Ok so my car breaks down once a week. Eventually it will all be fixed! So I drove about 30 miles on sunday and the car died. it lost spark. It also had a strange noise before it lost power but I thought maybe it was a miss. Towed it home replaced the coil and it fired back up but with a loud knock. I shut it down right away. I'm hopeing I was just paranoid because it was late and the garage echos and it does have some valve noise before the oil gets going. I pulled the side cover and the valve cover everything looks good. with the spark plugs pulled it rotates with no sign of anything making contact. How easy is it to tell if a push rod is bent? I'm gonna try running it without the water pump to see if my noise was there. I know I should drop the pan but I dont want to do that unless I'm ready to pull the bearing and replace the rear seal. Could I make it worse if I try and run it again, I'm sure theres always that chance. I'm also gonna check the compression when I get home.