If the engine is excessively noisy on startup (after the engine has been off for several hours) and the noise lasts more than four or five seconds, turn off the engine and check for correct engine oil level. If the oil level is correct, the noise may be caused by the timing chain tensioner. Kia released an updated timing chain tensioner to solve this problem.Google+
Car Problem Reports
Kia Sedona Updated Timing Chain Tensioner to Correct Noise on Startup
Kia Sedona Problem
Engines Affected: 3.5L V6, 3.8L V6
Average Mileage: 75,162 mi (16,000 mi - 142,000 mi)
Visitor, 2009 Kia Sedona, 3.8L V6, 65,605 mi
I think Kia should be required to fix this problem regardless of warranty coverage. It is a problem they have admitted to by releasing a new tensioner to fix it
Visitor, 2005 Kia Sedona, 3.5L V6, 60,000 mi
Excessive noise on startup when cold then goes away after the car is warmed up. Noise is increased when put in drive or when heater fan is running.
Visitor, 2005 Kia Sedona, 3.5L V6, 62,000 mi
Had the fan belt replaced some months ago. When starting the engine all is OK. but when I put the auto in drive or reverse there is a rumbling noise until I accelerate slightly. After driving a short distance or a warm up of five minutes or so, the noise is gone. I suspect the belt material itself is making the noise until it is sufficiently warmed up and more pliable. Is this a reasonable diagnosis? Or is there a known cause?
Visitor, 2006 Kia Sedona, 111,374 mi
noise coming from pulley tensionner
Visitor, 2006 Kia Sedona, 93,000 mi
knocking on start up that lasts only a few seconds and is louder the colder the engine is..if turned off and back on engine does not make the noise only after its been off for a little while..
Visitor, 2006 Kia Sedona, 3.5L V6, 61,000 mi
Dealership said 14.0 hours of labor and $1240.00 to fix, which will avoid wearing ou the guides.
Visitor, 2008 Kia Sedona, 99,000 mi
Rattling noise upon cold start which lasted until engine warmed up. Took to KIA. They finally decided to replace timing chain tensioner.
Visitor, 2002 Kia Sedona, 3.5L V6
loud whistling sound from left side by tensioner during startup and rainy days due to the humidity. beginning to last longer.
we were unaware of the tensioner problem untill now i own a 08 sedona (still paying on ) and our tensioner failed which caused our timing chain to become loose and break things which all the peices then went all over my engine and a clog so we ended up with low oil presure which none of our gages or lights notifed us of .. we are at a loss we bought the sedona used from a non kia dealership and were unaware of the 60000 mile timing chain we always did our oil changes ourselfs and any other upkeep .. currently trying to get it fixed
Visitor, 2005 Kia Sedona, 3.5L V6
Same as all the others reported.