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.
Misalignment. Securing a motor not only fastens an engine, but aligns it, meaning that the engineâs height is ensured to be equal on all sides. If the motor mounts are in fact bad, the engine will sag and droop to one side. Again, there may be noises emitting from the engine that does not sound quite right.Check on the engine and inspect to see if the engine is tilted. If so, the mounts are bad.However, if the engine is tilting excessively, an engine block may result. In other words, your car may stop in its tracksâcheck the engine for drooping, and, if so, replace any and all motor mounts as necessary.heck on the engine and inspect to see if the engine is tilted. If so, the mounts are bad. However, if the engine is tilting excessively, an engine block may result. In other words, your car may stop in its tracksâcheck the engine for drooping, and, if so, replace any and all motor mounts as necessary.