Magnaflow Cat-Back Exhaust Vibrations

[LORD VDR]

I recently had a Magnaflow Cat-Back installed on my SRT8, after a couple of days I notice a rattle noise underneath. I took it to the dealer, because someone indicated that it sounds like the heat shield for the cat conv. When they looked at it they determined it was the after market exhaust system vibrating on the support bracket. They told to me take it back and have then readjust the system and place a couple of washers (spacers) on each screw. Well at first it work great when the car was up on the rack the muffler did not hit the bracket, but once the car was started and headed down the road; the vibration was worse and very loud.

I wanted to know has anyone else experience this and if so how did you fix it or can anyone give any suggestions?

I called Magnaflow but without them seeing it, they really don't know. Though they said it sounds like the clamps are loose and again have the installer readjust it and also apply wielding points at the cat conv and joints. Has anyone heard about this technique?

Any assistance is appreciated.

LORD VDR

[greedyk]

Originally Posted by LORD VDR

I recently had a Magnaflow Cat-Back installed on my SRT8, after a couple of days I notice a rattle noise underneath. I took it to the dealer, because someone indicated that it sounds like the heat shield for the cat conv. When they looked at it they determined it was the after market exhaust system vibrating on the support bracket. They told to me take it back and have then readjust the system and place a couple of washers (spacers) on each screw. Well at first it work great when the car was up on the rack the muffler did not hit the bracket, but once the car was started and headed down the road; the vibration was worse and very loud.

I wanted to know has anyone else experience this and if so how did you fix it or can anyone give any suggestions?

I called Magnaflow but without them seeing it, they really don't know. Though they said it sounds like the clamps are loose and again have the installer readjust it and also apply wielding points at the cat conv and joints. Has anyone heard about this technique?

Any assistance is appreciated.

LORD VDR

You don't need spacers installed.
When you install the pipes they need to keep the cross member/bracket in place.
I placed a temporarily 1- 11/2 inch spacer (I used some pieces of plywood) between the pipes and bracket.
Tightened al the clamps and removed the spacer and a perfect fit.
You have to re torque all the clamp after a couple days if not they will relax a little witch could cause the pipes to sag and hit you bracket.
I did this installation with magnaflows and Corsa with no problems
Also Magnaflow makes crapy clamps and I used torctite clamps see link:
Torca
look for torctite in left column.
Also available on ebay



Good luck Gary

[LORD VDR]

Gary which TorcTite (AM or OEM) clamp.

[greedyk]

Originally Posted by LORD VDR

Gary which TorcTite (AM or OEM) clamp.

I am sure it's AM
But here is the eBay link from their store:
eBay Motors: 3" Torctite Stainless Steel Exhaust Clamps Clamp (item 120067153019 end time Jan-19-07 14:30:45 PST)

this is a link for the 3" not sure what you need but they have all sizes
GAry

[LORD VDR]

Gary,

I sent you a private message. I wanted to know if you could answer the questions I ask? Again thanks.

Andre'

[LORD VDR]

Did you replace all the Magnaflow clamps with TorcTite?

[greedyk]

Originally Posted by LORD VDR

Did you replace all the Magnaflow clamps with TorcTite?

yes and send you a pm
gary

[gritz45]

[quote=greedyk;360825]You don't need spacers installed.
When you install the pipes they need to keep the cross member/bracket in place.
I placed a temporarily 1- 11/2 inch spacer (I used some pieces of plywood) between the pipes and bracket.
Tightened al the clamps and removed the spacer and a perfect fit.
You have to re torque all the clamp after a couple days if not they will relax a little witch could cause the pipes to sag and hit you bracket.
I did this installation with magnaflows and Corsa with no problems
Also Magnaflow makes crapy clamps and I used torctite clamps see link:
Torca
look for torctite in left column.
Also available on ebay



You seem to have your problem isolated, but my Magnaflow vibrated against the trunk pan on the left side pipe when the engine was between 1500-1700 RPM's while underway and when sitting still in "D" with the brake applied. I ended up having to bend the trunk pan away from the pipe slightly to completely eliminate the vibration(and keep the outlet centered in the bumper recess). It sounds like you have a different problem, just wanted to let you know my experience.

[LORD VDR]

I do seem to have the problem when it is in idle or just sitting in drive, it seems to get worse at that time and when I'm doing less than 35mph or so, but once it is hot and above 55mph I don't hear or feel a thing. I'll check that out this weekend. Thanks gritz45 for the info.

[cbutler32]

take the cross member off...
I was the guinea pig car for magna flow...
and they took it off...
magnaflow that is...
no use except for holding the stock exhaust up while rolling down the assembly line at the plant...
just an FYI...