Ok i got a 200 Sunfire GT and i tryed to change the crank pulley. I spent aqbout 3 hour trying to get it out. Nothing do, not even a puller. We got it out a bit(about 1/8 inch) Since we were not able to remove it we put it back to place and reassemble everything.

Now i got a major oil leak. Did i broke the crank seal? or it is possible that it didnt bolt it tight enough?

Anything that i could have forgot?