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COOLANT LEAK CHECK
GENERAL
Y25CGOA
1. Loosen the radiator cap.
2.
Confirm that the coolant level is up to the filler neck.
3.
Install a radiator cap tester to the radiator filler neck and
apply
150
kPa
(21
psi,
1.53
kg/cm
2 )
pressure. Hold for two
minutes in that condition, while checking for leakage from
the radiator, hose or connections.
CAUTIONS
1) Radiator coolant may be extremely hot. Do not open
the system while hot, or scalding water could spray
out causing personal injury. Allow vehicle to cool
before servicing this system.
2)
Be sure to completely clean away any moisture from
the places checked.
3) When the tester is removed, be careful not to spill any
coolant from it.
4)
Be careful, when installing and removing the tester
and when testing, not to deform the filler neck of the
radiator.
4.
If there is leakage, repair or replace the appropriate part.
Radiator cap tester
25YOOl
RADIATOR CAP PRESSURE TEST
Y25CHOA
1.
Use an adapter to attach the cap to the tester.
2.
Increase the pressure until the indicator of the gauge stops
moving.
Main valve opening pressure
.
74-103
KPa
(0.75-1.05
kg/cm
2 ,
10.7-14.9
psi)
Limit
65 KPa (0.66 kg/cm
2 ,
9.2
psi)
3.
Check that the pressure level is maintained at or above the
limit.
4.
Replace the radiator cap if the reading does not remain at
or above the limit.
25YOO2
NOTE
Be sure that the cap is clean before testing, since rust or
other foreign material on the cap seal will cause an
improper indication
1.
Measure the specific gravity of the coolant with a hydrome-
ter.
2.
Measure the coolant temperature, and calculate the concen-
tration from the relation between the specific gravity and tem-
perature, using the following table for reference.
SPECIFIC GRAVITY TEST
Y25CIOA
Hydrometer - - - I
25-5
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