Sonata NF (2006-10) :: Rattle On Cold Start That Lasts For 5 Seconds
Sep 25, 2015
Two months ago I bought a used 2006 Sonata v6 with 54,000 miles. After a few hundred miles I began to hear a rattle on cold start that lasts approx 5 secs. I did my research and saw the TSB concerning the timing chain tensioners. The TSB instructs the dealer to turn the engine off after reaching operating temp then restart after 10 minutes. If there was no noise after the ten minute start then the car is operating normally. My car does not rattle after the 10 minute start up. I just can't see this as a normal characteristic. What could be causing this noise?
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2006 Sonata LX. It's only on a cold start up and lasts for about 30-45 seconds tops..and then it goes away. Car has 74k on it. Treated well. Only use synthetic oil and no check engine lights. Last oil change I put 5w 30 in it. I know it says to use 5w 20. Could this be the problem?
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Yesterday i went to mechanic and changed Timing chain tensioners, with chains and all guides. But still have 2 second voice on startup, once oil pressure lights off everything fine. I paid heavy price on parts and labour but very disappointed after hear same noise again today morning which i was listening from one year purchase of this car... Sonata 3.3l v6 ....
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So I installed my intake....again this weekend and have been monitoring it to make sure it doesn't pop off again. When you first start up, there is a very loud growl coming from the intake that lasts about 20 seconds. I also noticed that the breather filter kicks in during this time as well. Is this normal? I would yes but want to understand exactly why...
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From time to time I get this high vibration on start-up of the car. It almost seems like more of the engine noise and vibration is coming through to the cabin. It only lasts about 5 seconds from initial start up and the rpm does not change and stays constant. This only happens maybe once every other week or once a month. What or why this could be happening?
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I have a Hyundai Elantra Limited 2012. A few months ago the Short Block was replaced because the engine was noisy. Now it started to do that noise, if I remember it's a little bit similar : Youtube video: [URL] .... Or search youtube for: Hyundai elantra 2012 engine rattle noise
It rattled very loud for 1 or 2 seconds on a cold start the other day too. Noise appears to be coming from the engine. It does it pretty much all the time, at idling, when I accelerate it accelerates too and when I slow down it kinds of do too slowly. Need another new short block or is it something else like the timing chain or a bearing?
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I started having an issue when the weather changed here on the East this weekend. When I start my car in the morning the engine knocks for about 30 seconds and then stops. I also recently got an oil change at some local mechanic shop and wondered if that might be the issue. I checked the oil and it was stellar this morning but I'm not sure what kind they put in there. I would assume it's the required type.
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I have an '05 FX4 with 5.4 and 55,000 miles. I've noticed that once in awhile when starting the truck after it has sat for at least a day I get a type of growling noise that lasts for a second or two. It usually happens shortly after the engine starts up and gets running, but it has also happened after it has run for a minute or two and then makes the noise when I give it some gas to take off. From inside the cab the sound seems like it is coming from the driverside firewall area, but on the rare occasion that I'm able to start the truck and jump out before it makes the sound it sounds like it is coming from underneath the center of the truck. It doesn't make the sound every time on a cold start and never makes it on subsequent starts. I drive truck during the week only drive my Ford on weekends and sometimes it goes longer without being started, but I don't know if this has anything to do with it.
I thought it was a shield vibrating or something but have also heard that the VCT parts can make a rattling sound on a cold start also and this has me a little worried. This sound seems more like a fast growl than a rattle, but it happens so fast it's over before I can really register what it is. One time it made the sound twice, once after startup and again after it had idled a minute or two, thats when it seemed like it came from under the center of the truck. The engine has had a slight cam phaser knock since new, but it is so quiet that it can only be heard if you're inside a building or next to a wall and roll the window down.
Also, I change the oil every 2500-3000miles and only use Motorcraft 5w20 and a 820S filter, and generally baby the truck. What this could be. The truck runs great all the time, I just get this noise occasionally after cold start.
