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:
Air intake control
This is used to select outside (fresh) air position or recirculated air position.
To change the air intake control position, push the control button.
Recirculated air position
...
Trailer towing
We do not recommend using this vehicle for trailer towing. ...
If the engine overheats
If your temperature gauge indicates overheating,
you experience a loss of power, or hear loud
pinging or knocking, the engine is probably too
hot. If this happens, you should:
1. Pull off the road ...


