I recently bought an excellent 83 240d manual with a seized engine. I have a spare 82 240d engine that runs good to swap in, but would like to fix the one I bought with 190k on odometer. Cannot turn engine with 24 inch pull handle on crank pulley. Removed valve cover: timing chain intact, cam and cam towers look good. Removed glow plugs and removed starter, still cannot turn over. Any suggestions on what to try next will be greatly appreciated.