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2009 Kia Rio4 dr Sedan LX Manual Transmisson
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15 Posts
Thanks, I'd appreciate any ideas you might have. The noise isn't just annoying, but could be a sign that something is wrong that could cause more serious problems down the line.

Also, although I doubt it's related, the car also sometimes idles somewhat roughly. What happens is that I'm stopped at a light, foot on brake, and every now and then engine power dips down for a split second, then goes back to normal, then again. I recently replaced the plugs, PCV, purge valve and air filter (also cleaned the filter box), did an oil and filter change, and cleaned the throttle and idle control valve.

I also put some Techron in the fuel. There don't appear to be any air leaks. I'm guessing that it's either the fuel injectors or fuel pump or filter, and unrelated to the howling/rattling noise, but I mentioned it here in case it might be related. There are no other major problems with the car, just the usual minor or secondary jobs that need to be done (dead radio, body dings, chipped paint, needs new bushings and shocks, etc.)

Also, in response to your other comment, I'll try this, but the car doesn't have a timing chain, rather a belt. There is a chain, but it connects the input and output valves, I believe. And I replaced the belt recently. I wonder if the tensioner tension was a bit too tight. But my gut feeling is that it's a water pump on its last legs, and the bearing's wearing out and making whining/howling/rattling noises.

+1 on the water pump and sorry about the incorrect timing chain diag. I forget all the time these are simpler engine with belts. I prefer that anyways. I would just check to pin point the noise. It's going to be a tough one. I'm having an even more perplexing problem on my rio 09. So at least you hear a noise my car just misfires on me but without actually running rough. One other last thing to check is honestly make sure you have no vacuum leaks. Since you do have the stumbling idle as it was recommended to me in my post check your Fuel Trims. If you notice a rise in the fuel trims it usually indicates a vacuum leak. That leak could easily explain the rough idle stumbling as well as the noise you are hearing. Not a bad thing to look into.
 

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09 kia spectra ex,04 Neon,04 Chry. T&C, 08 Pontiac G6 gt
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2,454 Posts
I asked a perfectly legit question, with great detail and very politely, and other than a new member who tried their best to help, which is LITERALLY this site's only reason for existence, no one bothered to even TRY to help. All I got was condescension about don't bother us with your stupid and boring questions about your ancient 10 year old car you should have junked long ago, and I responded to in the only way it deserved to be answered. When I come upon questions I think I might be able to help with, I try my best to do so. And you're complaining about MY attitude? Dude, get a mirror, and find something better to do in your retirement than wasting peoples' time.
Yes you asked a "legit" question and said what you had done. BUT did not post of the obvious of going back and rechecking work done. This is the FIRST thing anyone will tell you when a noise such as you describe happens. YES it could be overtightened accessory drive belts or even an overtightened timing belt tensioner adjustment, which by the way can cause additional side force wear to a very old water pump. Thus accelerating it's demise.
We can't see or hear your car, to give further specific fixes...which many of us long timers here keep quiet to some threads due to not knowing how best to respond without a thread going nasty.Many members are here to post problems, yet just want to understand WHY it happened and then go off to their dealer for "servicing" anyway.
Good luck to you and let us know what the "pro's" find, should you elect to not do further DIY and let them "look it over".
 

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Kia Rio 2010 1.4
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6 Posts
Did you manage to sort it out in the end? Since I had the belts replaced my car is much quieter now.
 
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