Sonata I45 (YF - 2011+) :: Hesitation And Valve Rattle When Going About 60 Mph
Dec 6, 2016
I just purchased my 2012 Sonata GLS about 2 weeks ago and had 64,000 miles on it. Put a few hundred miles on it around town without issue and then head out on a road trip and put about 750 miles on it when I had the issue. I was going about 60 mph and went to pass a semi and when I stepped on it the car started lurching, crazy valve rattle, and seemed to lose a lot of power. Got back behind the semi and babied it until I found a place to pull over and check it out. It was 2 quarts low on oil so I topped it off and it sounded fine, running smooth and no ticking or anything. Drove it around a bit and everything seemed fine and eventually got back on the highway and running fine. Pulled over after 100 miles and another 1/2 quart low, topped off.
Another 100 miles and another 1/2 quart, but running great with no issues. 150 miles from home and it happens again when I try to pass with the rattling valves and loss of power and I have to limp it to a gas station and now hearing the valve rattle and chugging on just a slight incline and going 20 mph. Get it towed 150 miles back to the Honda dealer where i purchased it from (long story) and their tech drove it and said he thought it needed a new motor since he barely made it back to the shop. They send it over to my local Hyundai dealer, and all of the sudden it is running great again! I go and drive with the tech and hammering on the throttle and it's running like a champ. I left it for him to drive home and they put 98 miles on it without issue. I picked it up yesterday and they said to bring it back if it happens again, but totally stumped as what it could be. They did start the oil consumption test so I will update when that is done.
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I have a 2014 Sonata with 22k miles. I love this car but lately I've noticed valve rattle under acceleration. Brought this up with service tech and he said I'm not driving the car on long enough trips to keep it cleaned off. When I researched the GDI very little info comes up for Hyundai mainly vw and BMW. I guess what I'm asking is is the only fix for the carbon build up removing the intake and cleaning the valves manually or is there another way.
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Every time I start my 2013 Azera there is a rattling of the valves like there is no oil in the top end. I have heard other owners complaining about this so I asked my dealer when I went in for an oil change. The last three changes I have asked and he told me the same thing, there is nothing being reported. So I got my oil changed and went home. Parked the car for 6.5 ~ 7 hours and when I started it up the sound was louder than ever. I called the dealer back and told them. They asked me to leave it overnight so they could hear the noise for them selves. I dropped the car off that evening.
I got a call the first thing in the morning and they said that their tech did hear something and they were going to test it again in two hours and call me back. They called back and said they believed it was the CAM phasers. They gave me the car back while they ordered parts and rounded up a loaner. I dropped it off on Thursday.
Two weeks later (today) I picked the car up. Here is what they did. It turned out to be the CAM Phasers so when they got in there they also had to replace the CAM shafts (All 4) as well. I am sure there was more going on than what they told me, after all they had the car for two full weeks!
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I have a 2011 GLS with about 47K.
There seems to be an issue with acceleration around 50-65MPH as the RPMs will jump as if to hesitate between gears (just my assumption). Maybe driving style/conditions as I live in West-Central Florida?
I'm the original owner and we have two of the same vehicles.
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I've removed the splash guard(s) and can see a bunch of different thick hoses. I have no clue what I'm supposed to be looking for in order to drain the coolant. What I'm looking for (picture would be great or a really good description).
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I have a 2011 Sonata GLS with 127k miles on it and I'm trying to diagnose a problem, possibly with transmission.
Since I bought the car at 115k miles I started hearing a noise from engine zone, which appears quite rarely. Noise resembles valve knocking, appears mostly at traffic lights and colder weather (evenings). I was trying to catch the sound by recording it while using emergency brake at D pos. but the sound disappeared right after releasing brake pedal.
Describing in a different way it sounds like a propeller touching something with its blades. The sound also appears at 1900rpm on any gear (mostly when slightly releasing gas pedal around 2k rpm).
While trying to understand/fix the issue I used:
- liqui moly valve cleaner and engine flush
- techtron injection cleaner
- replaced spark plugs
These operations had almost 0 effect on car behavior. The symptoms boil down to a torque converter. Transmission shifts fine, I was going to try transmission fluid change ( a full change by dealer), however it may do more harm, so I'm not sure yet.
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I picked up my 2012 limited Turbo last night but noticed there's a rattle of some sort when I accelerate around 2k rpm, it kind of sounds like a bunch of metals being shaken up. Is this normal? I am also trying to test for the left/right pull, but with all the bad roads here in the city its getting kinda tough.
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2 days ago, and again twice today, I have had an issue when I need to change lanes and speed up, but when I hit the gas pedal (not flooring it, but significant pressure) I have had the car jerk 3 times while the rpm needle goes up to 6. Then the rpm drops to 2, the acceleration finally kicks in, and a huge puff of grey smoke makes the cars behind me completely disappear.
I've read threads about the smoke with the acceleration, but no one mentioned the jerking and not wanting to actually accelerate at first.
There are 33,000 miles on my car.
I called the dealership and they said it only sounds like it's an issue that something in the engine needs to be cleaned out, and they want to charge me $200 if that's the case.
Should something need to be cleaned out at only 33,000 miles? (mind you I also just had the dealership tell me I didn't need my 30,000 mile tune up yet after doing an inspection).
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I hear a rattle or growl from the engine at 2,000 - 2500 rpm. Car performs fine. What it may be?
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So on my new 2.0T Sonata I noticed a brief metallic rattle in the 2K-3K RPM range when you rev the throttle. I was very concerned.
