Exhaust rattle ?
Thread Starter
Racer
Joined: May 2013
Posts: 371
Likes: 20
From: Ft. Collins Colorado
Exhaust rattle ?
Stock 98 A4 having a rattle when in gear but not when in neutral/park. Sounds like it might be a baffle in 2 yr. old Flowmaster's. Is there baffle system in the cats?
Thanks for any/all input
Thanks for any/all input
Le Mans Master
Joined: Sep 2014
Posts: 5,278
Likes: 539
From: Kelowna BC
Lower RPM can bring out rattles. Can you get it up on ramps and have someone hold it in drive while you check under?
All sorts of things could be rattling; front spring hangers, rear spring hangers, cats (internally many are like a small honeycomb and can come loose)...
Best to get under there either with a helper or rap on the exhaust with a rubber mallet or the palm of your hand.
All sorts of things could be rattling; front spring hangers, rear spring hangers, cats (internally many are like a small honeycomb and can come loose)...
Best to get under there either with a helper or rap on the exhaust with a rubber mallet or the palm of your hand.
Thread Starter
Racer
Joined: May 2013
Posts: 371
Likes: 20
From: Ft. Collins Colorado
Lower RPM can bring out rattles. Can you get it up on ramps and have someone hold it in drive while you check under?
All sorts of things could be rattling; front spring hangers, rear spring hangers, cats (internally many are like a small honeycomb and can come loose)...
Best to get under there either with a helper or rap on the exhaust with a rubber mallet or the palm of your hand.
All sorts of things could be rattling; front spring hangers, rear spring hangers, cats (internally many are like a small honeycomb and can come loose)...
Best to get under there either with a helper or rap on the exhaust with a rubber mallet or the palm of your hand.
Tech Contributor
Joined: Dec 1999
Posts: 32,910
Likes: 2,402
From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
EXELLENT Recommendations.. 
Its called C5 BONDING!!! You will enjoy the expierence!
Le Mans Master
Joined: Mar 2011
Posts: 6,835
Likes: 302
From: Columbia SC
Take a look at this, it might be your cause. Simple fix.
https://www.corvetteforum.com/forums...st-rattle.html
Mr. Sam
https://www.corvetteforum.com/forums...st-rattle.html
Mr. Sam
Burning Brakes
Joined: May 2013
Posts: 1,249
Likes: 142
From: Lynn MA
It very well could be your flowmasters. I had a rattle which I found by shaking each muffler and there it was so replaced them with new. I didn't know how old they were but it solved the problem. Shook them both when off and sounded like something broke loose inside alright.
