Exhaust Manifold Broken - Replacement Sources

[toddwulf]

I rolled a log over the FEL and it took out my exhaust stack - Broke at the cast manifold so I have to replace it. Other than my NH dealer, is there anywhere else I can look for the manifold that might come any cheaper. Does anyone have any idea what it'll cost me? I'm doing the R&R myself.

Thanks.

 

[Hoeman00]

My mom-in-law kept hitting low
tree limbs and breaking the
manifold on her IH 284 and I
kept mig welding it back together.
I used .035 wire and weld it,then the next
time it broke was farther up.
I did this atleast 6 times and put the
shortest muffler I could find on it.
Weld yours up, u don't have anything to
lose.

 

[tinner]

I second the welding motion. The iron in that 1998 manifold should still be in good shape, so if done right the welded joint should hold up as new.

Bob in the woods of Vermont

 

[djradz]

Todd, if you decide to weld it, there's a procedure for welding cast iron that you should follow to ensure success. Primarily it involves preheating the parts and using special rod designed for cast iron. Most maintenance tool and repair shops should have something available for cast iron repair.

 

[Hoeman00]

W/ mig I just welded it w/o
preheat.
Figured nothing to lose and found it
worked great (many times).
The wire welder has a lower heat
output (using .035 wire vs 3/32 or 1/8" sticks).
The preheat and slow cooldown for
stick rod takes a lot of time.

 

[djradz]

Preheat doesn't hurt, or could it? Always thought that the best way is to minimize the localized differential heating for the most successful weld, regardless of the application. What do you think. We just used a regular torch.

 

[hazmat]

<font color=blue>Preheat doesn't hurt, or could it?</font color=blue>

Generally speaking, you get a stronger weld if you preheat.

It's an old trick of welders who send samples in for qualification.

 

[Hoeman00]

At work we only preheat tool steel and then
to a uniform 400 - 600* and reheat after
welding.
This is for carbon precipitation (the drawing
of carbon to the sides of weld that becomes
brittle.
This doesn't happen as much on low carbon
steel.

 

[toddwulf]

Thanks for everyone help on this. Probably saved me some bucks by having it welded. Took it to a local welder and he did a nice job for $45. It's holding up fine after two days of vibrating around my land.