Originally posted by qtiger
There's a little screw that you move up and down to adjust spacing of your valves, then you hold that setting steady with a nut.
If your car was out fast, that most likely means they just popped off your valve cover and deemed that everything was within specs. Which is a little 
because those readings are not accurate when the car is warm.
:ugh: no, not that fast...More like it was brought in the morning and out by noon or so..It was there for a good 5 hours or so..