How to stop exhaust rattles? - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

IAmNotTheDriftKing · 09-25-2013, 11:40 PM

So I was wondering if anyone has this problem? It is with any aftermarket exhaust(I have the Perrin catback). Once in a while I hear a slight tinging sound coming from the rear of the car, which sounds like the exhaust is hitting something. What would be the best plan of action? I know it isn't some of the rattles this car has because these came up after I installed the exhaust.

eddieEndo · 09-25-2013, 11:49 PM

Quote:

Originally Posted by IAmNotTheDriftKing

So I was wondering if anyone has this problem? It is with any aftermarket exhaust(I have the Perrin catback). Once in a while I hear a slight tinging sound coming from the rear of the car, which sounds like the exhaust is hitting something. What would be the best plan of action? I know it isn't some of the rattles this car has because these came up after I installed the exhaust.

I had the issue with my greddy evo3 but after a week or two it just went away

11RApearl · 09-25-2013, 11:51 PM

You should check to make sure there is clearance between the exhaust and undercarriage. If thats clear check both of the clamps while the car is on. Listen closely. I was working on mine and found that my stepdad didnt tighten the axel-back clamp at all at it rattled badly. Jack-up your car and inspect it preferably while its running. Also if you have a helping hand have them rev the car up with their hand on the gas peddle check each point of the clamp connections.

IAmNotTheDriftKing · 09-26-2013, 01:06 AM

Quote:

Originally Posted by eddieEndo

I had the issue with my greddy evo3 but after a week or two it just went away

I have had mine on for about a 3 or so weeks, still rattles a bit. I am probably going to check all the screws again just to make sure everything is alright.

nix · 09-26-2013, 01:13 AM

The Perrin catback needs some real effort to align it properly.

To check for knocks, just climb under the car and use force to swing the whole exhaust around in every direction and see if you can get it to smash into something.

On my BRZ I had to stack 2 rubber hanger bushes on the 5th hanger point (not the 4 muffler ones) to get a bit more sub frame clearance.

I also really started to get sick of the Perrin hanger clips slipping so replaced them with ye olde hose clamps. GL!

mrk1 · 09-26-2013, 09:22 AM

Any time you put a larger pipe in the factory space its bound to have clearance issues. Go to a good hardware store and look for shaft collars in the size to fit your hanger rod. You may need to two piece style if your hanger rods have a flare at the end.

Just set the collars to apply pressure to the rubber hangers in the direction you need, and spending the extra money for the stainless ones is worth it.

ARK Performance · 09-26-2013, 11:34 AM

What type of ting is it, does it sound more like its hitting under the car or does it sound muffled? Like everyone else said make sure your clearance is good, push up on the exhaust when its all bolted up to see if you'll get near anything. Also another thing is trying shaking the muffler itself and seeing if theres any sound coming from there

scarfo · 09-26-2013, 06:52 PM

I get it aswell on my greedy evo 3, when driving at low rpms in first or second. I haven't really had time to inspect under the car to see if it's touching somewhere, but sounds like its vibrating against plastic

zoomzoomers · 09-26-2013, 07:04 PM

Do you have an AT? If so, the vibration is a known issue. You should contact the guys at Perrin. They sent me a new mid pipe with no flex joint and that seems to have solved most of the virbration.

11RApearl · 09-27-2013, 01:05 AM

Even if its not touching while your below the car when its OFF, Make sure you have enough clearance for heat expansion as well. Best advice i can give is to take your time and align everything with optimal results. i.e. enough clearance and everything tight. Even with it running and after youve taken it around the block to see the difference between cold and hot exhaust. This process may be a little demanding but if it stops the rattles its worth it!

FR-Sizzle · 09-27-2013, 04:40 AM

Quote:

Originally Posted by IAmNotTheDriftKing

So I was wondering if anyone has this problem? It is with any aftermarket exhaust(I have the Perrin catback). Once in a while I hear a slight tinging sound coming from the rear of the car, which sounds like the exhaust is hitting something. What would be the best plan of action? I know it isn't some of the rattles this car has because these came up after I installed the exhaust.

Your exhaust is probably hitting something when it rattles. This has been reported with a lot of people who own the Perrin CBE with the resonator. There was a thread made with a big discussion on it. Search the forums for the thread.

IAmNotTheDriftKing · 09-27-2013, 06:10 PM

Quote:

Originally Posted by zoomzoomers

Do you have an AT? If so, the vibration is a known issue. You should contact the guys at Perrin. They sent me a new mid pipe with no flex joint and that seems to have solved most of the virbration.

No it is a manual, it doesn't seem to be coming from the middle of the car but rather the rear of the car.

IAmNotTheDriftKing · 09-27-2013, 06:11 PM

Thanks a lot guys, I pretty sure I know what it is. There is about 1/2 an inch clearance, so I am going to go back home and readjust everything.

zoomzoomers · 09-27-2013, 06:17 PM

Yeah, the rattling happens at the tips from what I recall and it's weird as it always seemed the entire system seemed to shake as one solid piece.

