Video: Noise Help

Please check video and give me some advice on what this noise is. Car runs great and doesnt make noise unless idling. Thank you in advance

link

Sounds like a diesel

Originally Posted by adaseb

Sounds like a diesel

lol a little

this happened on my car. its the camshaft tension sensor. it needs replacing every 65-75 thousand miles or so

Check out this post I made the other day. I am pretty sure this is the source of your noise:
http://forum.e46fanatics.com/showpos...87&postcount=6

Sounds almost identical to mine that I posted. But I have yet to find the source.

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Originally Posted by trace1144

this happened on my car. its the camshaft tension sensor. it needs replacing every 65-75 thousand miles or so

This is one thing I haven't replaced yet. Can we be certain this is whats causing the noise? Literally only hear it about half the time and only under idle.

Originally Posted by MJLavelle

Check out this post I made the other day. I am pretty sure this is the source of your noise:
http://forum.e46fanatics.com/showpos...87&postcount=6

I'm assuming you're not speaking about my lifters, correct? You're saying that my manifold is banging against a plate? Causing the rattle.

Originally Posted by Sal323i

Sounds almost identical to mine that I posted. But I have yet to find the source.

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Confident we'll find an answer!

No he was talking about my lifters they do tick pretty loud. Does ur diesel sound come from the exhaust manifold side of the engine?

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Originally Posted by Sal323i

No he was talking about my lifters they do tick pretty loud. Does ur diesel sound come from the exhaust manifold side of the engine?

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Dont believe so, seems to be lauder on the driver side.

uppp

really getting tired of this! seems to have become worse with the cold.

There are a lot of different noises going on in your video, but one I hear is a rhythmic type sound that seems to rise and fall as the engine idles. My experience was that this is caused by a loose heat shield over the manifolds. To see if this is the noise that is bothering you, turn on the engine, and take a long screw driver or socket extension and press down on the shield with it (again, engine running)), and see if it stops. If it does, then your heat shield is loose. It is part of the exhaust manifold gasket, so changing it out is a PITA job, and not really an option unless you are really picky. Some people have been able to just pull them out, if the crack is big enough.
I have had good luck quieting mine with self adhesive heat shield, cut in the shape of the piece, and stuck to it. It is not permenant, because the adhesive breaks down from the high temps, but it is good for a few months. I am going to drill some holes through the heat shield and the adhesive shield next time, and just rivet it to the shield. It works by absorbing the vibrations. Even just sticking it on seems to silence it pretty well.
I am not at all sure this is the noise that is bothering you, but it was worth mentioning, and easy enough for you to check out, and fix if necessary. I have included a picture of where to press on the shield, to see if it is what bothering you. This is the passenger side of the motor, just behind the SAP.


Untitled by MJLavelle, on Flickr


Edit: I see I weighed in on this earlier. I am assuming that you have already looked at this. I would tend to think it is a bad tensioner pulley, or some very noisy lifters. All of these things would sound worse in the cold.

Originally Posted by MJLavelle

There are a lot of different noises going on in your video, but one I hear is a rhythmic type sound that seems to rise and fall as the engine idles. My experience was that this is caused by a loose heat shield over the manifolds. To see if this is the noise that is bothering you, turn on the engine, and take a long screw driver or socket extension and press down on the shield with it (again, engine running)), and see if it stops. If it does, then your heat shield is loose. It is part of the exhaust manifold gasket, so changing it out is a PITA job, and not really an option unless you are really picky. Some people have been able to just pull them out, if the crack is big enough.
I have had good luck quieting mine with self adhesive heat shield, cut in the shape of the piece, and stuck to it. It is not permenant, because the adhesive breaks down from the high temps, but it is good for a few months. I am going to drill some holes through the heat shield and the adhesive shield next time, and just rivet it to the shield. It works by absorbing the vibrations. Even just sticking it on seems to silence it pretty well.
I am not at all sure this is the noise that is bothering you, but it was worth mentioning, and easy enough for you to check out, and fix if necessary. I have included a picture of where to press on the shield, to see if it is what bothering you. This is the passenger side of the motor, just behind the SAP.


Untitled by MJLavelle, on Flickr


Edit: I see I weighed in on this earlier. I am assuming that you have already looked at this. I would tend to think it is a bad tensioner pulley, or some very noisy lifters. All of these things would sound worse in the cold.

Thank you for the response! Haven't been on here in awhile. This was actually the first place i planned to look, when given enough time to actually properly get under there and see whats going on. Noise really tends to come and go day by day. Drove all the way down to philly and back last night and heard it at most twice, both times not being nearly as loud as in the video. Hoping this is the issue and when i get around to checking it out i sure will be back to give a response. Whether it's cold or warm out, hasn't seemed to make a difference. Some very cold mornings, (lower to mid 20's) she has been extremely noisy, as others she is extra quite. I try to never let the car idle more than a minute or 2 before going on my way, but the longer i wait the louder it tends to get, with no noise during driving, ever.