Valve Adjustment

[Barefoot]

I've always wondered how a shop cools down an engine to the proper temp. in order to be able to perform an adjustment. Is there a maximum temperature that it can be performed at? What is the definition of "completely cool" engine?

I've always just let the car sit overnight (usually on a friday), and just perform the valve adjustment first thing in the morning before i even crank the car up.

-jonathan

at my shop i use a big ass fan blowing directly on the motor for about 2-3 hours. ive worked at some shops that never cooled the motor.