On-Vehicle Inspection [04/2013 - 08/2015]: Procedure
WARNING: This page is about a different car, the 2015 Lexus IS 250 and 2014 Lexus IS 250. 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 the rubber packing (1), (2) or (3), clean the part(s) with water and finger scouring.
- Check that the rubber packings (1), (2) and (3) are not deformed, cracked or swollen.
- Check that the rubber packings (3) and (4) are not stuck together.
- Apply engine coolant to the rubber packings (2) and (3) before using the radiator cap tester.
- When using the radiator cap tester, tilt it upward 30° or more.
- Pump the radiator cap tester several times, and check the maximum pressure*1.
*1 Radiator Cap Sub-assembly *a Radiator Cap Tester *b 30° or more Pumping Speed
1 pump per second
*1: Even if the radiator cap sub-assembly cannot maintain the maximum pressure, it is not a defect.
Judgment Criteria
Item Specified Condition Standard value
(for brand-new cap)93 to 123 kPa (0.9 to 1.3 kgf/cm2 , 13.5 to 18.0 psi) Minimum standard value
(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 standard value, replace the radiator cap sub-assembly.
- Measure the valve opening pressure.