Bad Exhaust Install?

**bennet654** · 05-03-2011 04:01 PM

If you purchase some Energy Suspension Motor Mounts or a Torque Damper it should solve this problem if it persists after your booking today

These mods keep your engine from moving when the car is revving and therefore should minimise any rattles of the exhaust

**NightKids** · 06-03-2011 11:15 AM

Update: Took it thr exhaust place guy, ultra rude and just said he couldn't find any vibrations. Just drove my car out of the workshop and left it there.

Took it to Midas and he couldn't spot anything. I then took it to my mechanic, we jacked it up a few times and nothing was really hitting... he hit the cat a few times and we could hear this lil tingling noise but it sounds nothing like what's in the car.

I'm totally confused what it could be? I recall someone saying that this happened to them when they were running a stock muffler? I'm running a DC2 Type R stock muffler, could this be the problem? Stock muffler can't handle the extra flow?

If anyone wants to meet up in Melb let me know! Let you hear it in person and hopefully someone can help me out here! lol

**hisoka** · 06-03-2011 12:09 PM

how many peice is your exhaust.

from cat back how many other joins is there. b pipe and axle back ?

or just one long pipe after the cat all the way to muffler ?

your muffler is most likely causing some mad turbulence.

it happens on turbo cars alot, so much so that oil gets sucked straight out of the turbo

**NightKids** · 06-03-2011 02:42 PM

Well I basically got my headers, then this race pipe thingy that goes to the cat. From the cat it's welded to the B pipe and then goes to the axle back (stock Type R muffler)

**hisoka** · 07-03-2011 12:05 AM

remove axle back. drive the car and see if the noise persists.

it would most likely be the b pipe welded to the cat is touching frame around the join somewere if it isnt the diff back

**thaizeg** · 07-03-2011 12:35 AM

From where ur headers bolt up to the cat... Check if there is a gasket there. If its just bolted up metal to metal u would get rattling at certain rpm. I had this issue as well. Worth a try

**NightKids** · 07-03-2011 11:38 AM

Originally Posted by thaizeg

From where ur headers bolt up to the cat... Check if there is a gasket there. If its just bolted up metal to metal u would get rattling at certain rpm. I had this issue as well. Worth a try

I was supplied with a race pipe thingy from my header to cat? This seems to be bolted metal to metal.

I also have a metal flexi joint somewhere around there too...

**androoz** · 07-03-2011 11:53 AM

by looking at the pic and the 'race pipe' u are referring to..
on the left end there is a flange that bolts up to the cat.. u should of had a gasket of some sort between that and the flange on the cat side.. could be a thin one but u should be able to see it kinda when u look in between the flanges. or may be look towards the other end of that pipe where there are nut and bolts holding it to the header collector.. they may be loose and causing the rattling sound..
when u had the car jacked up at the exhaust shop did they rev the car while u were under it? just hitting and shaking the exhaust wont replicate the vibrations when u are driving at a 2k or so rpm..

**androoz** · 07-03-2011 11:55 AM

adding on to thaizeg's post..

by looking at the pic and the 'race pipe' u are referring to..
on the left end there is a flange that bolts up to the cat.. u should of had a gasket of some sort between that and the flange on the cat side.. could be a thin one but u should be able to see it kinda when u look in between the flanges. or may be look towards the other end of that pipe where there are nut and bolts holding it to the header collector.. they may be loose and causing the rattling sound..
when u had the car jacked up at the exhaust shop did they rev the car while u were under it? just hitting and shaking the exhaust wont replicate the vibrations when u are driving at a 2k or so rpm..

**NightKids** · 07-03-2011 02:03 PM

I don't think he put a flange there so to speak but we did find that one bolt was loose. He tightened that and said confidently that it was the problem and told me to drive away but it didn't help one bit.

The noise is quite loud which I didn't think one loose bolt is capable of

**thaizeg** · 07-03-2011 03:28 PM

There should be a donut gasket on the flange side to the cat. Androoz has one which came with the headers. He has the rmf narrow style headers as well. Back then when i didnt have the donut gasket in i uses to get rattling sounds around 2-2.5k rpm.