On-Vehicle Inspection [09/2014 - 11/2017]: Procedure
WARNING: This page is about a different car, the 2017 Lexus RC 350, 2017 Lexus RC 300, 2016 Lexus RC 350, 2016 Lexus RC 300, and 2015 Lexus RC 350. 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.
*a Rubber Packing (1) *b Rubber Packing (2) *c Rubber Packing (3) *d Valve Seat - If there are water stains or foreign matter on the rubber packings (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 packing (3) and valve seat 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.
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 radiator cap sub-assembly.
- Measure the valve opening pressure.