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[JamesV6CDX]

I can't seem to get a used manifold anywhere. Mine has a pretty clean long crack on top. Can they be welded?

[JamesV6CDX]

Exhsust manifold by the way...

[dad1uk]

They can but I think it needs special rods and or welder......
http://www.mig-welding.co.uk/cast-iron.htm
Might help James..... means nothing to be but then again no surprise there

[serek]

I can't seem to get a used manifold anywhere. Mine has a pretty clean long crack on top. Can they be welded?

with out any problems
think mig welder should do job

[chrisgixer]

Are they cast iron? If so get a professional welder on it. Which will mean removal I would have thought.

Roger Clarke is the man in Reading when it comes to welding. He'll moan it can't be done etc, then proceed to do a top notch job.

[Andy B]

When welding cast iron, I'd say that you need to use a 'stick'/arc (MMA) set, with a cast rod but you have to heat the manifold up first, otherwise, because of thermal shock, you'll end up with a nice crack along side your nice new weld ....... been there - done that a few times in the past. 
If you're paying someone else to do if for you, I reckon that cost wise, you'd be better off with A N Other manifold .... obviously assuming you can get hold of one.

[serek]

are we talking about 3.0 manifolds or 3.2
as this to different type of steal

[Steve B]

are we talking about 3.0 manifolds or 3.2
as this to different type of steal

2.2 

[Marks DTM Calib]

There a nightmare to weld!

Hi Carbon arc rod is what is required.

The only thing working in your favour is that your not looking for a structualy strong weld, just a gas tight one.

[symes]

if anybody notices this---Frost Restoration--they do a special stuff for cracked manifolds and blocks-dont know why i bother as nobody ever checks out---have used the stuff on mine and guess what--------it works---and maybe thats to simple

[steve6367]

This one?

http://www.frost.co.uk/j-b-high-heat-adhesive.html

[cnj]

does anyone know whether you have to clean the crack/split before applying, if so what would you use ?

[Andy H]

if anybody notices this---Frost Restoration--they do a special stuff for cracked manifolds and blocks-dont know why i bother as nobody ever checks out---have used the stuff on mine and guess what--------it works---and maybe thats to simple

Are these the rods? http://www.frost.co.uk/automotive-welding-tools/hts-528-brazing-rods.html

They describe them as brazing filler rods so I assume you need oxyacetelyne kit to use them

[tunnie]

if anybody notices this---Frost Restoration--they do a special stuff for cracked manifolds and blocks-dont know why i bother as nobody ever checks out---have used the stuff on mine and guess what--------it works---and maybe thats to simple

Are these the rods? http://www.frost.co.uk/automotive-welding-tools/hts-528-brazing-rods.html

They describe them as brazing filler rods so I assume you need oxyacetelyne kit to use them

This stuff more looks like average goo through?

This one?

http://www.frost.co.uk/j-b-high-heat-adhesive.html

Be interested to see if it works, as I think FatherT's manifold has a crack. As it's noisey when cold, fine when hot.

[omega3000]

does anyone know whether you have to clean the crack/split before applying, if so what would you use ?

No expert but i thought the crack had to be ground into a V for the weld