Terrible rattling sound

Iantfox · 08-20-2022, 04:03 PM

Can anyone help me w my z, I get a very very loud rattle right around 3.5 k rpm’s every time. Sometimes at idle too. All heat shields are off the car except the header ones, car has aam test pipes and fast intentions exhaust, I’ve looked at all contact points and can not figure it out. Rattle started the day the resonated test pipes went on the car sounds like it’s coming from front passenger side but I’m not sure, anyone please help!!

SouthArk370Z · 08-22-2022, 06:22 AM

Get the car up high enough that you have some elbow room and start "beating" on stuff with a rubber hammer until something rattles. I'd check the exhaust pipes first but YMMV.

Iantfox · 08-22-2022, 08:34 AM

I have gone under there so many times this month chasing it lol, I can try and get it higher up to hit it harder, but so far I can only replicate the rattle under load or it will randomly do it at idle

BettyZ · 08-22-2022, 08:49 AM

Could be a loose bolt on one of the flanges.

stansens · 08-26-2022, 06:54 AM

If it happened right after the pipe install then my thoughts would be any and all bolts loosened during procedure. All gaskets replaced I trust as they get squashed and should not really be re-used other than in an emergency. Again like others said it is searching and banging of parts to see if noise starts. Maybe pay a muffler shop to have a quick look.

SeeThruHead · 08-26-2022, 11:23 AM

due to how resonant frequencies work it could be, literally anywhere in the car.
The rear hatch latch mechanism is a cause of common rattling.
You have to open it and fill it with grease to stop it.

08-20-2022, 04:03 PM	#1 (permalink)
Iantfox Base Member Join Date: Apr 2019 Location: Alabama Posts: 19 Drives: 2011 370z pw m6 Rep Power: 6	Terrible rattling sound Can anyone help me w my z, I get a very very loud rattle right around 3.5 k rpm’s every time. Sometimes at idle too. All heat shields are off the car except the header ones, car has aam test pipes and fast intentions exhaust, I’ve looked at all contact points and can not figure it out. Rattle started the day the resonated test pipes went on the car sounds like it’s coming from front passenger side but I’m not sure, anyone please help!!

08-22-2022, 06:22 AM	#2 (permalink)
SouthArk370Z Premium Member Join Date: Nov 2010 Location: South Arkansas Posts: 8,435 Drives: 2014 Challenger Rep Power: 324198	Get the car up high enough that you have some elbow room and start "beating" on stuff with a rubber hammer until something rattles. I'd check the exhaust pipes first but YMMV. stansens and filip00 like this. __________________ Steering Lock Links - Search The370Z Bookmarklet - FSM @ NICOclub Mankind has progressed past the need for war but we haven't evolved that far. - NachoMahma

08-22-2022, 08:49 AM	#4 (permalink)
BettyZ A True Z Fanatic Join Date: Aug 2018 Location: Chicagoland Age: 37 Posts: 5,261 Drives: A Garage Queen Rep Power: 2684371	Could be a loose bolt on one of the flanges. __________________ '14 MB Nismo \| Boost Lab 6870 1.32 AR 553 HP / 471 ft.-lbs. Betty Mods

08-26-2022, 06:54 AM	#5 (permalink)
stansens Base Member Join Date: Nov 2015 Location: toronto, canada Posts: 144 Drives: 2016, 370z Rep Power: 192	If it happened right after the pipe install then my thoughts would be any and all bolts loosened during procedure. All gaskets replaced I trust as they get squashed and should not really be re-used other than in an emergency. Again like others said it is searching and banging of parts to see if noise starts. Maybe pay a muffler shop to have a quick look. BettyZ likes this.

08-26-2022, 11:23 AM	#6 (permalink)
SeeThruHead Track Member Join Date: Jun 2020 Location: Toronto Posts: 716 Drives: Red '18 Sport Manual Rep Power: 23498	due to how resonant frequencies work it could be, literally anywhere in the car. The rear hatch latch mechanism is a cause of common rattling. You have to open it and fill it with grease to stop it. __________________ My Build thread STH Build Plan Thread Images too big fix here

08-22-2022, 08:34 AM	#3 (permalink)
Iantfox Base Member Join Date: Apr 2019 Location: Alabama Posts: 19 Drives: 2011 370z pw m6 Rep Power: 6	I have gone under there so many times this month chasing it lol, I can try and get it higher up to hit it harder, but so far I can only replicate the rattle under load or it will randomly do it at idle

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