Page text (OCR transcript)
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
