[GSFMECH]

Looks like the adjustment was too tight and the retainer bottomed out against the valve guide/ seal and this is what bent the pushrod. You need to get a compresion tester fitting and screw into your spark plug hole and connect an air line to it. Be sure both valves are backed off and put air into the cylinder. Be sure you are out of the way of the fan etc. as the engine may turn over until the piston gets to the bottom of the stroke. Now listen for air leaking out of the intake or exhaust. If you have no leaks you are good, but if you have air leaking you are going to have to pull the head to replace bent valves. If there are no leaks you can replace the seal on the engine without pulling the head.You can pick up a spring compressor that you can use to remove the valve spring and replace that broken seal by using the compressed air in the cylinder to hold the valve closed. They have lever type in most parts stores but Moroso makes a real good lever type compressor that screws onto the rocker arm stud. I have even threaded small rope into the cylinder before and rolled the engine over until the valve is held closed before but the air in the cylider works best. Good luck and don't lose hope this is fixable.
Mike