On-Vehicle Inspection

WARNING: This page is about a different car, the 2008 Lexus LS 600hL. However, it is still accessible from the selected car via links, so may be relevant.

CHECK RESERVE TANK CAP

Measure the valve opening pressure.

If there are water stains or foreign matter on O-ring 1, clean it with water and finger scouring.
Check that O-ring 1 is not deformed, cracked or swollen
Apply engine coolant to O-ring 1 and rubber packing 2 before using a radiator cap tester

Fig 1: Identifying Rubber Packing And O-Ring
Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002
When using the cap tester, tilt it 30° or more.

Pump the cap tester several times, and check the maximum pressure*

Pump speed: 1 pump per second

HINT:

* Even if the cap cannot maintain the maximum pressure, it is not a defect.

Fig 2: Checking Reserve Tank Cap

Courtesy of © TOYOTA, LICENSE AGREEMENT TMS1002

Judgment criterion

ITEM SPECIFIED CONDITION

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 (after using cap)	79 kPa (0.8 kgf/cm² , 11 4 psi)

If the maximum pressure is less than the minimum standard value, replace the radiator reserve tank cap

CHECK FINS FOR BLOCKAGE

Check that the radiator and condenser are not blocked with leaves, dirt, or insects Clean the hose connections.

If the fins are blocked, wash them with water or a steam cleaner.

NOTE:

If the distance between the steam cleaner and core is too close, the fins may be damaged.

Keep the following injection distance.

Standard injection distance

INJECTION DISTANCE SPECIFICATION

Injection Distance	Injection Pressure
300 mm (11.8 in.)	2942 to 4903 kPa (30.0 to 50.0 kgf/cm² , 427 to 711 psi)
500 mm (19.7 in.)	4903 to 7845 kPa (50.0 to 80.0 kgf/cm² , 711 to 1138 psi)

If the fins are bent, straighten them with a screwdriver or pliers.
Never apply water directly into the electric components.

Dry the fins with compressed air.