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Old 01-09-2017, 08:03 PM
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Oval a small section of exhaust?

Need to oval a small (lets say 4 to 5 inches) of exhaust pipe under a car because its hitting a subframe brace.
I can pull the brace to do the work but it's a 1 piece exhaust so pulling it isn't on the list.

Dont want to just hit it with a hammer.
Whats a good way to do this?
Clamp?

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Old 01-09-2017, 10:26 PM
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buy an oval pipe and cut and weld
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Old 01-09-2017, 10:30 PM
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Originally Posted by vinniekq2 View Post
buy an oval pipe and cut and weld
Just trying to bend it oval for now. Car will get full exhaust hopefully summer time.
Just trying to figure a way without crushing or puncturing current exhaust
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Old 01-09-2017, 11:15 PM
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Make a clamp with 2 pieces of flat bar and a couple of bolts. Attach to pipe and tighten the he&& ut of it. That will crush the pipe.

Sam
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I have tried most all of it and now do what is known to work..
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Old 01-09-2017, 11:19 PM
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Make a clamp with 2 pieces of flat bar and a couple of bolts. Attach to pipe and tighten the he&& ut of it. That will crush the pipe.

Sam
This sounds doable thanks.

I was thinking clamp of some sort but hadn't thought of this.
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Old 01-10-2017, 09:50 PM
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big C clamp should bend it no problem but its not going to be oval when done it will smooch out with points on the end best to only bend it the least amount possible. Also can you bend the pipe down for clearence closer to the road. or just make a dent to clear the bracket.

Cutting and welding is the best way to go but if your replace it any way try some 2x4 and the Jack.
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Old 01-10-2017, 09:53 PM
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Turns out this pipe is harder than expected. I actualy did try 2x4 and floor jack and actualy lifted the car off the stands and just a small dent in the pipe.

Tried a c clamp and it bent; the c clamp.

Im mad now its getting the hammer over the weekend.

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Old 01-10-2017, 09:55 PM
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heat t up cherry red, and punch it
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Old 01-10-2017, 09:57 PM
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Quote:
Originally Posted by hotrod389 View Post
heat t up cherry red, and punch it
Thats along the lines i was thinking.
Heat the area and hit it with a bfh
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Old 01-10-2017, 10:37 PM
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Quote:
Originally Posted by toos10w View Post
Thats along the lines i was thinking.
Heat the area and hit it with a bfh
whats BFH for?
you can vice that no problem,
If you wanna get all redneck with it, heat it up on the top only and use a jack
with the exhaust installed.


stay away from the muffler bearings tho, they don't like heat.
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Old 01-10-2017, 10:53 PM
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Quote:
Originally Posted by hotrod389 View Post
whats BFH for?
you can vice that no problem,
If you wanna get all redneck with it, heat it up on the top only and use a jack
with the exhaust installed.


stay away from the muffler bearings tho, they don't like heat.
Lol dont have an oa just propane so doubt I'll get it hot enough to just vice it.
Yeah muffler bearings are far enough down stream thats no problem.

Btw the exhaust is above the subframe brace.

I'll get it figured out this weekend and if not I'll try getting exhaust sooner
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Old 01-10-2017, 11:05 PM
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Ok go back to plan A with a real C clamp not one you got for 99 cents. Get an old one made from tool steel or new one made to actually last. They should be able to bend exhaust pipe. And have a rod that is thick enough not to bend. All else fails the big vise is the only option other than welding in a new oval section.

Ask an old person if they have a C clamp that thats a good heavy duty one. The bigger the better makes it easier to flatten the pipe with less effort.
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Old 01-10-2017, 11:10 PM
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Quote:
Originally Posted by hcompton View Post
Ok go back to plan A with a real C clamp not one you got for 99 cents. Get an old one made from tool steel or new one made to actually last. They should be able to bend exhaust pipe. And have a rod that is thick enough not to bend. All else fails the big vise is the only option other than welding in a new oval section.

Ask an old person if they have a C clamp that thats a good heavy duty one. The bigger the better makes it easier to flatten the pipe with less effort.
Yeah the big c clamp from sears is junk bent and didnt do much to exhaust pipe. Tho I'm wondering why i was able to jack the car up with the exhaust and only made a tiny dent.
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Old 01-10-2017, 11:45 PM
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Quote:
Originally Posted by toos10w View Post
Yeah the big c clamp from sears is junk bent and didnt do much to exhaust pipe. Tho I'm wondering why i was able to jack the car up with the exhaust and only made a tiny dent.
Put the 2x4 end to end so it put more pressure on a smaller area of the pipe. Might need to make a few passes but should work it out. What kind of car. Some of the fwd cars now a days have almost no weight in the back. You may also get the same effect from moving the 2x4 side ways 90 degrees. But i think you will need to use the 2 inch side to make it work. Just bend it a inch at a time. same with a c clamp.
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Old 01-11-2017, 12:07 AM
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Quote:
Originally Posted by hcompton View Post
What kind of car. Some of the fwd cars now a days have almost no weight in the back.
Now theres a fun question.
Its a 92 cavalier so maybe 2700lb car.
The subframe brace is at the front of the car so its where most of the weight is.

Cars hopefully getting a motor swap in the summer along with new exhaust but don't want to kill what is on it too bad before then.
Going to get new exhaust tho even if it keeps the old motor tho.
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