1995 Saturn SC2 needing info on time chain replacment.

Engine Mechanical problem
1995 Saturn SC2 Front Wheel Drive Automatic 189000 miles

I have a 1.9 liter engine in my 2 door. I have a dead miss in number 4. I ran a compression test on munber 4 and I am only getting 20lbs. On number 4. The spark plug is wet from gas. There is no findings of oil on the plug. I think that it might be a burnt vavle. I am looking for info on setting the timing chain. I need to know where and how to set marks on cam gears and on the crack shaft. Any info on this matter is greatfulley welcomed. Thanks gmonkey1969