Admin1
11-08-2010, 01:05 AM
DESCRIPTION:
Some drivers of the 2011 model year Sonata equipped with the 2.0L Turbocharger GDI
engine may notice a slight engine rattle or buzzing sound during certain operating
conditions. The sound may sound similar to a loose exhaust heat shield.
This sound may be noticed:
• When the engine is started after a long cool down period with coolant temperature
less than 86oF (30oC). Initial start up rattle/buzzing may last for 25 seconds.
• During acceleration with engine speed between 1,500 ~ 2,500 RPM.
APPLICABLE VEHICLES:
• 2011 model year (YF) Sonata 2.0L Turbo
ADDITIONAL INFORMATION:
During normal engine operation, natural engine vibrations are transmitted to the
turbocharger waste gate actuator rod, the pivot point, and the waste gate valve. The
rattle or buzzing sound that may occur results from the required tolerances in the waste
gate pivot point and the waste gate valve. These tolerances are necessary to allow
operation under the extreme operating temperatures experienced by the turbocharger.
SERVICE ACTION:
No repair should be attempted for this rattling or buzzing condition. This normal
operating characteristic will not affect the performance or durability of the vehicle.
To view the bulletin Click Here. (http://www.myhyundaiforums.com/10-EM-005.pdf)
Some drivers of the 2011 model year Sonata equipped with the 2.0L Turbocharger GDI
engine may notice a slight engine rattle or buzzing sound during certain operating
conditions. The sound may sound similar to a loose exhaust heat shield.
This sound may be noticed:
• When the engine is started after a long cool down period with coolant temperature
less than 86oF (30oC). Initial start up rattle/buzzing may last for 25 seconds.
• During acceleration with engine speed between 1,500 ~ 2,500 RPM.
APPLICABLE VEHICLES:
• 2011 model year (YF) Sonata 2.0L Turbo
ADDITIONAL INFORMATION:
During normal engine operation, natural engine vibrations are transmitted to the
turbocharger waste gate actuator rod, the pivot point, and the waste gate valve. The
rattle or buzzing sound that may occur results from the required tolerances in the waste
gate pivot point and the waste gate valve. These tolerances are necessary to allow
operation under the extreme operating temperatures experienced by the turbocharger.
SERVICE ACTION:
No repair should be attempted for this rattling or buzzing condition. This normal
operating characteristic will not affect the performance or durability of the vehicle.
To view the bulletin Click Here. (http://www.myhyundaiforums.com/10-EM-005.pdf)