Hydraulic Lifters For Cars. It can be possible that the lid of your trunk fails to stay open. Because oil is a liquid and incompressible, when the lifter is operating it appears like a solid lifter.
Compared to car lifts that use different other mechanisms, hydraulic car lifts are cheaper to install and it occupies less space. The hydraulic lifter, situated between the camshaft and each engine's valve, is a hollow steel cylinder encasing an internal piston. It can be possible that the lid of your trunk fails to stay open.