09-25-2013, 11:40 PM	#1
IAmNotTheDriftKing Senior Member Join Date: Feb 2013 Drives: I own an FR-S. . . whatelse! Location: Northwest Indiana Posts: 318 Thanks: 114 Thanked 140 Times in 84 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	How to stop exhaust rattles? So I was wondering if anyone has this problem? It is with any aftermarket exhaust(I have the Perrin catback). Once in a while I hear a slight tinging sound coming from the rear of the car, which sounds like the exhaust is hitting something. What would be the best plan of action? I know it isn't some of the rattles this car has because these came up after I installed the exhaust.

09-26-2013, 09:22 AM	#6
mrk1 Senior Member Join Date: Mar 2013 Drives: Sterling BRZ Ltd Location: New England Posts: 1,702 Thanks: 403 Thanked 1,389 Times in 671 Posts Mentioned: 20 Post(s) Tagged: 2 Thread(s)	Any time you put a larger pipe in the factory space its bound to have clearance issues. Go to a good hardware store and look for shaft collars in the size to fit your hanger rod. You may need to two piece style if your hanger rods have a flare at the end. Just set the collars to apply pressure to the rubber hangers in the direction you need, and spending the extra money for the stainless ones is worth it. __________________ The Build Thread GT28RS - eBoost2 - 3.91 Final Drive - Supra LSD

09-26-2013, 07:04 PM	#9
zoomzoomers Senior Member Join Date: Nov 2011 Drives: 2013 Subaru SWP BRZ Limited 6AT Location: Darkside Posts: 1,862 Thanks: 526 Thanked 305 Times in 207 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Do you have an AT? If so, the vibration is a known issue. You should contact the guys at Perrin. They sent me a new mid pipe with no flex joint and that seems to have solved most of the virbration. __________________ Man Law#17:A man in the company of a hot, seductively dressed, woman MUST remain sober enough to fight! MODS: AVO tubes + filter, Cusco (F) strut brace w/ MC brace, Perrin CBE, Subaru OEM trunk tray, Grimmspeed front license re-locator & hood struts and Beatsonic rear cam.

09-27-2013, 06:17 PM	#14
zoomzoomers Senior Member Join Date: Nov 2011 Drives: 2013 Subaru SWP BRZ Limited 6AT Location: Darkside Posts: 1,862 Thanks: 526 Thanked 305 Times in 207 Posts Mentioned: 9 Post(s) Tagged: 0 Thread(s)	Yeah, the rattling happens at the tips from what I recall and it's weird as it always seemed the entire system seemed to shake as one solid piece. __________________ Man Law#17:A man in the company of a hot, seductively dressed, woman MUST remain sober enough to fight! MODS: AVO tubes + filter, Cusco (F) strut brace w/ MC brace, Perrin CBE, Subaru OEM trunk tray, Grimmspeed front license re-locator & hood struts and Beatsonic rear cam.

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09-25-2013, 11:51 PM	#3
11RApearl Member Join Date: Jan 2013 Drives: Scion FR-S Location: TEXAS Posts: 70 Thanks: 10 Thanked 18 Times in 12 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	You should check to make sure there is clearance between the exhaust and undercarriage. If thats clear check both of the clamps while the car is on. Listen closely. I was working on mine and found that my stepdad didnt tighten the axel-back clamp at all at it rattled badly. Jack-up your car and inspect it preferably while its running. Also if you have a helping hand have them rev the car up with their hand on the gas peddle check each point of the clamp connections.

09-26-2013, 11:34 AM	#7
ARK Performance Member Join Date: Aug 2012 Drives: Subaru BRZ Location: Chino, CA Posts: 68 Thanks: 3 Thanked 35 Times in 20 Posts Mentioned: 5 Post(s) Tagged: 0 Thread(s)	What type of ting is it, does it sound more like its hitting under the car or does it sound muffled? Like everyone else said make sure your clearance is good, push up on the exhaust when its all bolted up to see if you'll get near anything. Also another thing is trying shaking the muffler itself and seeing if theres any sound coming from there

09-26-2013, 06:52 PM	#8
scarfo Senior Member Join Date: Jan 2013 Drives: gts 86 Location: australia Posts: 136 Thanks: 12 Thanked 23 Times in 17 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	I get it aswell on my greedy evo 3, when driving at low rpms in first or second. I haven't really had time to inspect under the car to see if it's touching somewhere, but sounds like its vibrating against plastic

09-27-2013, 01:05 AM	#10
11RApearl Member Join Date: Jan 2013 Drives: Scion FR-S Location: TEXAS Posts: 70 Thanks: 10 Thanked 18 Times in 12 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Even if its not touching while your below the car when its OFF, Make sure you have enough clearance for heat expansion as well. Best advice i can give is to take your time and align everything with optimal results. i.e. enough clearance and everything tight. Even with it running and after youve taken it around the block to see the difference between cold and hot exhaust. This process may be a little demanding but if it stops the rattles its worth it!

09-27-2013, 06:11 PM	#13
IAmNotTheDriftKing Senior Member Join Date: Feb 2013 Drives: I own an FR-S. . . whatelse! Location: Northwest Indiana Posts: 318 Thanks: 114 Thanked 140 Times in 84 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Thanks a lot guys, I pretty sure I know what it is. There is about 1/2 an inch clearance, so I am going to go back home and readjust everything.

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