Jon recommended making a small slidehammer that consists of 1) a machine screw to thread into the checkvalve, brazed onto 2) a 3/16"X6" long bolt to serve as the shaft, with 3) a 1/4" nut slid over the screw-and-bolt assembly to serve as the sliding weight. That sounds a lot like my mental picture of the factory tool described in the GMC shop manual. Thanks, Jon.

1946 Chevy pickup, 1948 Chevy suburban, 1950 Chevy pickup, 1952 GMC pickup, 1957 Chevy pickup, 1939 Chevy pickup