Weird clunking noise!

pseftis · 12-14-2012, 12:24 PM

So i took my car for a drive this morning and when i let my foot off the gas from 3000rpm down there was a loud grinding noise coming from underneath my seat.. hfc or exhaust?!?
sound went away after a few min of driving.. still tripped me out though!

Just put on a berk hfc and ark exhaust last week.. not sure if this sound is normal till it heats up

pseftis · 12-14-2012, 02:24 PM

??? guess im the only one with this issue! FML

Pelican170 · 12-14-2012, 02:31 PM

Hmmnn, thats weird. Its a grinding noise? i dont see how a grinding sound could be from an exhaust issue. Hard to tell, hopefully you figure it out sooner than later... any other out of the normal things happening?

pseftis · 12-14-2012, 02:42 PM

Quote:

Originally Posted by Pelican170

Hmmnn, thats weird. Its a grinding noise? i dont see how a grinding sound could be from an exhaust issue. Hard to tell, hopefully you figure it out sooner than later... any other out of the normal things happening?

nope.. went away after driving for a few min though.. going to drive it later and see if it makes the noise again

SouthArk370Z · 12-14-2012, 03:16 PM

It could be the exhaust system bumping the frame or other part of the car. Maybe happening fast enough that it sounds like a grind.

Joelito · 12-14-2012, 07:13 PM

Could be your exhaust rattling when coming into contact with the crossbar underneath which is common with most exhaust systems as they are low. A few washers added underneath the exhaust where it meets the crossbar will fix this issue. Check if its that

Jack370Z · 12-15-2012, 08:15 PM

If it doesn't do it when you take it out again...maybe it was a small dead limb you picked up during the earlier drive. They can make some strange sounds and are easily picked up. Just a thought.

CDepp · 12-15-2012, 09:08 PM

Quote:

Originally Posted by Jack370Z

If it doesn't do it when you take it out again...maybe it was a small dead limb you picked up during the earlier drive. They can make some strange sounds and are easily picked up. Just a thought.

That's where my train of thoughts were going. If it wasn't repeatable immediately, debris in your wheel well could reverberate to under your seat if a branch or coat hanger (had that for 2 days on my slammed Integra - until I could get it to our air lifts).

Hopefully everything's okay.

kbalza · 11-13-2014, 12:52 PM

Did you ever figure out what the noise was? I am experiencing the same thing.

maizenblue · 11-13-2014, 09:16 PM

I had the problem as well. My exhaust was banging against the rear sway bar I believe. I couldnt get the washer method to work so I just wrapped the part of the exhaust that hit the bar with exhaust wrap and the noise disappeared

12-14-2012, 12:24 PM	#1 (permalink)
pseftis Base Member Join Date: Apr 2012 Location: Toronto Posts: 156 Drives: 10 Nissan 370z M6 Rep Power: 13	Weird clunking noise! So i took my car for a drive this morning and when i let my foot off the gas from 3000rpm down there was a loud grinding noise coming from underneath my seat.. hfc or exhaust?!? sound went away after a few min of driving.. still tripped me out though! Just put on a berk hfc and ark exhaust last week.. not sure if this sound is normal till it heats up

12-14-2012, 02:31 PM	#3 (permalink)
Pelican170 Track Member Join Date: Jul 2010 Location: Sandy Hook, CT Posts: 972 Drives: Nissan 370z Nismo Rep Power: 15	Hmmnn, thats weird. Its a grinding noise? i dont see how a grinding sound could be from an exhaust issue. Hard to tell, hopefully you figure it out sooner than later... any other out of the normal things happening? __________________ Fast Intentions CF Exhaust - Fast Intentions HFC's - HPS Tubes w/ AFE Dry Flow Filter's

12-14-2012, 03:16 PM	#5 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324197	It could be the exhaust system bumping the frame or other part of the car. Maybe happening fast enough that it sounds like a grind. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

12-14-2012, 07:13 PM	#6 (permalink)
Joelito Base Member Join Date: Apr 2012 Location: Queens Posts: 120 Drives: 12 370z 6sp Rep Power: 13	Could be your exhaust rattling when coming into contact with the crossbar underneath which is common with most exhaust systems as they are low. A few washers added underneath the exhaust where it meets the crossbar will fix this issue. Check if its that DEpointfive0 likes this.

12-15-2012, 08:15 PM	#7 (permalink)
Jack370Z Base Member Join Date: Oct 2009 Location: South Carolina Posts: 128 Drives: 09 370Z Plat SP 6MT Rep Power: 15	If it doesn't do it when you take it out again...maybe it was a small dead limb you picked up during the earlier drive. They can make some strange sounds and are easily picked up. Just a thought. __________________ Jack 09 370Z

12-14-2012, 02:24 PM	#2 (permalink)
pseftis Base Member Join Date: Apr 2012 Location: Toronto Posts: 156 Drives: 10 Nissan 370z M6 Rep Power: 13	??? guess im the only one with this issue! FML

11-13-2014, 12:52 PM	#9 (permalink)
kbalza Base Member Join Date: Jun 2013 Location: Oregon Posts: 11 Drives: 2013 370z PG 7AT Rep Power: 11	Did you ever figure out what the noise was? I am experiencing the same thing.

11-13-2014, 09:16 PM	#10 (permalink)
maizenblue Enthusiast Member Join Date: Sep 2013 Location: Denver Posts: 288 Drives: 2010 370Z Rep Power: 11	I had the problem as well. My exhaust was banging against the rear sway bar I believe. I couldnt get the washer method to work so I just wrapped the part of the exhaust that hit the bar with exhaust wrap and the noise disappeared

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