On-Vehicle Inspection [12/2015 - 08/2016]: Procedure
WARNING: This page is about a different car, the 2016 Toyota Sienna. However, it is still accessible from the selected car via links, so may be relevant.
- CHECK RADIATOR CAP SUB-ASSEMBLY
- Measure the valve opening pressure.
- If there are water stains or foreign matter on rubber packings 1, 2 or 3, clean the part(s) with water and finger scouring.
- Check that rubber packings 1, 2 and 3 are not deformed, cracked or swollen.
- Check that 3 and 4 are not stuck together.
- Apply engine coolant to rubber packings 2 and 3 before using the radiator cap tester.
- When using the cap tester, tilt it to 30° or more above the horizontal.TEXT IN ILLUSTRATION
*1 Radiator Cap Tester *2 Radiator Cap *a 30° or more - Pump the cap tester several times, and check the maximum pressure*.
Pump speed
1 pump per second
*: Even if the cap cannot maintain the maximum pressure, it is not a defect.
Judgment Criterion
Item Specified Condition Standard value
(for brand-new cap)93 to 123 kPa (1.0 to 1.3 kgf/cm2 , 13.5 to 17.8 psi) Minimum standard value
(for used cap)79 kPa (0.8 kgf/cm2 , 11.4 psi) If the measured maximum pressure is less than the minimum standard value, replace the radiator cap sub-assembly.
- Measure the valve opening pressure.