Dry Startup noise

[brihvac]

Is anyone else having a lot of engine tapping during start up, after the car has been sitting for awhile? Its really bothering me. It only last for a couple seconds, but its loud. I just bought the car last week and it has almost 700 miles on it.
My car is going into the dealer ,for an unrelated issue, so I think Im going to drop it off the night before and have them make a note to pay special attention to the noise at start up.
Im going to switch to synthetic this weekend, but Im not confident its gonna help.

 

[Mark_888]

This has been discussed in a thread recently:
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=2195

 

[brihvac]

This has been discussed in a thread recently:
http://www.genesisowners.com/hyundai-genesis-forum/showthread.php?t=2195

I know, it was my thread. I did not get much feedback so I put it in the engine tech section.

 

[ShoNuff]

brihvac, my V6 Gen does exactly the same thing. I took it in to the dealership and the dealership basically said "no problem - it should go away in about 500 miles or so." Well, it hasn't and the next time I took it in I had them document the fact so that down the road when the car needs a new engine Hyundai can't claim ignorance.

An oil change to full synthetic didn't eliminate the clatter at startup, though it did lessen the severity for a few weeks. Eventually, it went right back to clattering for a few seconds on startup. Since Hyundai (or the dealership) will be on the hook for a new engine (or at least a rebuild), I'm not sweating it anymore. Just make sure you take it to the dealership and get documentation of the issue (and keep the documents until needed).

 

[Mark_888]

I know, it was my thread. I did not get much feedback so I put it in the engine tech section.

That makes you a spammer.

 

[Mark_888]

I don't have that problem on my V6 with 2200 miles. I switched to Mobil 1 at 1500 miles.

I would be interested to hear how people drove during the break in period (first 600 miles) and how many miles were on the car when it was purchased?

 

[Nabber]

I don't have that problem on my V6 with 2200 miles. I switched to Mobil 1 at 1500 miles.

I would be interested to hear how people drove during the break in period (first 600 miles) and how many miles were on the car when it was purchased?

I agree. I didn't want a car with hundreds of miles for that very reason, however valid. Mine had 11 miles and no noise at this point.

 

[brihvac]

brihvac, my V6 Gen does exactly the same thing. I took it in to the dealership and the dealership basically said "no problem - it should go away in about 500 miles or so." Well, it hasn't and the next time I took it in I had them document the fact so that down the road when the car needs a new engine Hyundai can't claim ignorance.

An oil change to full synthetic didn't eliminate the clatter at startup, though it did lessen the severity for a few weeks. Eventually, it went right back to clattering for a few seconds on startup. Since Hyundai (or the dealership) will be on the hook for a new engine (or at least a rebuild), I'm not sweating it anymore. Just make sure you take it to the dealership and get documentation of the issue (and keep the documents until needed).

When I bought the car, they brought it around the lot to me so I didnt hear it start until after I bought it. If I would have known the engine made this noise I would have never bought the car. It had 100 miles on it when I bought it last week. It now has 700miles. Looks like I will be selling this car soon. Good thing I got a deal on it. I guess now I know why I got such a good deal. Im going to switch to Mobile 1 this weekend. Maybe I will get lucky. At first I believed the theory of the oil draining out of the filter back down into the pan causing the noise. BUT, seeing only a few of us are having this problem, I dont see that being the case anymore

 

[Mark_888]

When I bought the car, they brought it around the lot to me so I didnt hear it start until after I bought it. If I would have known the engine made this noise I would have never bought the car. It had 100 miles on it when I bought it last week. It now has 700miles. Looks like I will be selling this car soon. Good thing I got a deal on it. I guess now I know why I got such a good deal. Im going to switch to Mobile 1 this weekend. Maybe I will get lucky. At first I believed the theory of the oil draining out of the filter back down into the pan causing the noise. BUT, seeing only a few of us are having this problem, I dont see that being the case anymore

The oil in the filter definitely does drain back into the crankcase. I reported in other threads that the dipstick reads about 3/4 quart high after sitting for awhile. Others have reported the same thing. I also know that the oil drains back because I did my own oil change and noticed that when I removed the oil filter housing.

It is possible that there are a combination of problems, such as poor break-in routine, along with the oil filter drain-back. I rarely went past about 2200 RPM during the first 600 miles, although I did try to vary engine RPM as much as possible. My car had about 20 miles on it when purchased. I ham not sure what the minimum miles is for driving the car out of factory and at port of entry, etc.

But I have one other question: do you hear this from the driver's seat? Or do you have to be outside the car near the engine to hear it? I don't hear anything from the drivers seat, but it is possible that some noise is there but I just don't hear it.

 

[brihvac]

I hear it from the driver seat (with the door closed) a little. Im also specifically listening now. Outside the car it is loud. I start my car in the morning (with the door open) then go back into the house till it warms up. It is very noticable. The other day, when I was leaving work, There was a guy that passed my car about 30' away. As I started the car he looked back when the engine was making the noise. Its embarassing, especially on such a nice looking new car. I would agree with you about the break-in procedure, but I would think if it was not broke in right that it would make noise all the time, or every start up. This is only on the initial start up after sitting for a long time. Once its running after that few seconds, the engine is whisper quiet.

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[Poopsicle]

That makes you a spammer.

??????? No it doesn't. Just a man who wants attention for his start-up problem.

 

[Mark_888]

...This is only on the initial start up after sitting for a long time. Once its running after that few seconds, the engine is whisper quiet.

