A short while back there was a thread on how to pressure test an evaporator outside the car. I have a different method - vacuum testing. I use a Mighty-Vac with its supplied adapters, plug one end and draw a vacuum of 28 inches (maxed out for the Mighty-Vac). Pictures of the setup are available at the following site: http://community.webshots.com/album/173239561DMkJDW Bill Hubbell