What pressure was used? I never use sand to clean cast aluminum. I normally use glass bead at around 30 psi. You'd be surprised how much material is removed by sand blasting even new aluminum castings.Just a regular box sand blaster. done by my dad..took him 5 minutes
it was already pretty bad before he did it...so i doubt he messed it up...
Sometimes those intake castings are really pourous and even TIG welding will yield so-so results in building up material (better suited for repairing cracks, and even then it's tough). If the manifold has sentimental value, or you're dead set on using it, you might have better luck with using epoxy.
Hey Bruce,What kind of media did they use?The right kind of media shouldn't have done that?bm
I have an anode in my radiator...to protect my intake and afr heads.I still wouldn't have used sand on aluminum...he should have used glass or walnuts...sand is way too aggressive(good on steel).bmHey Bruce,
I don't think it was the media that did that. It's corroded away. That is sometimes a problem with using aluminum manifolds with iron blocks. You can buy small anodes that hang in your radiator that will slowly scarafice themselves so your aluminum parts don't. Home water heaters have these anode rods as well. Once the anode rods are eaten away, the water heater starts being eaten. The main difference in a 10 year warrantied water heater and one with a 5 year warranty is the size of the anodes they install.