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.
The most common symptom of a seized engine is a complete engine failure. Vehicles with seized engines make loud clunking noises when turning the ignition. The vehicleâs electronics, heater and lights work, but the engine sputters and fails to start. Although the engine seizes and becomes inactive, the starter continues to crank the engine when the ignition is turned. The starterâs continued activity puts strain on the electrical components of the vehicle. This results in smoking and overheating of the electrical wires in the vehicle.