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New Exhaust "DING"

3 weeks ago I had the Nismo R-Tune exhaust installed, and I know that metal expands when hot; however, there is a loud "ding" that happens about every 15-20 seconds

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Old 08-11-2018, 04:13 AM   #1 (permalink)
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Default New Exhaust "DING"

3 weeks ago I had the Nismo R-Tune exhaust installed, and I know that metal expands when hot; however, there is a loud "ding" that happens about every 15-20 seconds after the exhaust is hot. The ding can only be heard while at idle or when stopped, not while driving.

I'm just wondering if other aftermarket CBE units do the same thing, and also if the noise eventually goes away or just fades to a not-as-noticeable level after the system is more seasoned.

I've had the exhaust inspected by the shop that did the install and everything is copacetic, but it's a tad annoying when your car sounds like a ticking bomb in the parking lot of Lowe's.
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Old 08-11-2018, 04:29 AM   #2 (permalink)
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Can't say that mine makes any noises other than once the car is shut off and the metal starts to cool back down.
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Old 08-11-2018, 05:52 AM   #3 (permalink)
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Originally Posted by NorthStyle View Post
Can't say that mine makes any noises other than once the car is shut off and the metal starts to cool back down.
Yeah, I don't get the normal little cooling off ticks... just the loud ding for several minutes.
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Old 08-11-2018, 07:44 AM   #4 (permalink)
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Is it making the same ding when cooling down? If so, I'd start snugging up flange bolts, clamps, etc.
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Old 08-11-2018, 11:33 AM   #5 (permalink)
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Originally Posted by SouthArk370Z View Post
Is it making the same ding when cooling down? If so, I'd start snugging up flange bolts, clamps, etc.
It is making the same sound on cool down. All bolts/hardware/gaskets are good--thank you for the suggestion.

I listened to it for several minutes when I got home today and it sounds like something in one of the muffler cans. I called the shop that installed it and they're going to look at it Monday morning. I'll report back with the findings.
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