Sonata NF (2006-10) :: Knocking After Fast Idle On Startup
May 26, 2010
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 feel my 2009 Sonata with 25k miles has a fast startup idle.
It goes upto 2200 RPMs. It runs fine otherwise.
I will keep an eye on it to get more RPMs and timing.
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My 06 Sonata runs very rough at start up when the car is cold. It appears that it is missing on several cylinders. This last for about 15 seconds and then the car runs fine. What could be causing this problem? No check engine light.
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My girlfriends 06 Sonata 4cyl threw a p0011 code a week or so ago. I looked online and saw that it could be dirty oil so I immediately changed it (it was about 400 miles overdue at that point). I also looked on the forums here and was referred to a thread that suggested replacing the oil control valve. My girlfriend drove to work a few times before I fixed it (maybe a 100 miles total) and the car stalled out in the middle of an intersection. I then replaced the OCV and to my discontent the problem was still very present. Very loud knocking or clanking under the valve cover and sluggish idle. Her mechanic now says that it is a job for a hyundai dealership and that it could be something as bad as a head or engine rebuild. What the problem could be?
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Sounds like a rod knock on startup but quiets after idle down. what gives and can this be a big problem? 75000 mi.
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so with the weather turning cooler i have noticed a new noise. i am at 34,000 miles and run synthetic oil ever 4-5k miles.
I hear a rattling/knocking noise when you start engine, not right away, but like after 15 seconds and it lasts about 30 seconds then seems to go away and is quiet again.
Almost sounds like a lifter is tapping due to not getting oil.
I changed the accessory belts a while ago and it did not first make this noise right after but maybe a few days after which coincided going from 80 degree weather down to 40 degree weather.
Could it be an accessory belt being too tight? If so, why wouldn't it make it on startup? I can see it going away as rubber expands as the warms but I would expect it to make the noise from starting till then. Not 15 seconds into running.
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I just bought a 2006 Sonata LX V6 a few days ago and in almost every way it seems like a great car. My '08 GLS V6 which gave me 150k great miles got totaled in November, which really sucks, but I wanted to find another '06-'08 V6. I noticed when I started it for the test drive that the car made a bit of a grinding noise on start up. I didn't think much of it and figured that the warranty from the dealership would cover any problems.(I probably should've checked earlier, but the dealership's warranty only covers cam and lifter noise and engine failure) After I looked into the issue more, I found out that it is a fairly common problem on the early 3.3's with the timing chain tensioners. I'm pretty concerned based on just the nature of the repairs and the cost I've seen for them.
I'm the third owner so the 5 year/60k warranty is expired, but I know there is a TSB out for the issue. I can't find the TSB anywhere but I've heard to have it repaired the car has to make the noise on start, sit 10 minutes, and make the noise again. If it does, the oil needs to be changed and the test repeated again. Since I'm running Hyundai 5W-20 and an OEM filter already, I tried the test on my own. It made the noise on start, sat 10 minutes, and made it again. It is only for a couple seconds, but it's still concerning to me. I guess what I'm trying to ask is if what I've described is covered under the TSB. I really don't wanna have to worry about something like that right now, so my next question is whether the issue I have is detrimental to the motor. My worst fear would be to have the chain jump a cog on the cam gear and slam valves into pistons.
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Need to determine the noise before I took the vehicle in to be serviced. I don't know if I would necessarily describe this as grinding...to me it doesn't sound like metal on metal..but it's not normal.
Only happens on a cold startup, and even then it hasn't been 100% of the time...probably 80% of the time though.
2007 Hyundai Sonata - Startup Noise - YouTube
I found this thread, Grinding Sound On Statup but not sure it's the same issue. This just started. Vehicle has 150K miles on it.
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So at cold start, my my car squeals but once I drive for a mile, it goes away. I think it is the belt. How can I test it to see.
As well, seems like it runs a little rough right now when I am sitting idle at a stop light. Could the belt be causing this?
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I am having a new problem with a clunk when I brake my 2009 Sonata. It only happens the first 1-2 times I brake while going forward. In other words, I back my car down my driveway, no clunk. Then when I drive down my street, the first 1-2 times I brake it will start slowing and then suddenly I will feel the brakes grab and it feels like a clunk (although now real audible cluck, just the feeling). after the clunk my car continues to slow as normal. The rest of my ride I do not feel it. After I get out of work, it does the same thing as I am headed home.
I have never felt this before, and find it strange that it only happens after the car has been sitting a while and goes away after 1-2 brakings.
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I have a 2008 Hyundai Sonata 2.4l with ~235,000kms (~147,000 miles). It has been well maintained and has been a great car. It has been developing an engine tick noise at cold startup and it seems to be very gradually getting worse over time. This noise is most evident immediately after strarup and gradually dimishes over a period of about a minute and varies in terms of how noisy it is and how long it lasts. This nopise is never heard when the engine is warm. From what I have read online, this can be caused mainly by two things:
- use of an aftermarket oil filter
- timing chain tension insufficient
Late last week I changed the oil filter out from the Purolator Classic filter that I have been using for years to a genuine Hyundai oil filter. This did not make any noticeable change in the tick noise so I do not believe that this was a contributing factor.
Over the weekend I removed the valve cover and checked the timing chain tension. It was taught as it should be. I could push it down a bit between the camshafts but it would spring right back up. I also used a videoscope to look down inside the cam tunnel and found no evidence of the timing chain contacting any metal or the oil drip line for the lower timing chain sprocket. Everything appeared to be in order.
When I started the engine to confirm no leaks around the valve cover, I used a mechanic's stethoscope to check for the noise. I was unable to isolate it as the engine tick did not occur at that time. The cause of the tick noise continues to elude me, but I have ruled out the two common causes (oil filter and timing chain tension).
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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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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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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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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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The car has a rattling sound on start up and I read here that is the timing chain tensioner. The quotes for fixing it has been huge(from 900-2000 just for labor).
And I changed front struts and had Monroe put on the car, the ride is very soft and a bit bouncy. I had a 2004 Altima and the ride was very stiff and I loved it. By the way, the car is a 2006 V6 with 111000miles.
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I hear a squeaking noise when I start my car. It is mostly in the mornings. Sometimes other parts of the day also. I believe it is on cold start because I usually hear it when the car has been sitting for a few hours.
My first thought was that it may be the belt so I popped the hood and looked at it. The belt seemed nice and tight and there were no cracks or extensive wear on it.
Second thought was brakes. My front brake pads are good but rear brake pads are close to needing replacement. Sometimes when I brake I hear the squeaking noise but it is hard to tell because at time it feels like it is coming from other cars.
Could the brakes be the cause of this sound? Even though it is at start up and not constant.
Car is 2007 Sonata with 100k+ miles on it.
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