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COOLING SYSTEM 3-13
Radiator
Cap Inspection
•
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
range.
Radiator Cap Relief Pressure:
Standard:
108 ∼ 137 kPa (1.1 ∼ 1.4 kgf/cm², 16 ∼ 20
psi)
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
twisting.
•
Tighten the hose clamps securely.