Just did a compression test on my b20b with mixed results. cylinder 1 and 4 are both around 190 but 2 and 3 are 160ish. I did a block guard before I swaped it in, so i probably caused this problem. My question is... I was unable to run the engine to get it warm before I Tested it(fresh swap so its not ready to run yet) Could that have an effect like this or is it more likely my head gasket job.