Welding a cast alloy sump

[langy]

You would want a WP26 torch, also a 3.2 tungsten, preheat helps a lot

 

[scottmk1]

Hi Langy. I preheated the sump with propane, not sure what temp I got it up to but it was that hot i could barely pick it up. What is a WP26 torch? Any particular type of tungsten?

 

[langy]

Hi Langy. I preheated the sump with propane, not sure what temp I got it up to but it was that hot i could barely pick it up. What is a WP26 torch? Any particular type of tungsten?

I use the white for ally but I don't do that much ally unless its my own, WP 26 is a torch capable of coping with more amps

 

[scottmk1]

Ok, cheers for the info. Had a look at the WP26 torches, too expensive to buy just now though at nearly £100 delivered.

 

[G19Engineering]

Scottmk1,

Would it be a zetec sump that you are trying to weld by any chance?

I convert zetec sumps to fit kit cars and Mk1/2 escorts as part of my business. I don't want to give all my secrets away but i will tell you some of the different zetec sump castings are pretty un weldable. Its all down to what casting numbers they have on them. If you get really stuck and want me to make you a sump you are welcome to gie me a call. Doug. 07886 005962

 

[scottmk1]

Hi Doug, it's a Mazda MX5 sump from about 1990, so not a Ford item. I have seen other folks getting these sumps welded with good results. My problem is mainly lack of experience and by the sound of things the welder and torch are probably too small.

 

[derekm]

you are goingto need 200amp a 3.2mm tungsten (blue tip) and big cup (8 or 7) as well.

Why not fab it up out of steel sheet. it will be quicker to do and easily within the scope of your welder.

Jigsaw the the flange out of a sheet. then weld the sides and bottom on

Derek (ex kit car racer)

 

[hotrodder]

Not so relevant from an oil soaked POV as it's an old PRV-V6 inlet manifold from a Renault Alpine something or other and fillet welds but FWIW



the tungsten flavours/sizes thing is part personal preference... that was done with a 2.4mm tungsten and filler (4043) @ 200A, 50Hz and around 68 - 70% EN. The carb spacer was sat in the oven being preheated (gas mark 4) while i did all the fiddly bits inside- various water passages to block off etc

 

[scottmk1]

Ok, looks like I'm going to have to farm this work out. Anyone nea Fife willing to weld it for me?