Valve clearance
Hyundai Sonata / Sonata 2011 Owners Manual / Maintenance / Explanation of scheduled maintenance items / Valve clearance
Inspect excessive valve noise and/or engine vibration and adjust if necessary. An authorized HYUNDAI dealer should perform the operation.
See also:
Engine Coolant Temperature Warning Light
WARNING:
Never remove the radiator cap when the engine is hot. The engine coolant is
under pressure and could erupt and cause severe burns. Wait until the engine is
cool before removing the rad ...
Adjusting the height up and down
To raise the headrest, pull it up to the desired position (1). To lower the headrest,
push and hold the release button (2) on the headrest support and lower the headrest
to the desired position ...
Coolant
The coolant should be changed at the intervals specified in the maintenance schedule. ...