2009 Genesis 4.6 Engine Knocking

[jda8]

Hi all. I have a 2009 4.6 with 34,000 miles. Luckily I also have the 100,000 CPO Hyundai "bumper to bumper" extended warranty, for which I paid extra. About a week ago, I started my car which was parked in the garage. I immediately heard a loud knocking sound from the engine, a very unhealthy noise my car has never made. It sounded as if maybe I had a bad lift (I think that's the term) and the oil was not getting up inside the engine to lubricate it. I drove around and it never stopped; it knocked while idling and driving. I then called the local Hyundai dealer and scheduled an appointment the next morning. When I arrived, the young tech told me Hyundai issued a TSB a while back stating an older-styled oil filter could cause engine knocking. I said that this sounded much more serious than just an oil filter problem, but lo and behold, thirty minutes later I was told that the knocking was, in fact, caused by the old oil filter. They told me they installed a new oil filter pursuant to the TSB and added an "oil additive" to the engine. Since then, the knocking sound hasn't happened at all.... Until tonight.

Tonight, I pulled my car over parallel to the sidewalk and heard the knocking again. It's doing it again. It's maddening! Any ideas or suggestions? What should I do? Thanks in advance.

 

[Mark_888]

The 4.6 V8 experienced some problems under the following conditions happened:

• Engine was started and shut off within a minute or so
• Engine was restarted (immediately, or at some time later) and engine starts making a lot of noises and seems to misfire. In some cases, engine parts may be damaged when this happens.

This is caused by some of the engine parts not returning to correct position when engine was started and almost immediately shut off before the engine warmed up. There are many threads on this forum about that situation.

Of course, your problem may be something else besides the above, but my suspicion is that there may be some permanent engine damage.

 

[Alwaysforward]

Hi all. I have a 2009 4.6 with 34,000 miles. Luckily I also have the 100,000 CPO Hyundai "bumper to bumper" extended warranty, for which I paid extra. About a week ago, I started my car which was parked in the garage. I immediately heard a loud knocking sound from the engine, a very unhealthy noise my car has never made. It sounded as if maybe I had a bad lift (I think that's the term) and the oil was not getting up inside the engine to lubricate it. I drove around and it never stopped; it knocked while idling and driving. I then called the local Hyundai dealer and scheduled an appointment the next morning. When I arrived, the young tech told me Hyundai issued a TSB a while back stating an older-styled oil filter could cause engine knocking. I said that this sounded much more serious than just an oil filter problem, but lo and behold, thirty minutes later I was told that the knocking was, in fact, caused by the old oil filter. They told me they installed a new oil filter pursuant to the TSB and added an "oil additive" to the engine. Since then, the knocking sound hasn't happened at all.... Until tonight.

Tonight, I pulled my car over parallel to the sidewalk and heard the knocking again. It's doing it again. It's maddening! Any ideas or suggestions? What should I do? Thanks in advance.

I recommend you take it right back to your dealer and tell them their oil filter fix did not fix the problem.

 

[mtrot]

Check out the thread here, "rattle at start up", which has a lot of info, including info on the relevance of oil filters.

Over the Christmas holidays, my 2012 4.6 sat in the garage for about 5 days. When I next started the car, it produced a horrible clattering that went on for a good 5 or 10 minutes. I drove straight to the dealer, but by the time I got there the engine sounded virtually normal. As I drove the car for a couple weeks after that, the problem with start up clatter seemed to go away. I can only assume that it's a bad thing to let these cars sit a long time without running them.

 

[jda8]

Update:

Just left the Hyundai dealer. I was told that one of my lifts is bad. You'll note in my original post that I said the sound the engine was making sounded like a bad lift.....I guess I was right. I was told they have to tear the engine apart. They ordered the parts today and will contact me in a couple of days when they come in. In the meantime, I'll be driving my Genesis since I was told by the dealership that it's ok to drive. I only live half a mile from my office.

The good news is that it's covered under warranty (it only has 34,000 miles) and I'll be given a free loaner while they have my car in the shop for a few days. I'm glad everything will be free and I'll have another car to drive, but I'm just surprised that a problem like this is arising with only 34,000 miles. The dealership told me that there are many reasons why this could be happening, and that there's a good chance the previous owner did not use the "right" kind of oil and/or didn't get it serviced as he should have.

Thanks.

 

[Mark_888]

Update:

Just left the Hyundai dealer. I was told that one of my lifts is bad. You'll note in my original post that I said the sound the engine was making sounded like a bad lift.....I guess I was right. I was told they have to tear the engine apart. They ordered the parts today and will contact me in a couple of days when they come in. In the meantime, I'll be driving my Genesis since I was told by the dealership that it's ok to drive. I only live half a mile from my office.

The good news is that it's covered under warranty (it only has 34,000 miles) and I'll be given a free loaner while they have my car in the shop for a few days. I'm glad everything will be free and I'll have another car to drive, but I'm just surprised that a problem like this is arising with only 34,000 miles. The dealership told me that there are many reasons why this could be happening, and that there's a good chance the previous owner did not use the "right" kind of oil and/or didn't get it serviced as he should have.

Thanks.

More likely is that the Tau V8 was a brand new engine for Hyundai starting in 2009, and there were some kinks in the design. As you can tell from the threads linked in the above posts, do not ever turn the engine off before it has warmed up.

 

[scottdk]

OP, you should post a video of the engine sound if you have time before the repair is done. I have an intermittant noisy engine, but my dealer has found nothing wrong and I'm sure the noise you have is loud compared to my "tick". I also have done multiple engine oil analysis' and the results of those tests also indicate a health engine. 39,000 miles on mine.

 

[homeofstone]

Update:

Just left the Hyundai dealer. I was told that one of my lifts is bad. You'll note in my original post that I said the sound the engine was making sounded like a bad lift.....I guess I was right. I was told they have to tear the engine apart. They ordered the parts today and will contact me in a couple of days when they come in. In the meantime, I'll be driving my Genesis since I was told by the dealership that it's ok to drive. I only live half a mile from my office.

The good news is that it's covered under warranty (it only has 34,000 miles) and I'll be given a free loaner while they have my car in the shop for a few days. I'm glad everything will be free and I'll have another car to drive, but I'm just surprised that a problem like this is arising with only 34,000 miles. The dealership told me that there are many reasons why this could be happening, and that there's a good chance the previous owner did not use the "right" kind of oil and/or didn't get it serviced as he should have.

Thanks.

Don't be too surprised. A bad component can slip though quality control sometimes. I had a new top of the line 1989 Mazda 929 that developed a knock at about 6000 miles and the Mazda dealer had to replace the engine. The car was then fine for the rest of my ownership. I then purchased a new 1993 Mazda 929 which was also an excellent car.