Hi. I took my 83 240 to a CA smog test today and I passed on CO and HC and failed because my timing was 22 degrees BTDC, and the spec is 12 degrees. The guys at the service station tried to change the timing but were unable to turn the distributor (the loosened the screw that holds it down). I took it to another shop which fixes volvos and they said, "yup your distributor is frozen." and they put some kind of penetrating oil on it which they said wouldn't eat the seals. I have the white screw on dist cap which they told me is the chrysler ignition. It appears that there are to notches in the bottom of the dist which could be used to turn the cap with the right tool, anyone seen that? Thanks, Mike