I was doing the valve springs with the head on using compressed air to hold them up and as I was putting spring back on the cylinder moved down and dropped the valve and now the cylinder is at the bottom with the valve down there, Ive pretty much prepared to take the head off now but just going to ask before I do if anyone has any ideas. <div><br></div><div>And also if Im taking head off what head gasket should I go for, stick with the stock rb25det or aftermarket metal one and what thickness?</div>