OK, no squishing then.   Just start it up cold, run it just long enough to pump them up, measure the lash, then wait a while and see if the lash grows.  Of course, a true mechanic would bill out the time that you sit, wait and watch for that lash to grow.  A 
great mechanic would do several cars at the same time and bill the watch and wait time to all of the owners, with no 
pro rata discount, of course.
