2007-2011 Camry - Common Problems Excessive Oil Consumption (aka 'Burning Oil'): This issue is a result of poorly designed piston rings. Oil can leak past these piston rings at sometimes high rates, and that can lead to engine failure if oil levels aren't monitored closely. Description: TOYOTA: ON CERTAIN VEHICLES, A KNOCK OR RATTLE NOISE, COMING FROM ENGINE COMPARTMENT, IS HEARD DURING A COLD SOAK STARTUP, AND THE CONDITION LASTS APPROXIMATELY ONE SECOND. MODEL YEARS 2009-2012 CAMRY, HIGHLANDER, SIENNA, VENZA, RAV4." Does this seem to describe your problem? There are.