Sonata NF (2006-10) :: Rear Thunk / Knocking When Braking
Aug 9, 2012
Alright so my 06 is at about 102,xxx right now and has given me no major issues (knock on wood) besides this stupid noise that I cant pin point to fix. So far I've narrowed it down to this, sounds like its coming from the right rear and usually only happens when I am slowing down and or braking. Ive also taken note that it only happens when its really hot outside , all signs have been pointing to the rotors and brakes but i need some thoughts/opinions on what else it could be before i shell out almost $200 to get my brakes fixed. Here are some more details about the car
Rear pads replaced sometime last year they still have meat on them but i did not replace rotors nor did i get them turned.
I am sure that the noise is coming from the rear, ive been half way in the trunk while my buddy drove and i hear it coming from right rear.
Shocks have been replaced (noise was occurring before replacing them)
Nothing seems loose everything seems to be tightened down right.
Tires are brand new (noise was there before getting tires and after)
Mufflers are secured normal wiggle mounts look good.
Emergency Shoes have never been replaced but look ok.
Wheel hub looked great when i took it apart (Looks new doubt its that)
It happens when I am braking from 35mph below or sometimes 0 to 35 40mph rolling no braking then it goes away.
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When accelerating and/or braking, a thumping or knocking noise comes from the rear of the car. I do not believe it's my shocks, as there is no noise when going over bumps, only accelerating and stopping. What may be the cause? Control arms maybe?
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My 06 Sonata LX 3.3 has me smiling except for two items, MPG, which I hope will improve after break-in, and a "k-thump" sound from the area of both rear tires. It occurs as I pass over fairly small bumps and ridges in the pavement, and remind me of the sound that is made by a bad shock. I took it to the dealer at 900 miles. They drove it and inspected the rear end and proclaimed all was OK. They claim it is caused by the low profile tires. I have never had low profile tires before, but it seems to me if that were the cause, the front tires would make the same sound, but they don't. The front end is sooo quiet. All tires have the recommended 30 PSI.
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I just bought a 2007 Sonata V6 (GL or GLS). Before buying the car, the last owner had the rear brakes "serviced" because the mechanic said the brakes were "sticking" - charged the old owner $300 for it. When I am on the highway and I brake, the rear brakes shudder. Do you think the shudder is because the rear brakes are still sticking, or because it needs new rotors?
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For the last year or so i have been annoyed severely by a clunking knocking sound from the rear (possibly passenger side) of the car. The noise occurs when there is torsion occurring or a sudden change of direction. I can go over a huge speed bump or pothole and not hear a thing yet the slightest change in direction or torsion will cause this extremely annoying heavy metal clunking knocking sound. I tightened every suspension system related screw in the rear of the car and the noise is still present.
The car is lowered on H&R springs (approx. 1.4 drop) so im wondering if maybe there is an additional stress that has been torturing the sway bar links for the last 3 years causing this noise. Or could it be the shocks (which are working properly)?
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So I lowered my car, and I really don't have any issues. Running 19 inch wheels and I upgraded all suspension components.
Shocks, Struts, Springs and before I did that, I had new adjustable ball joints installed. I am still having some small vibration once I get around 70mph. Also, I have that infamous THUNK** when I hit a big dip. So I looked for the adjustable control arms and they are about $345 and kspec nor Sharkracing has them in plus I am not even wanting to spend that anymore.
I am trying to determine the small vibration as I replaced 3 of the 4 ball joints with that being the 2 upper and left lower and did not replace the right lower because the mechanic said I did not need to as it was in good shape. I am wondering if that is the cause of my slight vibration or if it is just the road.
Onto the clunking, I think I am going to just order Moog upper control arms and replace them myself. It sucks to go backwards from adjustable ones but seems like no one here on the board has had any alignment issues with running regular control arms with the bigger rims. This was my main concern. So I am going to order them this morning.
Now what I am not too up on is sway bar bushings. Can these cause vibration and how hard are they to fix? Just read that you can tell if these are going bad by turning left of right quickly. Guess I don't need these yet.
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2006 Sonata 2.4 GLS. My car has done 60000 miles and has developed a creaking/knocking (metal on metal clunk) sound at the left rear. it is only noticeable at low speeds when accelerating and decelerating in stop start traffic.
It is not the shock as I have removed the shock and driven the car and the noise is still there, I have also looked at all the bushes and nothing is obvious. I have also checked tightness of all bolts/nuts.
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Under heavy braking, both of my ISF's experience a repeated "thunking." Brakes are fine, rotors aren't warped, and you don't feel anything through the pedal. Rather, it's felt through the floorboard. I bought upgraded LCA bushings, thinking this would solve it, but it persists.
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Ok so my left front wheel hub (from what it sounds like) might be on its way out. Upon braking there is a "thunk" that sounds like its coming from said wheel hub and I can feel it in the floor. Also when turning sharply at low speed in (either in 2h 4h 4l) and then braking there is also a lovely grinding noise coming from again what sounds like the wheel hub area. So without tearing open the wheel hub what can I do to actually properly diagnose without taking it to a shop.
Also, lets a assume its the wheel hub and associated parts, what all do i need to buy parts and tools wise in addition to the wheel hub itself. I've seen 2 or 3 trucks so far this winter with shattered hubs.
