Medal For Excellence

Medal For Excellence

Tuesday, April 14, 2015

COOLANT TEMPERATURE WARNING LIGHT

Most vehicles have heat sensor to engine operating temperature indicator
light
If light comes on (or temperature gauge goes into red danger zone) 
coolant is 250°F to 258°F (120°C to 126°C)

If coolant temperature warning light comes on, follow these steps
Step 1: Shut off air conditioning and turn on heater. Set blower speed to high.
Step 2: Shut engine off and let it cool.
Step 3: Do not remove radiator cap while engine is ho 
Step 4: Do not continue to drive.
Step 5: If engine does not feel or smell hot, problem may be faulty hot light sensor or gauge.

Common Causes of Overheating
Low coolant level
Plugged, dirty, or blocked radiator
Defective fan clutch or electric fan
Incorrect ignition timing (if adjustable)
Low engine oil level
Broken fan drive belt
Defective radiator cap
Dragging brakes
Frozen coolant (in freezing weather)
Defective thermostat
Defective water pump (impeller slipping on internal shaft)
Blocked cooling passages in block or cylinder head(s)

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