I've started hearing a nasty buzzing noise at between 4 and 5k RPM. I can't hear it at all outside these ranges. It seems to be from under the car- but it could be coming from anywhere. My car is a totally stock 2000 Type-R with ~47k miles.

I've already been under the car and can't find anything that's loose- knocked on all the heat shields, and checked all of the exhaust hangers.

Have any of you run into this before? Any thoughts on what else to check?

Thanks in advance!

Larry

 

It is the 2-1 portion of the stock exhaust manifold itself. It's double walled, and the inner wall eventually breaks free and will vibrate against the housing.

 

Time for a new header.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by LIS &raquo;</TD></TR><TR><TD CLASS="quote">I've started hearing a nasty buzzing noise at between 4 and 5k RPM. I can't hear it at all outside these ranges. It seems to be from under the car- but it could be coming from anywhere. My car is a totally stock 2000 Type-R with ~47k miles.

I've already been under the car and can't find anything that's loose- knocked on all the heat shields, and checked all of the exhaust hangers.

Have any of you run into this before? Any thoughts on what else to check?

Thanks in advance!

Larry</TD></TR></TABLE>

You sure you got all the head shields off? There's one that's a bitch to get off b/c it's tucked up above the b-pipe, so you have to drop it down to get the bolts out of the head shield. Also, the heat shields on the actual exhaust manifold have been known to rattle too.

 

I know exactly what your talking about. My friends r is the same way... 3-4k rpms.. sounds like its coming from front right?

 

I can't remove them, but I did check every one that I could see. I autocross in DS, and can't legally remove anything before the cat so the heat shields have to stay.

-LIS

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by ebelp &raquo;</TD></TR><TR><TD CLASS="quote">You sure you got all the head shields off? There's one that's a bitch to get off b/c it's tucked up above the b-pipe, so you have to drop it down to get the bolts out of the head shield. Also, the heat shields on the actual exhaust manifold have been known to rattle too.</TD></TR></TABLE>

 

Yes- that's it exactly! It's driving me nuts.

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Doostur &raquo;</TD></TR><TR><TD CLASS="quote">I know exactly what your talking about. My friends r is the same way... 3-4k rpms.. sounds like its coming from front right?</TD></TR></TABLE>

 

If this is the case- it sounds like the only fix is a new manifold. I wonder if I can get it done under the emissions warranty...

Is there any way to confirm that this is really the issue, short of pulling the manifold?

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by D &raquo;</TD></TR><TR><TD CLASS="quote">It is the 2-1 portion of the stock exhaust manifold itself. It's double walled, and the inner wall eventually breaks free and will vibrate against the housing. </TD></TR></TABLE>

 

Can you have someone rev the car up while you listen for the rattle?

 

My friend never found out what it was... it does it sometimes... randomly. Let me know if you figure something out.

 

ran into this before; was the header with double walled tubing, but can it be your b pipe also?

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by AllMotr &raquo;</TD></TR><TR><TD CLASS="quote">ran into this before; was the header with double walled tubing, but can it be your b pipe also?</TD></TR></TABLE>

It could really be a number of things. I have heard rattles from the manifold, heat shields, cat, and even after market headers.

 

The hydraulic motor mount on the timing belt also gets an anoyying buzz when its going out right at 3500-4000 rev's check its conditon. easy to remove and inspect of car to be sure its ok.

 

chiming in way late to see if you ever discovered what the problem was. my car does th same thing.

 

It was weird, mine did the same thing when I first got it... The weird thing being, none of my exhaust components are stock.

Turned out that my CAI was loose, and was vibrating.

 

I wonder if he ever fixed it. I'm still curious on what it was.

 

Bringing this thread back from the dead..

Havn't driven my ITR in a week, and mid way to work I started to get this buzzing/scraping noise around 4-4.5K in every gear. The car drives perfectly fine, but it just makes this nasty metalic rattling sound only when you hit that RPM range.

I'll have to check out the heat shields when I get home. My ITR is all stock except for a CAI.

 

I just installed my stock exhaust, gutted car sound cat, and JDM header the other day. I noticed some "tinging" noises at certain RPM ranges also. But I havent gotten a chance to take a look yet. knowing my car, it could be a couple thousand things lol

 

Just to update. since there is no real solution to the original problem.

It was the cat heat shields rattling. The weld looks like it broke on one side. Just took some wire and wrapped it tightly around the heatshield and voila.. no more rattle.

$1 fix until the shields really break but my shields look like their in perfect condition.

 

Read my post on Team Intgera forum.
I fix my rattle by weld the inner tube. 99% this is your problem. Check it out and if the inner tube is loose just weld it to the outer and you done. After I fix that my car souds like brand new.
http://www.team-integra.net/fo...earch

 

That wasn't my problem.. my problem turned out to be the cat sheilds rattling. My wire trick was much easier fix than the problem you're referring to in your link.

I didn't have to remove anything off the car, I just wrapped a piece of metal wire around the whole cat and twisted the ends. lol..

This post finally has some solutions for people in the future who are experiencing this rattling problem.