I just completed replacing the upper tensioner on a 1995 Sentra GLE (1.6). I figured I would post instructions and pics to help people in the future. I have to say thanks to 'Kyu-ju-kue', 'tieggonzalez', and 'off_da_meter' for helping me get started and prviding advice on this one. My car has 233K on it and is still running strong, however it sounded like a tank. I though the entire timing chain would need to be replaced, but through the advice of people on this forum, I checked the upper timing chain tensioner. IT WAS TOTALLY SHOT. Cost of the tensioner was $55 from Advance, and total time spent was about 2 hrs. Hopefully I can leave the pics for these instructions on my server, however if someone wants to make them permanent here or add to them, feel free.