Sonata NF (2006-10) :: Engine Knocks For About 30 Seconds And Then Stops When Cold
Sep 12, 2012
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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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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Have all kinds of front end knocks and clunks going over bumps and when stepping on the brakes when backing up. Looking to make a parts list to replace everything at once. I see the upper control arm has 2 bushings and a ball joint, the lower control arm has a bunch of bushings and a ball joint. What else should I replace?
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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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Engine seems to knock real bad after engine gets hot like its out of time if unplug the vvt solenoids it runs great something is telling them to adjust timing to much.
When it came in it had a cam code and i found cam sensor was broken it had new installed found part of other in engine. Phaser was damaged replaced it. still did it after.
Then I pulled front of engine apart found chain tensioner leaking oil around gasket and then we decided to re time chain. If still doing it.Will let know after air mass meter.
PS no codes at this time
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When it's really hot out and I'm highway cruising my ac stops cooling for about 5 seconds when I let off my gas to slow down then I feel a small nudge and it's cold again.....
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I can here this squawking under my hood for 30 sec or so after every engine stop, when parking. I purchased the car used with 19,500 Kilometers. This noise has always been there. Is this normal? I believe the noise is from the inverter coolant pump? I don't hear this when the car is running, but then my hearing is not the greatest?
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My 2006 Mountaineer 4.6 is ticking at start up, and it gets quieter after about 30 seconds. Does this sounds like the cam phaser?
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I bought a 2006 Lexus 430sc 2wks ago with a service contract that the car dealership says will kick in 30 days after purchase date 3/30. Yesterday the issue start (11 days before service contract starts). Engine stops ~5seconds after I start car. Everything sounds great but the engine just stops. What may the issue be but also should I wait 11 days before addressing issue to have service contract kick in. It's a high end bumper to bumper 3 year service contract.
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Ok, got a hesitation when the engine is cold, almost feels like a miss. Dealer could not find anything and there are no engine codes. They wanted to replace the plugs with new platinum plugs. I said did you pull any plugs, not that is what the tech said it could be. Could it be the Mass air flow sensor? Or a coil. After a mile or 2 it is fine. I switched to shell premium since dealer told me I had to get a decarbonization from using cheap gas. I used exxon regular and BP regular with a treat of premium every few tanks. But now I am on shell and they said I needed another decarbonization, This is getting rather expensive, I may go back to my local mechanic once the warranty is out. But the hesitation puzzles me.
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My car also had the hard downshift when engine was cold and under 30mph. I seen where Sbr 711 had posted the TSB 10-AT-007-1
I printed this and took to the local dealer & also showed where it was mentioned as a recall.. The advisor looked up on his computer and showed no recalls for the 09 sonata?
I went ahead and scheduled the reprogram update and was told the technician can pull up more info on recalls than the advisor can? Any way they did the reprogram today and $89. later still no recall? How do I prove that in fact this is a recall & get refunded?
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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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Has the engine cover on, hear rattling when they first start up their car? It only last about three seconds, and its only from a cold start normally.
I was told not to worry about the sound because its just the engine cover rattling a bit, but it is rather annoying. It makes quite a racket. Should I just take the cover off?
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Recently, our 2009 Sonata jumps to relatively high and not normal RPM when start cold (and I don't mean winter-cold; I mean first start in the morning). It jumps to around 2500 rpm for 3-4 seconds before it goes down to the normal 1200-1300 or so for a cold start.
Also, not sure if this is the normal Sonata engine sound, but when we push the accelerator it sounds like the engine is knocking, almost like a whistle of fuel flowing.
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My 2009 Sonata 2.4l Sonata has been making a loud knocking noise when it is cold, but it will fade to almost nothing after it warms up. I tried to make a sound clip of the noise, but it was so distorted that I could not even make out the noise on the video.
For some strange reason the noise matches the skipping problem I have been complaining about since the beginning. Yea it's still there. It sounds like it is in the valve system, not the lower end. It leads me to believe it's coming from the valve clearance/ camshaft area.
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My 09 Sonata LTD V6 was sometimes idling erratically (revving and slowing) after starting a cold engine. It never happened in the previous 3 winters I have owned it. I took it to the dealer for service and they said an ECM update was just released, described on the invoice as "TSB 10FL002 FOR COLD START ROUGH IDLE".
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My 2006 Sonata has 63K miles and today started jerking (Hunting) after about 10 miles. Here is what I know. It starts on a level run and disappears when on an incline, but as soon as the crest is reached, and on the downside, it starts hunting again. When it is jerking, around 55 to 60 mph, I switch the transmission lever to Autostick and it stops, back into drive again and it starts again. This is so repeatable there has to be a connection. EVERY time I switch to Autostick the jerking stops, end when I put it back into drive, it starts again. The jerking is severe enough that it is easily detectable. It appears that when the transmission is under load, like going uphill, the jerking stops.
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I'm having 2008 Sonata Limited model with 60k miles. i was on a busy street when my 08 Sonata died and i had to coast into a parking lot put it in neutral and restart my car. This is happening two or three times per week. I reported this issue to nearest hyundai dealership and they are not able to figure out this problem. Again this week I am taking this car to them to find out the root cause. What it could be?. Right now I'm kind of scare to take this car to outside.
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After driving my 2007 sonata for around 10 minutes, there is a very high pitched squealing sound that is intermittent and stops when the brakes are tapped. I was told it may be due to a "brake sensor"??
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It's my 2005, 2.7l. auto trans, FWD.
AC stops blowing cold when the engine temp get hot. As long as the car is moving, it blows nice and cold. Also, when sitting the engine temp rises quickly and will over heat if you don't get moving.
Cooler fan on the inside of the radiator never kicks over to high mode as the temp goes up. I checked the fuses and the relay and both are good.
That leaves me with a bad fan? Correct? Also, what is the part number of the fan?
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