I pulled the pass. valve cover tonight, to my amazement the exhaust spring was broken on the middle cylinder. I wonder if I can pressurize the cylinder and swap the spring w/o pulling the head? I hope the overhead cam will not be in the way. I feel like pulling the head anyway to make sure the valve didn't get smacked. The down side is that I would need to pull the front cover off to get the chain out. Any idea's?