I was planning on fixing a deep scratch (2-3mm deep) on the deck of a cylinder head caused by shipping damaged, by adding some more metal to the area. Once this blog is attached to the head, I would have it surfaced, and smoothed out.

What size tig would be required to weld on basically onto a brick of aluminum? Would a new Miller Syncrowave 200 or Dynasty 200DX fit the bill? I was planning on picking up a tig to add to my collection of tools this summer, and thought this might be a fun project. I have 2 spare heads I can play around on before this one, and the task seems pretty simple as it is just adding a bit of filler metal into a cleaned out scratch that is prepped for welding. Not like joining 2 pieces of aluminum sheetmetal standing upside down inside a tunnel or anything

 

Big.

I wouldn't even try it with the sync200, and the only with the dynasty 200 if you preheat the hell out of it. A sync350 or dynasty300 would be a better choice.

 

Well that sucks. I knew it was pushing it for that size.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">Big.

I wouldn't even try it with the sync200, and the only with the dynasty 200 if you preheat the hell out of it. A sync350 or dynasty300 would be a better choice.</TD></TR></TABLE>

I've never done cast, but why would you need more amps? 3mm is ~1/8", so for full penetration of the crack you'd only need 160-180amps or so (and even less since it's preheated) - wouldn't a Sync200 be plenty?

 

you need to to consider the overall thickness of the part. Not the depth of the scratch.

 

Get a bottle of helium and put it on DC straight like your welding steel.And don't pre heat it. just weld it .You will be surprised

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by RMF &raquo;</TD></TR><TR><TD CLASS="quote">Get a bottle of helium and put it on DC straight like your welding steel.And don't pre heat it. just weld it .You will be surprised</TD></TR></TABLE>

Might want some practice first.

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by k24em2 &raquo;</TD></TR><TR><TD CLASS="quote">

Might want some practice first. </TD></TR></TABLE>

but then you won't be surprised

 

haha i fixed a broken head on my car late night when the machine shops and what not wernt open with my 250 syncrowave. its still on a running car to this day

 

I have welded heads and thick *** alum.with a 180 air cooled with helium.The Helium burns so damn hot that you can just start welding without having to sit there all day with your foot in it looking for a shiny spot. But you can't EVEN weld thin **** though.

 

Welding al with DC - is awesome but only for thick ****...

I was surprised when i first tried it myself...

 

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Bailhatch &raquo;</TD></TR><TR><TD CLASS="quote">

but then you won't be surprised </TD></TR></TABLE>

lol!

 

Man, RMF is full of tricks....dang.....

 

if you preheat, and the scratch is only 3mm deep why would you need such a high amperage machine. i think 200 amps would be plenty. get the head to nice and warm {but not hot enough to warp the **** out of it} and rock out. you dont need 15 inches of penetration here.

maybe im crazy

 

you aren't that far, drive up here next weekend and I'll fix it for you