Definition of quantal. 1  1 [Latin quanti how many, plural of quantus] : of, relating to, or having only two experimental alternatives (such as dead or alive, all or none) 2  2 [quantum] : of or relating to a quantum.
3. Engine movement. Another symptom of bad or failing engine mounts is an engine that moves in the engine bay. If the engine mounts are in good condition, they should be able to secure the engine firmly in the engine bay.
Once mounted, this component allows a certain amount of rotation so it could dampen the shock that the engine and transmission parts receive. It also aligns various linkages, making it essential to the transmission system. With the many roles it plays, it's surprising how many people take this mount for granted. Worse, a car motor and transmission mount gets damaged easily as heat, pressure, and toxic chemicals will eventually wear it out.