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: 85,817 mi (16,000 mi - 173,845 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, 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, 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, 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, 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, 2006 Kia Sedona, 111,374 mi
noise coming from pulley tensionner
Our timing chain broke at JUST under 50,000km, 2 years old. Initially, the engine was making a strange noise on startup that would go away and sometimes return on acceleration. No warning lights came on. Within a week, the timing chain broke and the motor blew apart. We have been waiting for a week now to hear from KIA whether they are going to honor the warranty. I'm pretty choked that a 2-year-old motor could blow apart like that - let alone that a timing chain can blow apart like that - let alone the fact that NO warning lights came on - AND, a military mechanic who stopped to try to help us with his service vehicle tried to use the code reader on the van, and NOTHING came up. Now they are suggesting that a short lag in an oil change from a YEAR ago may void the warranty. REALLY, KIA? Hope you come through on that warranty...
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.
Visitor, 2006 Kia Sedona
My 2006 Kia Sedona makes a horrible noise only on start up, have had it to kia many times and was told this was called a rough start, also had my kia in the shop in december 2013 cause the oil light was on, when kia called me they said good news is that is not the oil pump but my engine needed to be flused $200.00 later on the way home the engine light came back on. I took my car to another shop they removed the oil pan and said the oil pump was bad and that kia never removed the pan cause the original seal was still on it.
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.