That would suggest that one of the contributing factors is oil filter drain-back. One thing I would look at is whether the o-rings on the oil filter are positioned properly. I would also make sure you get a new oil filter for the oil change and see if that helps (the oil fitlers come with 2 new o-rings). You will need to get the oil filter at a dealer, since I have not seen any after-market ones available yet.

 

[pixxiebh]

'm not positive but I think the 3.8 in the Genesis has solid lifters and if that is the case a little taping at cold startup is not unusual.

 

[brihvac]

That would suggest that one of the contributing factors is oil filter drain-back. One thing I would look at is whether the o-rings on the oil filter are positioned properly. I would also make sure you get a new oil filter for the oil change and see if that helps (the oil fitlers come with 2 new o-rings). You will need to get the oil filter at a dealer, since I have not seen any after-market ones available yet.

I bought new OEM Hyundai filters.
I am changing the oil this weekend to 5w/20 Mobil 1 synthetic. I will pay close attention at how things come out and how I put things in.

 

[ImInPA]

brihvac, in the other thread you stated that it only lasts a few second when you first start up AND after it has bee sitting for a while. I suggested to you that you were hearing the fuel injectors. You then posted that the dealer thought it was fuel injectors. If it was something with the valves or lifters, it would not go away after a few seconds.

Since you are changing your oil this weekend, I think you should do yourself a favor and try what I suggested: First thing in the morning, add plain old STP oil treatment. See if that knocks it out.

Most new engines are using very light oils 0w30 5w30, etc. These oils are extremely thin and do not leave much of a film on the metal parts. This provides marginally better fuel economy Vs. a heavier oil. The 5w20 is very thin oil. Since you are sensitive to these noises, try a slightly heavier grade and see if that doesn't fix it for you. That the "noise" goes away in a few seconds does not seem like it is anything wrong. I still think it is the fuel injectors priming combined with the oil draining back without leaving much of a film.

 

[brihvac]

brihvac, in the other thread you stated that it only lasts a few second when you first start up AND after it has bee sitting for a while. I suggested to you that you were hearing the fuel injectors. You then posted that the dealer thought it was fuel injectors. If it was something with the valves or lifters, it would not go away after a few seconds.

Since you are changing your oil this weekend, I think you should do yourself a favor and try what I suggested: First thing in the morning, add plain old STP oil treatment. See if that knocks it out.

Most new engines are using very light oils 0w30 5w30, etc. These oils are extremely thin and do not leave much of a film on the metal parts. This provides marginally better fuel economy Vs. a heavier oil. The 5w20 is very thin oil. Since you are sensitive to these noises, try a slightly heavier grade and see if that doesn't fix it for you. That the "noise" goes away in a few seconds does not seem like it is anything wrong. I still think it is the fuel injectors priming combined with the oil draining back without leaving much of a film.

I never had it back to the dealer and never said anything about fuel injectors.

 

[ImInPA]

I never had it back to the dealer and never said anything about fuel injectors.

My mistake. It was another user that was experiencing the same noise as you scott(something). It was his dealer that told him it was likely the fuel injectors. I Hope things work out for you.

 

[Mark_888]

brihvac, in the other thread you stated that it only lasts a few second when you first start up AND after it has bee sitting for a while. I suggested to you that you were hearing the fuel injectors. You then posted that the dealer thought it was fuel injectors. If it was something with the valves or lifters, it would not go away after a few seconds.

Since you are changing your oil this weekend, I think you should do yourself a favor and try what I suggested: First thing in the morning, add plain old STP oil treatment. See if that knocks it out.

Most new engines are using very light oils 0w30 5w30, etc. These oils are extremely thin and do not leave much of a film on the metal parts. This provides marginally better fuel economy Vs. a heavier oil. The 5w20 is very thin oil. Since you are sensitive to these noises, try a slightly heavier grade and see if that doesn't fix it for you. That the "noise" goes away in a few seconds does not seem like it is anything wrong. I still think it is the fuel injectors priming combined with the oil draining back without leaving much of a film.

If the noise goes away after a few seconds anyway, how is he going to correlate the STP with the noise going away, since it would take a few seconds for the STP to start working?

The Hyundai filler cap specifies 5W-20, but the owners manual also says that 5W-30 is acceptable. I suspect (as do many experts) that the 5W-20 recommendation is primarily for CAFE targets set by the US government to achieve a minimum company average MPG. But I would not go above a 5W-30. I plan on switching to Mobil 1 5W-30 EP (Extended Performance) at next oil change (currently using Mobil 1 5W-20).

 

[brihvac]

If the noise goes away after a few seconds anyway, how is he going to correlate the STP with the noise going away, since it would take a few seconds for the STP to start working?

The Hyundai filler cap specifies 5W-20, but the owners manual also says that 5W-30 is acceptable. I suspect (as do many experts) that the 5W-20 recommendation is primarily for CAFE targets set by the US government to achieve a minimum company average MPG. But I would not go above a 5W-30. I plan on switching to Mobil 1 5W-30 EP (Extended Performance) at next oil change (currently using Mobil 1 5W-20).

Why are you going to switch?

 

[ImInPA]

mark, STP will increase the film level on the lifters. The car would need to sit for a while to see if it makes a difference. My bike makes an awful racket if I use a 5w40 oil when I first start it up. If I use a 20w40, it is just fine. I only offered an inexpensive suggestion. If it makes a difference, then he would know that it is a "dry" condition. If it makes no difference, it is probably the fuel injectors priming. The 5 in 5w20 is the likely culprit if it is not the fuel injectors. STP will allow for a better film to be left behind.