hello, I have a 85 4runner , the fuel damper is leaking from the bottom where a screw looks like it fell out , I havnt taken it out yet . so I went to kragan auto and bought a new one , and when I opened it up , it doesnt have a screw on the bottom and it looks like it was just drilled out , is this going to work ? or is this the wrong one . I havnt looked in the original one thats on there to see if there is something else like a diaphragm or something . thanks