My 46 216 has always spewed blue smoke when revving the engine but ran fine in the past and was quite "perky". I haven't used it the past year, only started the truck 2-3 times over the winter/spring in the garage. Then drove only once this summer - at that time the power felt like it was not close to what it had been before. I checked the vacuum and it flutters erratically between 11 and 16 inches at idle. Today I checked the compression, from 1 to 6 it was: 110, 20, 115, 115, 45, 95. When I put oil in #2 and #5 they only went up by 5 pounds each. I pulled the valve cover and all valves and rockers are moving when running. I haven't tried adjusting the valves. Does that hideously low compression on the two cylinders along with the vacuum flutter point more likely to valve guides? Or a possibly some shot valves? Thanks for any insite!
