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.
We are lot hearing about engine seize in cars. In simple terms we can say that engine stops working due to some external or internal cause. But this would not give detailed explanation about engine seize. I started this thread after reading so many complaints of Honda, Skoda etc owners about engine failure in their car due driving in heavy rain/flash floods or so.