I am new to this board & I am having a problem with the oil pump of my 87 honda express. About two years ago the oil tank began leaking. My father decided to use mixed gas in the fuel tank too keep the parts lubricated. the oil tank was left dry. The pump was never disconnected. It began making a sucking sound about a year ago,now it is popping too. the cover on the oil pump pulls away when it pops. When it pops it seems loose power.Is there a way to fix this?