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I have an '06 trailblazer with the 5.3 engine. When it's cold outside Freezing and below. The engine will start. Run for three seconds. And shutdown. Pass lock light stays solid. The engine won't crank for about a minute. And it'll do the same thing. If it's about 40 or above. No problems.
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I have a 2013 elantra with about 26,000 miles on it. I usually don't use it on weekends and on Monday's it makes a noise that lasts about 3 seconds. I believe the noise comes from a pulley that is not turning.
When this first happened, pulley had a couple of lines where paint peeled off and now the pulley has almost no black paint left. Took the car to dealer, explained how the noise only happens after not using the car for a couple of days, and they have not been able to repeat the problem, they indicate that they can't replace the pulley for this reason and that the wear on the pulley is normal.
What is causing the issue?
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Every once in a while, I hear a sound coming from under my car, possibly the passenger side, that sounds like I am pulling a tin can around. It only lasts about 3 seconds. Sometimes I'll hear it when sitting at a red light, or accelerating from a complete stop. Then the sound disappears. This doesn't happen all the time, but I do feel like I'm hearing it more often as time is going on.
I did a little research online, and some say it could be a rock under my heat panel, but that seems too easy. I don't have any issues with shifting gears or accelerating.
2000 GMC JIMMY 4x4
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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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2011 Santa Fe 3.5 L
I've isolated this rattle down to the cam phaser( CVVT) in the right cylinder head. It rattles bad for 2-3 secs on cold start or after it sits for 3 hours.
I've put in 5w20 synthetic oil and synthetic Lucas additive and it cleared up the noise for short interval start ups.
I changed the cam phaser in the right head with a used one ( 40k ) but it didn't make a difference. I should change out the attaching cam as well.
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The engine starts with knocking, rattling, and vibration that lasts for about 5 seconds. It seems to be an intermittent, rare event. With nearly 250,000 Prius in the North American market and the onset of cooler weather, it is time to see how frequently this occurs.
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This has happened twice so far, both with around 1/2 tank. After driving for ~25 minutes to work, I will go to shut the car off, and after pushing the key in and pulling it out, there is a mechanical noise from the rear of the car that lasts for about 2 full seconds. Is this the sound of the fuel pump on its way out? Or just an electrical gremlin (no! not in a VW!)?
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I have a 2003 Subaru Forester with 240K miles on it. When I start the engine in the morning, there's a squealing noise under the hood that lasts for a few seconds. (Usually goes away as soon as I pop the hood and look at the engine.) I think it's one of three things: AC compressor, alternator, or power steering pump, but I haven't been able to isolate the noise to one of the three. I don't want to wind up replacing all three.
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I just bought a used 2003 Pilot with 62,000 miles. I quickly noticed a that I hear a faint rumble sound that lasts about 2 seconds at speeds between 30 and 40. It sounds like I ran over a very short and shallow rumble strip. It can happen very quickly as I slowly accelerate. It only happens once, but not every time that I slowly accelerate. It also happen as I am coasting at these speeds. I took it back to the dealer, but they are puzzled. They thought I was crazy until I took them on a test drive and we eventually heard it. They tried adjusting the sway bar, but the sound continues.
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I have a 2005 Honda CRV with 139,000 miles that recently developed a miss. It usually does it while holding steady at 50 mph but only lasts for a couple seconds. If it misses may do it once or twice and then nothing the rest of the day. Had the dealership put it on the computer for a reading and they said it's showing no misfires and is running properly. Plugs have been changed other maintenance performed and have had absolutely no issues until now.
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Could not find anything about this on a search. I have 2 Sonatas. An 08 and an 09 both are 4cylinders. The 09 was purchased used in June of this year. With the colder weather setting in I have noticed that the 09 when started from cold jumps to 2500 rpm and settles to around 1000rpm for a short time then slows down a bit more to what I think is the normal idle speed. My 08 never goes that high and settles down to a normal idle quicker. If I read correctly the 08 and 09 have different air metering systems. Is this idle thing normal or am I dealing with an issue?
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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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The last couple of times I've started the car from a cold start the RPM's fluctuate up and down for about 30 seconds and then it stops.
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