car vibrating a lot - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

mcnvgget · 12-16-2019, 04:25 PM

so i have a full exhaust setup, the other day i installed a front pipe and over pipe and ever since the car vibrates kinda hard, like i hear everything inside the cabin shaking and i can see my hood shaking and i can hear my exhaust vibrating when i’m slowing down, is it normal for having a full exhaust on the car to vibrate a lot?

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JD001 · 12-16-2019, 04:37 PM

Nope, it's not normal. Changing the exhaust should only make your car louder and if you're extremely lucky give you more performance.. it should not be trying to declutter your car by shaking bits off it!!

Something obviously wrong with your installation... Go back to start..

humfrz · 12-16-2019, 05:57 PM

Like said, not normal. I suggest you take the new exhaust pieces off and reinstall the old pieces. If the vibration stops, you know what's to blame. When you put the new pieces back on, make sure nothing is touching (or even close to) the under pieces of the car.

OR, Bubba says just to rap on the new pieces with a hammer and/or pry them away from things with a crowbar till the vibration stops.

humfrz

Tcoat · 12-16-2019, 08:26 PM

Take the car to somebody that knows what the fuck they are doing and have them look at it.

Impureclient · 12-16-2019, 09:00 PM

Check the cars fenders and see if the wheels are contacting them.

MJones_RB · 12-18-2019, 01:42 PM

Loosen everything and start tightening front to back. Pipes may be rubbing against something. Check all your torque specs. Good luck!

mcnvgget · 12-18-2019, 02:21 PM

Quote:

Originally Posted by humfrz

Like said, not normal. I suggest you take the new exhaust pieces off and reinstall the old pieces. If the vibration stops, you know what's to blame. When you put the new pieces back on, make sure nothing is touching (or even close to) the under pieces of the car.

OR, Bubba says just to rap on the new pieces with a hammer and/or pry them away from things with a crowbar till the vibration stops.

humfrz

so my overpipe is touching my subframe, would you recommend trying to dent it away from it?

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JD001 · 12-18-2019, 02:35 PM

Quote:

Originally Posted by mcnvgget

so my overpipe is touching my subframe, would you recommend trying to dent it away from it?

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I don't understand why your new bits are touching the "wrong" bits. I am assuming that the new bits are from recognised manufacturers. The new bits should fit without getting technical with a mallet or blow torches.

Are the new bits the right spec for your poor car?

extrashaky · 12-18-2019, 02:43 PM

One of the hangers is probably out of spec and pulling it away from where it should be. Find the offending hanger and bend it where it should be.

humfrz · 12-18-2019, 10:04 PM

Quote:

Originally Posted by mcnvgget

so my overpipe is touching my subframe, would you recommend trying to dent it away from it?

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Well, if it were my car, I'd just take a crowbar and pry it away from the frame till it didn't touch anymore (if that leaves a dent, so be it, it won't make any measurable difference in performance), then take a piece of baling wire and wire it away from the frame.

OR, I would take it up to the fellows at my local auto shop and mention what is going on and what I suspect is causing it and ask them to "fix" it, while I have a cup of coffee, smoke a cigarette and read a car magazine.

Reminds me of a back in the day story about when I bought a brand new 1970 MGB-GT. Under acceleration, a harsh rattle would come from the transmission tunnel. I took it back to the dealer. About 20 minutes later they told me it was fixed. I ask them how the fixed it. This Bubba type said he took a crowbar and put a dent in the transmission tunnel housing so the transmission wouldn't hit it when it torqued over. It never made a sound after that -

humfrz

weederr33 · 12-18-2019, 11:14 PM

Idk what exhaust you have, but I want it now!

Kiske · 12-19-2019, 01:27 AM

Loosen all exhaust components, insert a pry bar/wedge between the subframe and the overpipe/downpipe and hold it. Now tighten all exhaust components. They should now bolt back up with the margin needed to not hit the frame causing the rattling and vibrations.

ROFL it's Waffle · 12-19-2019, 10:55 AM

So there's no exhaust leak?

No name brand on the exhaust?

Did you weld the parts yourself?

Maybe you installed the muffler in the collector location and the collector in the muffler location?

No additional information that could possibly aid in good resolutions and prevent us from coming up with nonsense remarks?

Tcoat · 12-19-2019, 11:35 AM

Quote:

Originally Posted by ROFL it's Waffle

So there's no exhaust leak?

No name brand on the exhaust?

Did you weld the parts yourself?

Maybe you installed the muffler in the collector location and the collector in the muffler location?

No additional information that could possibly aid in good resolutions and prevent us from coming up with nonsense remarks?

