See also:

Valve clearance
Inspect excessive valve noise and/or engine vibration and adjust if necessary. An authorized HYUNDAI dealer should perform the operation. ...

Maintenance Precautions
Improper or incomplete service may result in problems. This section gives instructions only for the maintenance items that are easy to perform. Several procedures should be done by an authorized Hy ...

To Check the Oil Level
Before checking the oil, warm up the engine to the normal operating temperature and be sure it is parked on level ground. Turn the engine off. Wait five minutes, then remove the dipstick, wipe it ...