Broken Exhaust Flange
Thread Starter
7th Gear
Joined: Mar 2006
Posts: 7
Likes: 0
Broken Exhaust Flange
1999 C5 with 58,000 miles, muffler and tips have dropped 3-4 inches on driver side.
In checking it appears the flange on center pipes ( factory install) has a broken weld, can move flange left to right about 1 inch.
Has anyone heard or seen anything about broken exhaust flanges.
Thanks
Carver
In checking it appears the flange on center pipes ( factory install) has a broken weld, can move flange left to right about 1 inch.
Has anyone heard or seen anything about broken exhaust flanges.
Thanks
Carver
Safety Car
Joined: Feb 1999
Posts: 4,043
Likes: 342
From: Central NJ
Very common problem. Have the flange rewelded or go for an aftermarket x-pipe....
1999 C5 with 58,000 miles, muffler and tips have dropped 3-4 inches on driver side.
In checking it appears the flange on center pipes ( factory install) has a broken weld, can move flange left to right about 1 inch.
Has anyone heard or seen anything about broken exhaust flanges.
Thanks
Carver
In checking it appears the flange on center pipes ( factory install) has a broken weld, can move flange left to right about 1 inch.
Has anyone heard or seen anything about broken exhaust flanges.
Thanks
Carver
Advanced
Joined: Oct 2005
Posts: 92
Likes: 1
From: CT
I'm going to re-weld but does any body know what the exhaust pipe material is? I'm guessing a 300 series Stainless?
Alternatively, has anyone done this welding & know which type of rod works?
Racer
Joined: Sep 2006
Posts: 260
Likes: 1
From: Chesterfield MI
Common issue. I drove my car to work one day it was fine. Went to leave and the car was real loud.....Checked the muff and the pipe broke away from the flange that was still bolted together. I pulled them and had them welded, but decided to put Corsas on it anyway.
Advanced
Joined: Oct 2005
Posts: 92
Likes: 1
From: CT
I've got this problem also. One flange broke off the X-pipe & the other is barely holding on.
I'm going to re-weld but does any body know what the exhaust pipe material is? I'm guessing a 300 series Stainless?
Alternatively, has anyone done this welding & know which type of rod works?
I'm going to re-weld but does any body know what the exhaust pipe material is? I'm guessing a 300 series Stainless?
Alternatively, has anyone done this welding & know which type of rod works?
GM's welding on this is horrible! My welder was shocked & pegged the OEM work as simple & crude stick-welding.
We re-welded using 600 rods in a TIG welder. We also found it better to weld on the opposite side of the flange that GM welded on. (Weld on the flat mating-surface of the flange, then grind back so it's flat again.)
Mike
Team Owner
Joined: May 2001
Posts: 36,836
Likes: 244
From: Dear Karma, I have a list of people you missed.
St. Jude Donor '08-'09-'10-'11-'12-'13-'14-'15-'16
I'll answer my own question since I did get it re-welded.
GM's welding on this is horrible! My welder was shocked & pegged the OEM work as simple & crude stick-welding.
We re-welded using 600 rods in a TIG welder. We also found it better to weld on the opposite side of the flange that GM welded on. (Weld on the flat mating-surface of the flange, then grind back so it's flat again.)
Mike
GM's welding on this is horrible! My welder was shocked & pegged the OEM work as simple & crude stick-welding.
We re-welded using 600 rods in a TIG welder. We also found it better to weld on the opposite side of the flange that GM welded on. (Weld on the flat mating-surface of the flange, then grind back so it's flat again.)
Mike
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Tech Contributor
Joined: May 2008
Posts: 3,100
Likes: 17
From: Somers, CT and Clermont, FL
St. Jude Donor '09-'10-'11-'12-'13-'14-'15-'16
It's a very common problem. After I put on Z06 Titaniums, my stock exhaust was installed on a 1999 to fix the same broken weld as yours.
