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COOLING SYSTEM 3-13
Check the condition of the valve spring [B], and the top
and bottom valve seals [A] of the radiator cap.
If any one of them shows visible damage, replace the cap.
Wet the top and bottom valve seals with water or coolant
to prevent pressure leaks.
Install the cap [A] on a cooling system pressure tester [B].
Watching the pressure gauge, slowly pump the pressure
tester to build up the pressure. The gauge hand must
remain within the relief pressure range in the table below
at least 6 seconds. Continue to pump the tester until the
relief valve opens, indicated by the gauge hand flicking
downward. The relief valve must open within the s pecified
Radiator Cap Relief Pressure:
108 ∼ 137 kPa (1.1 ∼ 1.4 kgf/cm², 16 ∼ 20
If the cap cannot hold the pressure, or if the relief pressure
is too high or too low, replace the cap with a new one.
Filler Neck Inspection
Check the radiator filler neck for signs of damage.
Check the condition of the top and bottom sealing seats
[A] in the filler neck. They must be smooth and clean for
the radiator cap to function properly.
Water Hoses, B reather Ho s e Inspection
In accordance with the Periodic Maintenance Chart,
visually inspect the hoses [A] for signs of deterioration.
Squeeze the hose. A hose should not be hard and brittle,
nor should it be soft or swollen.
Replace any damaged hose.
Water Hoses, Breather Hose Installation
Install the water hoses or breather hose being careful
to follow the performed bends (see General Information
chapter). Avoid sharp bending, kinking, flattening, or
Tighten the hose clamps securely.