Checking should include
- parking the vehicle on level ground
- checking the oil before starting; level should be between add and full marks on the dipstick
- inspecting the oil condition (e.g., gritty, burnt smell, discolored, milky)
- taking an oil sample, if scheduled
- inspecting the seal or O-ring at the top of the dipstick.
ASE 2: I. Diesel Engines: D. Lubrication Systems (P-1)
Process/Skill Questions:
- What problems would over-filling a crankcase with oil cause?
- What is the notable sign of a worn dipstick seal?