Cast welding/filling?

[Peckerwood]

Hi guys - sorry if this is in the wrong section, i have ZERO knowledge of welding, however i do have an issue that i believe someone here may be able to help me with.

Ive recently picked up a supercharger to use on an engine im building, however the unit came from a crashed vehicle and the cast has suffered a bit of damage. Ive contacted the manufacturer and they no longer produce the part, so it would seem that a repair is my only way forward.

As you can see there isnt a gaping hole in the cast, however the damage is significant enough to compromise the inside of the cast too. Has anyone ever dealt with a similar problem? Any advice on how to proceed with this would be greatly appreciated.

Finally the view from the inside.

 

[hotrodder]

Looks like cast aluminium, pretty straightforward repair for any experienced ally welder especially if you're able to take the thing apart so they can preheat the housing and prep it with a diegrinder without worrying about the bearings etc getting contaminated/cooked. Assuming it is ally most would probably choose to TIG it with 4043 or 4047

 

[Rrunnach]

Was asked to do something similar, was cast alloy, guy couldn't remove impeller, so I knocked him back.