I am working on a Beetle that I bought that stopped running, sat up for a while and now I am trying to get it going. I did a compression test and there was no compression on 2 and 3. 1 and 4 only have about 50 lbs. I went back and double checked the timing marks and they are correct. I have fire on all 4 plugs and fuel in all jugs. I am wondering if the headgasket went out or the valves are bad.