Exhaust question, Rattle or Rasp
 

So right now I'm running a magna flow catback without a resonator in the mid pipe area. Sounded great before, then today I installed a Berk HFC. After install and making sure I installed all the gaskets and everything was all tight, upon driving it around while it was cold, there was rattling from 4k-7k range. Once it warmed up throughout the day there was a different rattling sound from 4k-4.5k. Now will this be fixed by adding a resonator in the mid pipe area, or is there another reason why it's rattling.

Resonator won't fix a rattle.

I reckon some part of your exhaust is lose or banging up against something.

humfrz

Well, went back under the car and checked all the bolts, and tried wiggling the pipe and it wasn't hitting n anything.

Going to try to put a resonator back on and see if it helps.

Well, OK....... that might do it ....... :iono:

Sometimes when an engine "torques over" a part of the upper exhaust can hit and vibrate on a part of the frame/undercarriage ...... :iono:

I hope you get it sorted out ...... :)


humfrz

Alright problem solved, put a resonator on and no more rattle/rasp. Only problem now.... It's not loud enough....

humfrz redneck fix ....... pound a piece of pipe half way through the resonator ...... :D

I'll bet you that the Berk pipe has a crack in it. A hairline crack can be a bitch to find and will make a rattle that will change with the temp of the pipe. Check around the flanges and all the welds. Bend and flex them. It could also be in the hanger area.

I had a catback exhaust with hairline cracks at some brackets in the axleback section and once the cracks were welded the rattle went away.