When my 099-4 valves were done, the pistons were sent to Anderson to be plated and the casings were honed until they were round and straight from top to bottom. Then, the plated pistons were honed until they were the correct size to fit into the newly refurbished casings. The valve set needed to be removed from the body of the horn for this work to be done. There was some other work done to remove the traditional Olds 'shakers' and to fit stronger valve stems which would not break like the originals. Can't remember if there was any special treatment needed to fit plastic guides but plastic guides were fitted.lost wrote: I tried the slide pull and hear nothing. So your theory is this was a hillbilly valve overhaul? i.e. the valves were replated but the casings weren't really touched, or if they were, they weren't done well? Do you think since the pistons are built up the cost would be less to rebuild the casings, or is that just a moot point?
Unless there is a method I don't know about (I'm not a brass tech and don't even play one on TV), the casings need to be rounded and trued up and the pistons plated larger than the resulting size of the casings after machining and then be honed to the correct size. So, casings first then pistons.