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.
With worn engine mounts, you will need to shell out lots of money on parts service or engine restoration if the damage is critical. Busted Mercedes Benz S550 motor and transmission mounts could bring about an automobile trouble; unexpected movements can lead to impaired gearbox and motor and engine leaks.ith worn engine mounts, you will need to shell out lots of money on parts service or engine restoration if the damage is critical. Busted Mercedes Benz S550 motor and transmission mounts could bring about an automobile trouble; unexpected movements can lead to impaired gearbox and motor and engine leaks.