Will the blaster really get all the way through the runners? I have what is needed, might as well try it.
Pp I was going to use a storage tub and fill it to cover the top of the intake with white vinegar or use CLR. I’ve seen CLR and water clean all the parts of 4 cylinder engine (after degreaser is used first of course), but only heard about white vinegar used for cleaning rust. The rust remover sold for automotive use is too expensive and I don’t want to deal with removing that black residue it leaves behind especially on something like an intake manifold.