Re: Stewart's 1955 Packard 400

Posted by John On 2017/10/26 10:21:36

Stewart, I have rebuilt many Quadrajets in my earlier years as a mechanic. I do not recommend using any blast media on any part of a carburetor. The metal is soft and it is likely that any media, be it glass bead or walnut shells, will deform mating surfaces which will impact operation. I have always used a good "dip" product, such as ZEP (not sure if it is even still available), followed by a wash with hot water and then blow dry with compressed air. The loss of anodizing should not have much, if any, effect on carb operation, unless there is pitting on any of the internal air flow surfaces. I don't think applying any paint type finish to the outside would be feasible since it may allow heat to build up internally which could affect operation.
Just my two cents worth.....
John