On-Vehicle Inspection [11/2021 - ]: Procedure
WARNING: This page is about a different car, the 2024 Lexus IS 500, 2023 Lexus IS 500, and 2022 Lexus IS 500. However, it is still accessible from the selected car via links, so may be relevant.
- INSPECT RESERVE TANK CAP
- Measure the valve opening pressure.
*a O-ring *b Rubber Packing - If there are water stains or foreign matter on the O-ring, clean it with water and finger scouring.
- Check that the O-ring is not deformed, cracked or swollen.
- Apply engine coolant to the O-ring and rubber packing before using a radiator cap tester.
- When using the radiator cap tester, tilt it upwards 30° or more.
*1 Reserve Tank Cap *a Radiator Cap Tester *b 30° or more - Pump the radiator cap tester several times, and check the maximum pressure.*1
Pump Speed
1 pump per second
HINT:
*1: Even if the reserve tank cap cannot maintain the maximum pressure, it is not a defect.
Result
Item Specified Condition Standard pressure
(for brand-new cap)93 to 123 kPa (0.9 to 1.3 kgf/cm2 , 13.5 to 18.0 psi) Minimum pressure
(for used cap)79 kPa (0.8 kgf/cm2 , 11.5 psi) If the maximum pressure is less than the specified pressure for the minimum pressure, replace the reserve tank cap.
- Measure the valve opening pressure.