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.
2012 Jeep Wrangler: Rear Headrest Fail. February 25, 2013. Some time ago one of the headrest mounts on our Wrangler's rear seat broke. The fixture which locates the driver side headrest in the seat pulled free. The headrest can still be removed and inserted, but the mount is no longer fixed to the seat.