6.6 LITER DIESEL. Dipstick seal. A component which prevents a leak or provides a Sealing surface at the Engine Oil Dipstick. An O-Ring which prevents fluid from leaking between the Dipstick Tube and its mounting area. Dip Stick. Dip Stick to Tube. Dip Stick Tube. Dipstick. Dipstick Tube. Engine Oil Dipstick O-Ring. Engine Oil Dipstick Tube O-Ring. Engine Oil Dipstick Tube Seal. Tube to Oil Pan. Tube to Oil Pan. Automatic Transmission O -. Engine O -. Guide o -. Included with: Dipstick, Dipstick Tube, Guide Tube, Level indicator, Oil Tube, Tube, Upper & lower Oil Tube.