12-16-2019, 04:25 PM	#1
mcnvgget Member Join Date: Dec 2018 Drives: 2018 Toyota 86 Location: Los Angeles Posts: 41 Thanks: 12 Thanked 8 Times in 4 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	car vibrating a lot so i have a full exhaust setup, the other day i installed a front pipe and over pipe and ever since the car vibrates kinda hard, like i hear everything inside the cabin shaking and i can see my hood shaking and i can hear my exhaust vibrating when i’m slowing down, is it normal for having a full exhaust on the car to vibrate a lot? Sent from my iPhone using Tapatalk

12-16-2019, 08:26 PM	#4
Tcoat Senior Member Join Date: Jul 2014 Drives: 2020 Hakone Location: London, Ont Posts: 69,845 Thanks: 61,656 Thanked 108,283 Times in 46,456 Posts Mentioned: 2495 Post(s) Tagged: 50 Thread(s)	Take the car to somebody that knows what the fuck they are doing and have them look at it. __________________ Racecar spelled backwards is Racecar, because Racecar.

12-18-2019, 11:14 PM	#11
weederr33 Airborne at your service Join Date: Sep 2014 Drives: '17 BRZ Series.Yellow Location: El Paso, Texas Posts: 6,325 Thanks: 4,528 Thanked 5,586 Times in 2,928 Posts Mentioned: 33 Post(s) Tagged: 2 Thread(s)	Idk what exhaust you have, but I want it now! __________________ Series.Yellowbird - http://www.ft86club.com/forums/showthread.php?t=122135 MS, CSCS, TSAC-F, CPT

12-19-2019, 01:27 AM	#12
Kiske Senior Member Join Date: Jun 2013 Drives: RX-7 / BRZ Location: USA Posts: 2,343 Thanks: 1,026 Thanked 2,501 Times in 1,081 Posts Mentioned: 27 Post(s) Tagged: 0 Thread(s)	Loosen all exhaust components, insert a pry bar/wedge between the subframe and the overpipe/downpipe and hold it. Now tighten all exhaust components. They should now bolt back up with the margin needed to not hit the frame causing the rattling and vibrations. __________________ //2013 World Rally Blue BRZ Limited FBM Turbo--gone //2018 Crystal White Pearl BRZ Ts 2.2l Harrop Supercharged

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12-16-2019, 04:37 PM	#2
JD001 Senior Member Join Date: Apr 2015 Drives: Subaru BRZ Location: UK Posts: 6,027 Thanks: 7,651 Thanked 6,183 Times in 3,472 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	Nope, it's not normal. Changing the exhaust should only make your car louder and if you're extremely lucky give you more performance.. it should not be trying to declutter your car by shaking bits off it!! Something obviously wrong with your installation... Go back to start..

12-16-2019, 05:57 PM	#3
humfrz Senior Member Join Date: May 2013 Drives: 2013 FR-S, white, MT Location: Puyallup, WA Posts: 29,866 Thanks: 28,787 Thanked 31,813 Times in 16,424 Posts Mentioned: 708 Post(s) Tagged: 2 Thread(s)	Like said, not normal. I suggest you take the new exhaust pieces off and reinstall the old pieces. If the vibration stops, you know what's to blame. When you put the new pieces back on, make sure nothing is touching (or even close to) the under pieces of the car. OR, Bubba says just to rap on the new pieces with a hammer and/or pry them away from things with a crowbar till the vibration stops. humfrz

12-16-2019, 09:00 PM	#5
Impureclient Banned Join Date: May 2015 Drives: 2015 FR-S Location: NPR, Florida Posts: 2,404 Thanks: 1,802 Thanked 2,903 Times in 1,282 Posts Mentioned: 25 Post(s) Tagged: 2 Thread(s)	Check the cars fenders and see if the wheels are contacting them.

12-18-2019, 02:43 PM	#9
extrashaky Senior Member Join Date: Mar 2014 Drives: 2014 BRZ Limited Location: USA Posts: 4,045 Thanks: 1,100 Thanked 5,618 Times in 2,266 Posts Mentioned: 55 Post(s) Tagged: 1 Thread(s)	One of the hangers is probably out of spec and pulling it away from where it should be. Find the offending hanger and bend it where it should be.

12-19-2019, 10:55 AM	#13
ROFL it's Waffle The guy w/o an FRS or BRZ Join Date: Sep 2019 Drives: '23 GR86 Premium 6MT Halo White Location: Planet Erf Posts: 446 Thanks: 276 Thanked 399 Times in 215 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	So there's no exhaust leak? No name brand on the exhaust? Did you weld the parts yourself? Maybe you installed the muffler in the collector location and the collector in the muffler location? No additional information that could possibly aid in good resolutions and prevent us from coming up with nonsense remarks?

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