Well, thank you in advance for your advice. To recapitulate My 240 D has 102K miles and the previous owner put in a new timing chain and after that it wouldn't run. No other info. I went over it and the valves were way out, the timing was way off(ie 1 degree BTDC). I set these to spec and pulled the injectors. they had very poor spray patterns so I put in 4 new nozzles and fixed that problem. I was worried about sticking rings because the injector nozzles had terrible carbon buildup and cleaning them released a orange thick scum which I guessed to be veggie oil? There was also corrosion on some parts. Once reassembled with 4 good nozzles I soaked the pistons for a week with lacquer thinner and MMO. Finally I decided to order a compression tester(should have done that first!!) The numbers were 95,90 ,80 and 80. Compressed air came out the intake manifold after setting the #1 piston at TDC. Bad sign. What happened? My guess is that the previous guy screwed up the TC installation and then cranked it over bending the valves? Any ideas from the resident geniuses on this site? If I need a valve and head job is there advice? Like reusing head bolts, putting in new guides etc? Any other ideas to be sure this is the problem? If this car wasn't in cherry condition I'd throw in the towel. O rust, O dents, good seats.