We've used Alumiweld at work to fab up some aluminum enclosures, and I watched a video about it that was very interesting. Alumiweld is like a brazing rod for aluminum, and you apply it using a propane torch and proper surface prep. I have a new Accel base intake that has some thin areas between intake ports - it was cast this way, I didn't port it too thin. I want to build the wall up in these areas to ensure that I have sufficient wall thickness for the gasket to seal, and I considered using Alumiweld for this. The melting point for the Alumiweld is ~780 deg F. I don't think the intake or head get that hot at their juncture, but I wanted to ask first as some of you folks likely know more about this than I do.

If you are not familiar with the Alumiweld, you may be interested in learning more about it. It looks like an easy way for the avg person who does not have a tig to repair or fab aluminum.

Thanks in advance for your responses.

Shawn

 

The only place they get anywhere near that hot is at the exhaust crossover passage... other than that, it should be fine.

 

never used it but from what i've saw or heard it's not a weld where it fuses into the base metal but is more like a braze or solder that sticks to the surface. if it were me i'd GTAW (tig) weld it. if you have to pay someone the cost shouldn't be that great and you can save a little by doing the prep work your self.