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I have a 2006 Sonata - LOVE this car. Lots of miles on it - 180,000 well cared for and routine maintenance done. I have a knocking sound from the motor AFTER it warms up.. Drives wonderful starts perfect. Mileage good as always.
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Few days ago I noticed the noise coming from the engine.
Went to dealership. They removed the oil pan and found metal shavings there .The car has 90,000 miles. They will put a new short block (will be covered by warranty ).
Since they basicaly will disassemble the whole engine, I thought to ask them to replace also drive belts, timing chain tensioner, not sure if the short block comes with the water pump , will ask them . W
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I have a 2009 Sonata Limited (4 cyl), and since the beginning of the summer, I have had a knocking/creaking type sound coming from both the front AND back of the car, which feels like is coming from underneath. I can feel it in the floor when it gets really hot, and therefore really bad. I hear it almost exclusively while accelerating or coming to a complete stop. When it gets really hot out, I can hear it very slightly while driving at slower speeds, but that's about it. Has no correlation to making turns, as would be the case with a tie rod.
I find it extremely strange that this is happening only in the heat. When it's cooler out, say below 80-85 degrees, there is no sound whatsoever. The car runs phenomenally otherwise, very quiet. Based on some stuff I've read, it seems like a suspension issue is a possibility? I live in a neighborhood with extremely poor roads, and actually live on a dirt road.
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2008 SONATA i4. The transmission started to whine a lot when first driven when cold, well transmission was replaced under warranty due to "pump failure"? I noticed that the loaner car I received for tranny replacement had a knock at startup so I called and told the dealership about it, they said it was the timing chain, it was a v6, oddly it didn't sound like timing chain to me, started after fast idle and went away within about 100 feet of driving.
2 days after I got my car back it would knock after I started it up cold when it came down off fast idle, and would knock for about 100 feet of driving or so, then the knock would disappear until the next cold start. exactly like the loaner V6. Well took my car in to have it looked at, got another loaner, 09 sonata I4, same knock, service couldn't replicate problem with my car.
Went ahead and got oil change, drove car home and the next day it had the same knock at startup when cold. Just took it back to dealership to have them look at irregular tap/knock when warm at idle, also car still has startup knock, but just not as loud.
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I have a 2007 sonata 2.4L with 93k miles that has a knocking sounds coming from the bottom of the engine. It seems that it is a bad rod bearing and was caused by low oil levels. I did not know that the oil was that low (3 quarts low) It started about a week ago. I know I'm gonna have to put it on jack stands and drop the oil pan.
By the way, Here is a video I found and it sounds similar to my car. Here's the link : 2.4L Theta Engine Noise - YouTube
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2005(its NF model) Sonata 2.4 petrol manual. 75000 miles. On cold start makes knocking sound( sound like Diesel). After coupe of minutes when warms up the knocking sound gone.
Also when i start driving( still on cold engine) i hear that sound only when i let go from gas pedal and only in range of 1800-1500 rpm. When i accelerate i don't hear that knocking sound.
I think is not belt tensioner because sound is much longer than couple of sec.
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I own a 07 Hyundai Sonata Limited with 31000 miles. It is 20 degrees today. When I start the car up there is this knocking sound from the engine. Once the car warms up the knocking sound only happens when the car is in drive or reverse. When the car is in park or neutral it is fairly quiet. The sounds is still there but not as loud as in drive or reverse. I have done the routine synthetic blend oil changes between 3500-4500 miles.
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I have a 2006 Sonata GL, 2.4L, manual transmission, with about 130K miles. It has recently developed a knocking noise. The noise sounds metallic.
Some data: timing chain, guides, tensioner are all new, the noise is not coming from there.
Compression tests on the 4 cylinders came back with 200, 200, 180, and 200 psi readings. Tests were performed 3 different times, same gauge, all numbers came back the same.
The noise comes on only under acceleration (gas is supplied), and even then it's not consistent. For example, accelerating at 2500 rpm will make the noise, but the noise will go away at, say, 3000 rpm, while accelerating. Then again, the same thing can happen at 3200 rpm: accelerating will cause the noise, but up to a point, beyond which the noise goes away.The noise is not present at idle. I can always make the noise heard, just not consistently at the same rpm range.
I ran the engine with one spark plug disconnected at a time: the noise goes away when the #3 cylinder spark is disconnected.
Opinions vary: wrist pin, piston slap, rod bearing, etc.
Any tests I could run to narrow the problem? It has been difficult to pinpoint where the noise is coming from with a stethoscope...
Oil changes have been very regular (3.5K), using Mobil 1. Nevertheless, it has been burning oil.
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I get a pop or a clunk from the front drivers side when I brake. It used to happen less often but I took it to the dealer to fix and they lubricated the caliper pins and now it happens frequently. I've read that the Sonata has some issues with the calipers. I would like to repair it and lubing the calipers made it worse.
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I have an '08 GLS and I've been hearing a "pop" noise coming from the rear passenger wheel well when I am braking. It only happens once per braking episode and usually if I am applying medium brake pressure, i.e. slowing from >25 mph. What this might be and is it normal?
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Noticing excessive vibration when braking after 50-60 mph speeds.
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My 2007 Hyundai Sonata has a knocking sound when I put my foot on the brakes. It has 82,000 miles. It still has the 100,000 mile warranty. The brake shoes was replaced last year. Does it need new shocks?
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