Radiator Test

WARNING: This page does not describe the selected car, but rather 6 other vehicles, including the 2004 Honda Odyssey, 2003 Honda Odyssey, 2002 Honda Odyssey, 2001 Honda Odyssey, and 2000 Honda Odyssey. However, it is still accessible from the selected car via links, so may be relevant.

Wait until the engine is cool, then carefully remove the radiator cap and fill the radiator with engine coolant to the top of the filler neck.
Attach the pressure tester (A) (commercially available) to the radiator and apply a pressure of 93-123 kPa (0.95-1.25 kgf/cm² ,14-18 psi).

Fig 1: Attaching Pressure Tester To Radiator
Courtesy of AMERICAN HONDA MOTOR CO., INC.
Inspect for engine coolant leaks and a drop in pressure.
Remove the tester and reinstall the radiator cap.