Join Date: Nov 2014
Drives: 2006 Kia Sedona EX 3.8 V6
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06 Kia Sedona Louder Noise
Lately my wife's 06 Kia Sedona has been sounding "louder" than normal. On startup/idle it sounds fine, but seems to run louder when going down the road. Idling or revving while in park sounds fine but when driving down the road or accelerating from a stop it is noticeable outside the vehicle. Also, when accelerating slowly I don't hear anything but when doing a moderate or hard acceleration I hear a sound, for lack of a better term, that sounds like "air sucking" even from inside the vehicle (Not sure that is the best explanation for how it sounds, might try to get a recording of it). So it seems like the issue is only occurring when there is a true load. Also doesn't seem to be dependent on gears or RPMs as it starts on acceleration, any gear, and goes away before a gear shifts.
Anyways I started poking around and found a leaking front valve cover and thanks to the forums here was able to replace it and all spark plugs without issue. Thankfully it didn't destroy the alternator but it sure was covered.
My next plan of action is to check through the exhaust but wanted to try and get some feedback on other ideas.
- I did find a hole in the breather nipple located near the left spark plug and plan on replacing that but don't think that would be enough to cause what I am hearing.
- Air Intake Hose has been replaced previously.