Straightening exhaust Pipe

bobpo1

bobpo1

Senior Member
Has anyone out there had to straighten the muffler pipe to align it properly with the Exhaust Manifold? I have the tube of exhaust putty. What's the easiest way to align the pipe?

I am getting fumes from this connection and it is driving my wife crazy. When we go for a drive, she hangs her head out her window and sometimes with a handkerchief.

Downright 'barrassing. That's not to mention the exhaust noise coming from the engine compartment..
 
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Re: Straightening exhause oioe

Likely it is the exhaust manifold that is warped (drooped) and bending the pipe only aggravates the problem. If you are still adamant about bending the exhaust pipe, then use a floor jack handle inserted into the pipe and move it in the direction you need.

Also, be sure and verify that the flange on the pipe does not have a welded seam that is causing the leak.
 
Re: Straightening exhause oioe

by using the insert pipe it brings the two together in a straight line. it will also solve your leak if the bell on the pipe flange is good.. no muck or gaskets required.
replace the clamp also it has an up and a down
i dont blame the wife i wouldnt want to ride in it either:)
 
Re: Straightening exhause oioe

Check to make sure there isn't a ridge of metal around the inside lip of the muffler where it attaches to the manifold.
Using a floor jack raise the muffler into place against the manifold just enough to make good contact. Adjust the muffler so it is perfectly aligned with the manifold. You may need to leave the tail pipe clamp pretty loose to do this.
After it is lined up perfectly lower the floor jack just enough to apply a thin bead of the muffler cement to the muffler flange. Raise the jack up and install the muffler clamp. Make sure the clamp is right side up.
You probably don't need to use the muffler cement but it really doesn't hurt to use a bit of it.

Good luck.
 
Re: Straightening exhause oioe

I used a couple bungie cords and floor jack to get the exhaust pipe lined up with the manifold. Put the clamp on. Bent a piece of flat bar, drilled a couple holes and made an off-set bracket to hold the tail pipe where it "wanted" to be.
 
Re: Straightening exhause oioe

Also make sure that the flange is adequate. I had problems with my pipe and used an insert. It still came apart because the flange was too small. Once I had the manifold connection flared properly, it does not leak and no muffler cement used. Some older mufflers, like mine, were made this way.
 
Re: Straightening exhause oioe

For my wife's sake (and of course mine) I will try these methods.
Thanks for all the input.

P.S. I sprayed carb cleaner around the exhaust manifold and didn't note any change in running.
 
Re: Straightening exhause oioe

As said, I've just used a length of cheater pipe to 'position' the front pipe correctly. The tighter fit of the 'cheater' the better.
 
Re: Straightening exhause oioe

CarlG said:
What is an "oioe"?
Click to expand...

I think it is dependent on Year and Model:

"OIOE (Operation No. - AutoIncrement) is a standard SAP transaction code available within R/3 SAP systems depending on your version and release level. " :p;):D
 
Re: Straightening exhause oioe

I took mine to Midas Muffler, he heated it with a torch and with a long pipe, bent it to my spec. Didn't charge me a cent.
 
Re: Straightening exhause oioe

I grease the flare & the inside of the clamp, to help It settle in & TAP-TAP-TAP, ON THE CLAMP, as I tighten it. Be sure to re-tighten the clamp bolts, after driving it some.
Bill W.
 
Re: Straightening exhause oioe

bobpo1 said:
For my wife's sake (and of course mine) I will try these methods.
Thanks for all the input.

P.S. I sprayed carb cleaner around the exhaust manifold and didn't note any change in running.
Click to expand...

Spraying something around the manifolds, is to find a suction leak on the intake.
 
Re: Straightening exhause oioe

I tried the heat method on my stainless aries and a new manifold. It didn't work. Took it to a friend that owns a muffler/rad shop and we used his tubing bender. worked perfectly.
 
Re: Straightening exhause oioe

Prior to installing the clamp, wrap several layers of aluminum foil around the joint. Then install the clamp and trim excess foil.
Works for me.
 
Re: Straightening exhause oioe

Had this problem before with what they used to call the $50 muffler and in conjunction with a typical drooping exhaust manifold. The flange was never wide enough so I took it to a muffler shop to widen the flange. Past repro clamps never were right so always used an original. Centered the flange to the manifold and determined the drop of the tailpipe. Heated and bent the exhaust pipe end so the tailpipe would have its slip fit in its frame clamp so it could slide with heat expansion. This prevented stressing the manifold both by eliminating the forces upward as well as forward. Never cared for the band aid fixes of cement, gasket, or inner sleeve.
 
Re: Straightening exhaust Pipes

FWIW:

A few years ago Chris Pelikan, the carb rebuilder guy, did a series of experiments on the causes of "vapor lock" and excessive heat under the hood using several cars and an infrared digital thermometer.

Vapor lock is also a condition where gasoline boils and creates vapor in the sediment bowl and the fuel line and so liquid gas can not get to the fuel bowl ... (if you do not believe in vapor lock)

1. One thing that he looked at was the use of the "inserts" in the manifold/ exhaust pipe junction.

He found VERY high manifold/pipe temperatures in the area on each side of the insert.

His conclusion was that the use of the insert created a restriction in the flow which raised the temperature excessively and reduced engine power.

2. He also found that old "$50 mufflers" with the NON Mandrel bends (where the diameter of the pipe is reduced in the bending process) had the same effect as using the insert.

The folks at Aires muffler found the same problem with the "non mandrel bends" in the cheap mufflers.


NOTE: response in post 26 is the only thing in this thread that is poor and miss leading.



1032
 
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Re: Straightening exhause oioe

bobpo1 said:
Thanks, you're right. I tried to correct it but it would not allow me to do so. Senior moment
Click to expand...


Bob,

You may change the title of your post by:

1. click Edit



2. Click "Go Advanced" at bottom of window


Now a window appears where you can edit your title! :)

:)
 
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