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Posted by Pete C. on November 14, 2006, 11:36 am
Please log in for more thread options Ignoramus11550 wrote:
>
> I have a Cummins L423D diesel engine that I am trying to slightly fix
> up.
>
> It has a muffler that was hit from the top sideways (when the engine
> was being moved on a forklift, I suppose).
>
> Anyway, the muffler attaches to exhaust manifold by means of a diamond
> shaped flange and two bolts on the far ends of that diamond. (I can
> make and post pictures on my webpage).
>
> The impact made that flange non-flat, like a "saddle". The thickness
> of the flange is about 1/4". The deflection is about 3/32"
> (guesstimate).
>
> I would like to straighten the flange somewhat. I do not have a forge
> but I have a piece of rail, some assorted 4140 blocks and sledgehammer
> (3 and 8 lbs, IIRC). I also have a decent TIG welder.
>
> I see two choices:
>
> 1) try to straighten the flange by putting it on the rail or flat 4140
> block and pounding. (cold)
>
> 2) Try to weld a little filler to some areas and then grind the
> surface to be reasonably flat (should be fine with a gasket).
>
> The muffler's body was also bent a little bit (where the pmuffler's
> pipe enters its cylindrical main body) but I already fixed that
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Date: Tue, 14 Nov 2006 16:36:13 GMT
Ignoramus11550 wrote:
>
> I have a Cummins L423D diesel engine that I am trying to slightly fix
> up.
>
> It has a muffler that was hit from the top sideways (when the engine
> was being moved on a forklift, I suppose).
>
> Anyway, the muffler attaches to exhaust manifold by means of a diamond
> shaped flange and two bolts on the far ends of that diamond. (I can
> make and post pictures on my webpage).
>
> The impact made that flange non-flat, like a "saddle". The thickness
> of the flange is about 1/4". The deflection is about 3/32"
> (guesstimate).
>
> I would like to straighten the flange somewhat. I do not have a forge
> but I have a piece of rail, some assorted 4140 blocks and sledgehammer
> (3 and 8 lbs, IIRC). I also have a decent TIG welder.
>
> I see two choices:
>
> 1) try to straighten the flange by putting it on the rail or flat 4140
> block and pounding. (cold)
>
> 2) Try to weld a little filler to some areas and then grind the
> surface to be reasonably flat (should be fine with a gasket).
>
> The muffler's body was also bent a little bit (where the pmuffler's
> pipe enters its cylindrical main body) but I already fixed that
> sufficiently to provide clearance for the oil fill cap.
>
> So... any flange straightening suggestions will be gratefully
> received. I can provide pictures, as I said.
>
> thank you.
>
> i
Cut the flange off the pipe, flatten appropriately with hydraulic press,
sledge and backer, etc. then TIG back on to the pipe.
Pete C.
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