise doesn't disappear, refer to step 7 below. NOTE: Do not run engine at a speed higher than 3000 RPM, as this may damage the HLA.
3. Continuous noise when the engine is first started right after removal and installation of the cylinder head.	Insufficient amount of oil in cylinder head oil passage.
4. Continuous noise when the engine is started after the excessive cranking of the engine by the starter motor or band	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	Drain or add oil as necessary.
	Deteriorated oil	Change the oil
7. Noise continues for more than 15 minutes	Low oil pressure	Check oil pressure and oil supply system of each part of engine.
7. Noise continues for more than 15 minutes	Faulty HLA	Remove the cylinder head cover, and then inspect the HLA. If sponge symptom is detected, replace the HLA. CAUTION: Be aware of hot HLA.

* Sponge: It is a symptom that HLA can be pressed even by the back of the hand as air flows into the high pressure chamber in the HLA.