Radiator Test

WARNING: This page is about a different car, the 2008 Acura TSX, 2007 Acura TSX, 2006 Acura TSX, 2005 Acura TSX, and 2004 Acura TSX. 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.
Check for engine oil in the coolant and/or coolant in the engine oil.