I just finished a compression test.
Cylinder 1: 170
Cylinder 2: 180
Cylinder 3: 175
Cylinder 4: 0
I put a bit of oil in cylinder number 4 and redid the compression test to see if the rings were hanging on for dear life but that does seem to be the case.
I will check the valves to see if shims and valves were ruined in cylinder 4 but I am already counting on replacing the piston in cylinder 4. Just need to scrounge one from somebody.
I'll let you guys know what I find when I take the valve cover off. But, for the sake of thinking ahead, does anybody have pistons for an 04 Saab 95 ARC lying around?