After complete disassembly, cleaning, new oil seal, new gasket and reassembly, my 66 BJ8 steering idler binds. The shaft seats nicely, and rotates freely until I put the cover on. Anything more than finger tight on the bolts results in the cover binding on the top of the shaft. I tried each position possible for the cover, and added an additional, home-made, thicker gasket, to no avail. There was no shim at disassembly, and none shown in the service parts manual. The top of the shaft sits proud of the idler body just enough to touch the cover. Any ideas? Thanks.