I have an 89 V6 4x4 pickup and I've noticed a gas smell the past few days, so after checking into it, I noticed that its coming from on top the tank from a small clear round plastic piece that sits on top the sending unit. I just use it for a farm truck, so is there an epoxy or type of leak fix that I could just put on it to repair it. Its not a steady leak, but more of a mist. Any info would be great. Thanks