Of all the pumps that I restore, the AC pumps seem to be the most prone to corrosion. Carter, which Ford and Chrysler use, seem to hold up much better externally. The Carter pumps however seem to have a propensity to corrode from the inside out. I can disassemble what appears to be a perfectly good Carter core and discover it to be unusable due to excessive corrosion. Luckily this is not all that common. The AC pumps seem to not have the internal corrosion problems of the Carter pumps and both appear to be of different casting materials. I do not see any way to use fillers to repair pitting and still keep a new appearance being as any filler is going to be of a different density.
-Fred-
-Fred-

