Cold start rattle after header,op,fp installed by a newb - Toyota GR86, 86, FR-S and Subaru BRZ Forum & Owners Community

aristo · 10-26-2014, 05:51 PM

Couldn't think of a proper thread to ask but just looking for a quick answer from the experts --

I installed the OFH, Motiv OP and Berk catted FP yesterday and upon starting up the car made a sound sort of like something was rattling?

Actually driving it after the cold start warm up doesn't seem to have any strange noises, both high rev and low

Would appreciate if anyone gave it a listen and chime in if it's 'normal' or within expected range or not. Catback is stock*

I'm also worried about mini exhaust leaks due to my first time installing this sort of thing but will save the check up for next weekend

Here is a video of the start up(lower volume a little it can be loud): for reference, iPhone used to record and was sitting on ground approximately 3 feet away from exhaust tips
[ame="https://www.youtube.com/watch?v=1Bp146e2HrM"]FR-S BRZ GT86 Open Flash Header + Motiv Overpipe + Berk HFC Frontpipe + Stock Catback - YouTube[/ame]

I found another video of someone with the Borla UEL (stock exhaust) cold start for comparison:
[ame="https://www.youtube.com/watch?v=7ZM5d_7c5Xo"]Borla UEL headers with stock exhaust - YouTube[/ame]

cdrazic93 · 10-26-2014, 06:02 PM

Sounds like rasp, but you shouldn't with a catted FP...

jflogerzi · 10-27-2014, 12:13 PM

Was there clearance with the op and sub frame?

Foobar · 10-27-2014, 12:29 PM

Sounds like something's hitting something. Check clearances - there's not a lot of room I've noticed.

aristo · 10-27-2014, 02:27 PM

There is very little clearance between the subframe / swaybar and OP --- maybe a little less than half centimeter -- but when Installing everything I wiggled it around and there didn't seem to be a way to get any more clearance

I guess I am just going to jack the car up again and run under it to see if anything is shaking at start lol

jdubious · 10-28-2014, 08:28 AM

It could be the cat if its damaged, or defective. I would try to get up under there when its cold and tap on the exhaust with a rubber mallet or something to try to duplicate the noise.

10-26-2014, 05:51 PM	#1
aristo Senior Member Join Date: Apr 2014 Drives: BRZ SWP 14 Location: EST Posts: 108 Thanks: 122 Thanked 44 Times in 17 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	Cold start rattle after header,op,fp installed by a newb Couldn't think of a proper thread to ask but just looking for a quick answer from the experts -- I installed the OFH, Motiv OP and Berk catted FP yesterday and upon starting up the car made a sound sort of like something was rattling? Actually driving it after the cold start warm up doesn't seem to have any strange noises, both high rev and low Would appreciate if anyone gave it a listen and chime in if it's 'normal' or within expected range or not. Catback is stock* I'm also worried about mini exhaust leaks due to my first time installing this sort of thing but will save the check up for next weekend Here is a video of the start up(lower volume a little it can be loud): for reference, iPhone used to record and was sitting on ground approximately 3 feet away from exhaust tips [ame="https://www.youtube.com/watch?v=1Bp146e2HrM"]FR-S BRZ GT86 Open Flash Header + Motiv Overpipe + Berk HFC Frontpipe + Stock Catback - YouTube[/ame] I found another video of someone with the Borla UEL (stock exhaust) cold start for comparison: [ame="https://www.youtube.com/watch?v=7ZM5d_7c5Xo"]Borla UEL headers with stock exhaust - YouTube[/ame]

10-26-2014, 06:02 PM	#2
cdrazic93 Junior Join Date: Aug 2013 Drives: a car Location: Probably at school Posts: 4,341 Thanks: 3,184 Thanked 2,512 Times in 1,502 Posts Mentioned: 20 Post(s) Tagged: 0 Thread(s)	Sounds like rasp, but you shouldn't with a catted FP... __________________ "Ah! What music! They could have never imagined, those pioneers who invented the automobile, that it would posses us like this, our imaginations, our dreams. Men love women, but even more than that, men love CARS!"-Lord Hesketh

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10-27-2014, 02:27 PM	#5
aristo Senior Member Join Date: Apr 2014 Drives: BRZ SWP 14 Location: EST Posts: 108 Thanks: 122 Thanked 44 Times in 17 Posts Mentioned: 1 Post(s) Tagged: 0 Thread(s)	There is very little clearance between the subframe / swaybar and OP --- maybe a little less than half centimeter -- but when Installing everything I wiggled it around and there didn't seem to be a way to get any more clearance I guess I am just going to jack the car up again and run under it to see if anything is shaking at start lol

10-28-2014, 08:28 AM	#6
jdubious Member Join Date: May 2013 Drives: 13 Scion FR-S Location: Texas Posts: 89 Thanks: 44 Thanked 20 Times in 19 Posts Mentioned: 0 Post(s) Tagged: 0 Thread(s)	It could be the cat if its damaged, or defective. I would try to get up under there when its cold and tap on the exhaust with a rubber mallet or something to try to duplicate the noise.

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