COOLING SYSTEM TESTS
It is often
necessary to check the cooling system for cooling system problems. Cooling system problems
can be grouped into three general categories:
- COOLANT
LEAKS—crack or rupture, allowing pressure cap action to push coolant out of the
system.
- OVERHEATING—engine
operating temperature too high, warning light on, temperature gauge shows hot, or coolant
and steam is blowing out the overflow.
- OVERCOOLING—engine
fails to reach full operating temperature, engine performance poor or sluggish.
To diagnose
and repair cooling system problems, perform several tests. These tests include the
following—cooling system pressure test, combustion leak test, thermostat test, engine
fan test, and fan belt test. |
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