Weird rattling sound
 

There's a rattling sound my car makes when it's cold started and goes away once it warms up but when im accelerating I can hear the rattling but its not as loud. It's a 2016 Subaru BRZ, recently did a baffle plate and oil pan replacement. Car runs fine its just the rattling is loud. I tried searching it up but no one seems to have the same problem where it would rattle at cold start, almost disappear once its warmed up and come up again when its accelerating and decelerating high rpm to mid rpm levels~


https://youtu.be/GsU_ihHOJUw

Welcome to our forum, there, saik190 - :clap:

I would guess that there is one of those "skid" plates under the car that is lose or the heat shield is lose.

:iono:

I replaced the headers so it cant be the heat shield. as for the skid plates we for sure tightened it back up, used a impact gun.

Did it make that sound with the OEM header? Some folks have reported that some aftermarket headers allow more if the combustion sounds to come through - :iono:

I believe it made that sound when it was oem i don't remember that well because its been a while. My buddy says it might be a blown front pipe but we're not sure.

Yep, it could be an exhaust leak, worth checking into - :iono:

Yeah, that definitely sounds like a exhaust leak. What type of exhaust gasket do you have? It may be that gasket vibrating.

I figured out the problem, it seems my stock front pipe cat has been blown haha, the rattling was the beginning of cat getting loose or blown.