The sales rep said it may be the heat shielding that is coming lose. He was concerned and said to bring it back when Service is open.
I just got back from the dealer: The service manager didn't know what it was but his tech said it was part of the turbo system, it's a 1/4 inch bar (parallel with the bumper) you can plainly see between the firewall and engine. He said what it did but I forgot to take notes.
I listened to another 2.0 Turbo Sonata on the lot and it has the exact same rattle when rev'd.
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I have a 2011 sonata with 72000 Km on it. As I am driving at highway speeds I notice a rattle from the drivers side towards the door. I can't quite locate where but have tried pushing trim and I can't stop it. Took it to the dealer and was told there was nothing wrong and no rattle. On a trip yesterday I noticed the rattle stopped as I braked. So I then applied very light pressure on the brake pedal. So light it did not come off cruise. And the rattle stops. What is the likely cause? I want to be prepared with some ideas when I take it back to the dealer.
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I recently purchase a 2011 Sonata. It sounds like there is a rattle in acceleration coming from the exhaust (passenger rear)
I had the just alignment professionally checked, and it's spot on, but it seems to pull to the left still.
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I drive a '11 Sonata GLS and experience the rattling noise/clanking when weight shifts to the front-right of the car or when i go over a dip, and the noise is coming from the passenger side of the vehicle. I THINK it is the glove box issue that has been mentioned before and I am going to purchase some felt tape and apply this method [URL] .... that was posted here. Did this correct the issue?
And also when i reverse the car (specifically when I turn the wheel to the right) I get a knocking noise, which seems to also be coming from the front-right (or back) I can't tell. Can this be an axle? I'm at 79k mileage so the dealership wants $125 to diagnose the problem and that amount will go towards anything needing repair. Should I take the car to another shop instead?
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When going down the road I notice a rattle noise coming from the steering column area. I took it to the dealer a week or so after noticing it. I purchased the car brand new and like I said I took it to the dealer a week after purchasing it and they said they could not find anything and said they zip tied the brake lines or some bs hoping that would solve my problem.
It is now kind of obvious and I am going to take it back in to another dealership that has a better reputation.
I took a video last night so you can hear the noise I am talking about.
2013 Hyundai Sonata steering column rattle - YouTube
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My 2011 sonata rattles when starting. It sounds like noisy lifters and quits after 2-3 seconds. It does not do it on the first start-up of the day, but on subsequent starts when the engine is warm.
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I've got a issue on the passenger side interior of my car that only seems to happen when it's cold/cool. I can hear a rattle coming from something plastic. I've turned off the radio and emptied the glovebox to ensure they weren't at fault.
Here is a recording I made last night with my phone. There was a decent amount of road noise on I-295, but when listening just now from stereo desktop speakers, I could hear the sound.
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I have 2011 Sonata Limited 2.4L I have a rattle that seems to come from the engine compartment near/thru the dash/driver area. I am getting pretty good at replicating the issue. When I accelerate or decelerate thru 1500 - 1700 rpm the rattel/vibration happens. If I can continue to keep the same rpm level the rattle remains. It tends to be even more frequent when the AC is on. I have had the dealer look at 2-3 times and they cannot seem to remedy the problem.
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Just purchased a pristine 2011 GLS with very low mileage. The car is essentially mint (garaged + well cared for by previous owner), but has one, occasionally noticeable issue: once warmed up, a very loud metallic buzz/rattle noise is heard from the rear of the car, particularly under low RPM acceleration. I've had many cars in the past with similar noises, which all turned out to be loose heat-shields at various locations along the exhaust systems. With this in mind, I've felt all the heat-shields on my "new" car, and they all seem to be securely in place - though some (especially the rear one over the muffler) seem to be minimally supported by design, and could potentially be resonating with certain exhaust frequencies.
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2011 Sonata GDS. I previously purchased 19" Gen coupe wheels and never had a problem immediately. Approximately 2 months later of driving with the 19" wheels, when I got onto the highway one day, the car did a slight jerk with acceleration and the acceleration halted for a split second. Ever since that day, anytime I accelerate fast and/or reach highway speeds, the car has a delay when I hit the throttle. The car then has a "rattle" "groaning" sound that comes when the RPMs hit around 2000-2500 rpm. It will go away if I drive slow speeds/slow RPMs or shut the car off for a short amount of time. I have taken my car to the Hyundai dealer 3 times. I've had the adaptive values for the transmission and engine reset and that didn't do anything. I had a mechanic ride with me in the car to make sure they were hearing the sound and the delay in shifting and the mechanic was very shocked and had never even heard a sound like this before.
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I was driving our '11 Sonata Limited 2.4 today with wife and infant son... While merging onto a main road, I accelerated to switch lanes without slowing traffic and noticed the car felt oddly underpowered.. I kept my foot on the gas, and a substantial rattle emerged from under the hood so I let off and drove steady on... We made it to our destination and I popped the hood to find oil soaked into the valve cover and head... I checked the oil and the stick was still wet, but since the car was just running I'm not sure the exact level...
Unfortunately, I recognize the noise it made on the road, and I'm 99% certain it spun a rod bearing... In other words, the engine is shot. 63,362 miles, synthetic oil changes every 4k-5k miles, dealer maintained...
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OK, I thought I saw where people were lubing certain areas for a clunk but it was a squeek.
Seems like over rougher terrain my 11 sunroof tends to clunk. However the painful part is I can't reproduce it on demand, clunk or a rattle. Its deeper in tone for sure and not a squeak.
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