Hydraulic Lash Adjuster (HLA)

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

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 2000-3000 RPM. If it doesn't disappear, refer to step 7 below.
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 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		NOTE: Do not run engine at a speed higher than 3000 RPM, as this may damage the HLA.
6. Continuous noise during idle after high engine speed	Engine oil level too high or too low	Check the level of oil to refill or drain the oil.
	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.
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 press HLA down by hand. If it moves, replace the HLA. CAUTION: Beware of hot HLA.