ENGINE – COOLING SYSTEM EG–343 Radiator Cap Tester 30° or More Radiator Cap CO1242 200570 2. INSPECT RADIATOR CAP NOTICE: When performing steps (a) and (b) below, keep the ra- diator pump tester at an angle of over 30° above the horizontal. (a) Using a radiator cap tester, slowly pump the tester and check that air is coming from the relief valve. Pump speed: 1 push/3 seconds or more NOTICE: Push the pump at a constant speed. If air is not coming from the relief valve, replace the radiator cap. (b) Pump the tester several times and measure the relief valve opening pressure. Pump speed: 1st time 1 push/1 second or less 2nd time or more Any speed Standard opening pressure: 93–123 kPa (0.95–1.25 kgf/cm2, 13.5–17.8 psi) Minimum opening pressure: 78 kPa (0.8 kgf/cm2, 11.4 psi) If the opening pressure is less than minimum, replace the ra- diator cap. P11506 3. INSPECT COOLING SYSTEM FOR LEAKS (a) Fill the radiator with coolant, and attach a radiator cap tester. (b) Warm up the engine. (c) Pump it to 147 kPa (1.5 kgf/cm2, 21.3 psi), and check that the pressure does not drop. If the pressure drops, check the hoses, radiator or water pump for leaks. If no external leaks are found, check the heat- er core, cylinder block and cylinder head. 4. REINSTALL RADIATOR CAP