OIL-CHANGE MEANS FOR INTERNAL COMBUSTION ENGINES

摘要

A method of replacing oil in an internal combustion engine sump (20) comprises connecting a riser-tube (10) in fluid communication with the interior of the bottom of the sump (20) so that the riser-tube (10) extends to a level above the operational oil level in the sump (20). A pump unit can operate in conjunction with the method and comprises a flexible hose (16) adapted for connection to the riser-tube (10) and a pump (18) connected to the hose (16), at least one container (26) for clean oil and at least one separate container (30) for dirty oil and fluid valve means (24) connected between the hose (16) and the containers (26, 30) operable to draw dirty oil from the sump (20) via the riser-tube (10) and feed it to the container (30) for dirty oil.