1. Attach the radiator cap to tester.
2. Increase pressure until the tester gauge needle stops. Radiator cap is functioning properly if it holds the service limit pressure for 5 or 6 seconds. Replace the radiator cap if it is opened under a pressure less than the service limit value.
Coolant filler tank side
Standard:
93 — 123 kPa (0.95 — 1.25 kg/cm2, 14 — 18 psi)
Service limit:
83 kPa (0.85 kg/cm2, 12 psi)
Radiator side
Standard:
122 — 152 kPa (1.24 — 1.55 kg/cm2, 18 — 22 psi)
Service limit:
112 kPa (1.14 kg/cm2, 16 psi)
CAUTION:
• Be sure to remove foreign matter and rust from the cap in advance. Otherwise, results of pressure test will be incorrect.
• Do not confuse the cap of coolant filler tank and cap of radiator.