Exhaust Rattling :/

[baagel]

I have an APEXi catback, and on cold start I get a slight rattle from the valve. This catback uses its own type of spring/clip that mates with the actuator, the end on the exhaust side is welded, so it is not removeable. I tried stretching out the spring a little bit to try and provide more spring force with the actuator attached, and it actually did fix it for a day or two, but now it's back again. I'm trying to think of a way to compress the spring instead for that extra force..

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[theguysmiley]

I have an APEXi catback, and on cold start I get a slight rattle from the valve. This catback uses its own type of spring/clip that mates with the actuator, the end on the exhaust side is welded, so it is not removeable. I tried stretching out the spring a little bit to try and provide more spring force with the actuator attached, and it actually did fix it for a day or two, but now it's back again. I'm trying to think of a way to compress the spring instead for that extra force..

I have the APEXi resonated, and I also have the rattling valve issue. It's quite annoying. I eventually installed the valve in the open position, and just let it hold the valve open all the time, until I can figure something else out.

 

[baagel]

I have the APEXi resonated, and I also have the rattling valve issue. It's quite annoying. I eventually installed the valve in the open position, and just let it hold the valve open all the time, until I can figure something else out.

It's a bummer since I specifically wanted to have the valve option for quieter moments. Though, I tried playing with the clip again and it's been over a week now with decent results.

I used light force to bend the clip counter-clockwise (toward the closed position). Then I wrapped a couple layers of electrical tape on the end that mates with the actuator to give it a little more thickness. Also made sure to hand tighten the three bolts with a good amount torque without overdoing it.

Now, I hear a little rattling on cold start when the engine starts at ~1300 RPM. Then when it goes down to 1000 RPM, I can't hear any rattling unless I literally stick my ear next to the valve, and even then it's very slight. Once idle drops completely there's no rattling. And when it's warmed up a bit more, I can't say I hear any rattling at low RPMs with valve closed.

 

[Andrew__a90]

I know this thread is old but I recently started hearing this once I installed my AA Catted Downpipe, didn’t have it when it was just the AWE Track Exhaust. I did have interior rattles but eliminated all of them with some “ingenuity” but this rattle that you all have is new and it only happens on cold start. It goes away after it idles down to 1k rpm and I hear it when I’m stopped at a light once in a blue moon. I saw some people talking about a spacer but I’m not sure which one I should get or what the real issue is. At the same time it’s not really a huge issue since it only does it for the first 10 seconds I start my car lol.

 

[baagel]

I should also update on my previous posts. The rattling came back and I just gave up it doesn't seem as bad as it was initially. Maybe because I just got used to it.

 

[Timmy_Jones]

I know this thread is old but I recently started hearing this once I installed my AA Catted Downpipe, didn’t have it when it was just the AWE Track Exhaust. I did have interior rattles but eliminated all of them with some “ingenuity” but this rattle that you all have is new and it only happens on cold start. It goes away after it idles down to 1k rpm and I hear it when I’m stopped at a light once in a blue moon. I saw some people talking about a spacer but I’m not sure which one I should get or what the real issue is. At the same time it’s not really a huge issue since it only does it for the first 10 seconds I start my car lol.

Your awe exhaust doesn’t have a valve…..

 

[skyviper80]

I know this thread is old but I recently started hearing this once I installed my AA Catted Downpipe, didn’t have it when it was just the AWE Track Exhaust. I did have interior rattles but eliminated all of them with some “ingenuity” but this rattle that you all have is new and it only happens on cold start. It goes away after it idles down to 1k rpm and I hear it when I’m stopped at a light once in a blue moon. I saw some people talking about a spacer but I’m not sure which one I should get or what the real issue is. At the same time it’s not really a huge issue since it only does it for the first 10 seconds I start my car lol.

Turn off Cold Start Heating, it eliminated the startup rattles when I installed BoostLogic DP.

 

[Andrew__a90]

Turn off Cold Start Heating, it eliminated the startup rattles when I installed BoostLogic DP.

How do I do this?

 

[Andrew__a90]

Your awe exhaust doesn’t have a valve…..

Your awe exhaust doesn’t have a valve…..

I’m well aware, that’s why I never mentioned the valves. Other AWE track exhaust owners expressed the same concerns about the rattle

 

[skyviper80]

How do I do this?

It's an option in the bootmod3 OTS tunes.

 

[Andrew__a90]

It's an option in the bootmod3 OTS tunes.

Oh ok gotcha, thanks for the reply!

 

[Andrew__a90]

When I had stock exhaust I would get a little rattle on cold start, and when I did my AWE and downpipe the midpipe was resting on the brace, I had to put a spacer, and now it is better, but now because the exhaust is deep and loud, I have rattles from the interior and in the trunk area, oh well, that's what happen when you modify a car.

Hey man, I got your EXACT same setup and was wondering exactly what spacer you used to fix this issue. Once I installed the Downpipe I started hearing a rattle when I cold started the car and while it only last for a couple of seconds I’d rather it not rattle at all. Thanks in advance.

 

[ATrn]

Anyone have a solution? I recently purchased a used 2020 that had a Kenji downpipe that was removed when I purchased it. I have the same rattle that seems like it comes from the right exhaust tip on cold start and goes away after 10 seconds.

 

[vitamink]

I have the same rattle when engine/exhaust are cold, with newly installed AWE touring and AA downpipe. Made adjustments to make sure it’s not contacting the cross brace. It doesn’t seem to be contacting heat shield but not 100% sure. A friend told me pushing the heat shield up helped his.

 

[Bug2th]

I had a couple banging type noises (no tingy/rattley type noises) after installing the Dinan exhaust and AA dp. Had one clamp in the back I had to turn around as the bolt was about a 1/4” from the insulation and banged once in a while. Another clamp in the middle was a bit too large so when tightened all the way to was still a bit loose so added a thin piece of steel all the way around the pipe and then it clamped properly and that took care of it. I daily it but for track days I double check all the clamps and so far so good.

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