A loud knocking noise from a Kia Sedona engine that diminishes at higher revs could be caused by several factors, including loose or worn engine components, such as a failing timing chain or belt, or issues with the oil supply, like low oil levels or dirty oil affecting lubrication. It may also be related to fuel knocking or detonation due to improper fuel octane. If the noise persists or worsens, it's essential to have a mechanic inspect the vehicle to prevent potential engine damage.
The 2010 Kia Sedona has a V6 engine.
The 2006 Kia Sedona has a V6 engine.
The 2012 Kia Sedona has a V6 engine.
The 2005 Kia Sedona has a V6 engine.
The 2008 Kia Sedona has a V6 engine.
The 2002 Kia Sedona has a V6 engine.
The 2009 Kia Sedona has a V6 engine.
The 2011 Kia Sedona has a V6 engine.
The 2003 Kia Sedona has a V6 engine.
The 2004 Kia Sedona has a V6 engine.
The 2014 Kia Sedona has a V6 engine.