Revisiting the exhaust rattle **VIDEO&PICS** - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

s14unimog · 08-22-2008, 09:37 AM

So what do you guys think? I called Blitz and they are clueless to what it could be. Alittle background on the system.

CS polly hangers
3" down pipe
3" test pipe
80mm Nur Spec R catback
(the resonator was cut out and removed b/c I kept dragging it across the ground. I got my hands on another 80mm blitz system and removed a straight section long enough to replace the resonator.)

The rattle has been in the system since before the resonator was removed. The hopes were that removing the resonator would fix the leak and rattle together, apparently it only fixed the leak.

http://www.youtube.com/watch?v=JDYOGBzjiUs

undesiredshoe · 08-22-2008, 09:39 AM

Have you checked the heat shields?

WoolyS14DET · 08-22-2008, 09:57 AM

Also may sound like one or a baffle has come loose in the muffler ?? check that and also check the heat shields like undesiredshoe said !!
You may also want to try using a rubber hammer and tap on the exhaust with the car off and see if you can isolate the rattle !!! Good luck !!

s14unimog · 08-22-2008, 09:57 AM

all are removed except the one around the gas tank. You have to drop the sub frame to remove it.

Has anyone had any experience with that particular shield rattling?

I actually called Blitz NA about it to discuss the construction of the NUR Spec with hopes of locating the baffles before I cut my can apart. they claim there are not any internal baffles and that the canister only houses the packing material.

I might just cut that piece open and see for myself, this noise is horrible!!!!

GSXRJJordan · 08-22-2008, 10:14 AM

Get under the car and shake all parts of the exhaust as hard as you can. If it moves, you need more hangers/better placement. You should be able to reproduce the sound.

It's very unlikely that it's the muffler baffles, because as they said, there usually aren't traditional baffles (just mesh and packing).

s14unimog · 08-22-2008, 11:47 AM

yeah on top of having polly hangers I've also got nismo motor/tranny mounts so I couldn't imagine anything moving much. I've felt the system while I was doing the welding and you can just about kick the tip and have no movement.

I'm going to grab a dead blow when I get home and knock on the canister a bit.

lok · 08-22-2008, 11:53 AM

it is prob the two bolts that hold the rear hangers to the frame.

drop the canister and tighten up the two bolts that hangers are held on to the chassis.

08-22-2008, 09:37 AM	#1
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 34 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	Revisiting the exhaust rattle VIDEO&PICS So what do you guys think? I called Blitz and they are clueless to what it could be. Alittle background on the system. CS polly hangers 3" down pipe 3" test pipe 80mm Nur Spec R catback (the resonator was cut out and removed b/c I kept dragging it across the ground. I got my hands on another 80mm blitz system and removed a straight section long enough to replace the resonator.) The rattle has been in the system since before the resonator was removed. The hopes were that removing the resonator would fix the leak and rattle together, apparently it only fixed the leak. http://www.youtube.com/watch?v=JDYOGBzjiUs __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

08-22-2008, 09:57 AM	#4
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 34 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	all are removed except the one around the gas tank. You have to drop the sub frame to remove it. Has anyone had any experience with that particular shield rattling? I actually called Blitz NA about it to discuss the construction of the NUR Spec with hopes of locating the baffles before I cut my can apart. they claim there are not any internal baffles and that the canister only houses the packing material. I might just cut that piece open and see for myself, this noise is horrible!!!! __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

08-22-2008, 10:14 AM	#5
GSXRJJordan Post Whore! Join Date: May 2006 Location: << 626 >> Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Get under the car and shake all parts of the exhaust as hard as you can. If it moves, you need more hangers/better placement. You should be able to reproduce the sound. It's very unlikely that it's the muffler baffles, because as they said, there usually aren't traditional baffles (just mesh and packing). __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

08-22-2008, 11:47 AM	#6
s14unimog Nissanaholic! Join Date: Dec 2003 Location: In a place, near a river, over a lake Age: 34 Posts: 2,415 Trader Rating: (22) Rides Gallery: s14unimog Feedback Score: 22 reviews	yeah on top of having polly hangers I've also got nismo motor/tranny mounts so I couldn't imagine anything moving much. I've felt the system while I was doing the welding and you can just about kick the tip and have no movement. I'm going to grab a dead blow when I get home and knock on the canister a bit. __________________ Fuking ginger bread man stole my wallet... SHIFT*lock_slide to side d3m3rs0n: if i have a baby im naming it Brandons Fault Emerson

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08-22-2008, 09:39 AM	#2
undesiredshoe Zilvia Addict Join Date: Sep 2005 Location: Wisco Age: 32 Posts: 787 Trader Rating: (2) Feedback Score: 2 reviews	Have you checked the heat shields?

08-22-2008, 09:57 AM	#3
WoolyS14DET Zilvia FREAK! Join Date: Mar 2008 Location: Long Island, NY Age: 42 Posts: 1,310 Trader Rating: (18) Feedback Score: 18 reviews	Also may sound like one or a baffle has come loose in the muffler ?? check that and also check the heat shields like undesiredshoe said !! You may also want to try using a rubber hammer and tap on the exhaust with the car off and see if you can isolate the rattle !!! Good luck !!

08-22-2008, 11:53 AM	#7
lok Zilvia Addict Join Date: Jul 2003 Location: Oklahoma Posts: 790 Trader Rating: (10) Feedback Score: 10 reviews	it is prob the two bolts that hold the rear hangers to the frame. drop the canister and tighten up the two bolts that hangers are held on to the chassis.