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.
To put it in short, some '05s are having issues with the motor mounts giving in at the frame due to bad welds. I hadn't seen a thread on this so I figured it should be posted. You '05 guys should go check your mounts. Heres a few of the threads with more details/pics/list of uses whose frames have failed. '05 Tacoma Motor Mount/Frame Failure List. Cracked Frame 2005 Taco. Motor Mount Ripped From Frame.