Coolant Quality; Coolant Leakage; Coolant Level (Engine Cold); Preparation - Mazda MX-5 1990 Workshop Manual

E
ENGINE COOLANT
PREPARATION
SST
49 9200 145 OlY
Adapter set,
radiator cap
tester
E-4
ENGINE COOLANT
For inspection of 49 9200 146
(\
For inspection of
cooling system cooling system
pressure Adapter A pressure
(Part of
49 9200 145)
05UOEX-005
INSPECTION
Warning
• Never remove the radiator cap while the engine is
hot.
• Wrap a thick cloth around the cap when removing it.
• When removing the radiator cap, loosen it slowly
to the first stop until the pressure in the radiator is
released, and then remove it.
05UOEX-033
Coolant Level (Engine cold)
1. Verify that the coolant level is near the radiator filler neck.
2. Verify that the coolant level in the coolant reservoir is be-
tween the FULL and LOW marks. Add coolant if necessary.
Coolant Quality
1. Verify that there is no buildup of rust or scale around the
radiator cap or radiator filler neck.
2. Verify that coolant is free of oil.
Replace the coolant if necessary.
Coolant Leakage
1. Connect a radiator tester (commercially available) and the
SST to the radiator filler neck.
2. Apply 103 kPa (1.05 kg/cm
2
,
15 psi) pressure to the
system.
3. Verify that the pressure is held.
If not, check for coolant leakage.
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