1. Remove the radiator cap, fill the radiator with engine coolant, and then install the tester to the installation position of cap.
2. Apply a pressure of 157 kPa (1.6 kg/cm2, 23 psi) to the radiator and check the following points:
• Leakage from the radiator or its vicinity
• Leakage from the hose or its connections
CAUTION:
• Engine should be turned off.
• Wipe engine coolant from check points in advance.
• Be careful of engine coolant from spurting out when removing the tester.
• Be careful not to deform the filler neck of radiator when installing and removing the tester.