Radiator Cap - wsm wg972-e4 Workshop Manual

WG972-E4, WSM

[6] RADIATOR CAP

The pressure type radiator cap prevents differences
in pressure between the inside and the outside of the
radiator from deforming the radiator.
When the coolant temperature rises and the
pressure in the radiator increases above the specified
pressure, the pressure valve (1) opens to reduce the
internal pressure.
When the coolant temperature falls and a vacuum
forms in the radiator, the vacuum valve (2) opens to
introduce the air into the radiator.
(1) Pressure Valve (Opening
pressure 88 kPa
2
(0.90 kgf/cm , 13 psi))
1-M11
ENGINE
(2) Vacuum Valve
9Y1211108ENM0025US0
KiSC issued 07, 2015 A