One problem related to timing tensioner has been reported for the 2012 Kia Motor Sedona. The most recently reported issues are listed below. Please also check out the statistics and reliability analysis of the 2012 Kia Motor Sedona based on all problems reported for the 2012 Sedona.
The timing chain tensioners bleed down pressure after the vehicle has set for a few hours causing chain slap at start up which over time will damage internal engine components up to and including timing issues that could cause engine failure. While there is a TSB from kia on this known issue kia claims it is normal to hear the chain slap against the engine walls until the tensioners build pressure over several seconds.