Buick 1993 Century Owner's Manual page 200

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The coolant level should be at or above the "FULL
HOT" mark.
If it isn't, you may have a leak in the radiator hoses,
heater hoses, radiator, water pump or somewhere else in
the cooling system.
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CAUTION:
Heater and radiator hoses, and other engine
parts, can be very hot. Don't touch them. If
you do, you can be burned.
Don't run the engine if there is a leak. If you run
the engine, it could lose all coolant. That could
cause an engine fire, and you could be burned.
Get any leak fixed before you drive the vehicle.
If there seems to be no leak, check to see if the electric
engine f8n is
running.
If the engine is overheating, the f8n
should be running. If it isn't, your vehicle needs service.
How to Add Coolant to the Coolant Recovery lhnk
If you haven't found a problem yet, but the coolant level
isn't at or above "ADD:' add a 50/50 mixture of clean
water (preferably distilled) and a proper antifreeze at the
coolant recovery
tank.
(See "Engine Coolant" in the
Index for more information about the proper coolant
mix.)
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