Chevrolet 1979 Light Duty Truck Owner's Manual page 69

•
DON'T TURN OFF THE ENGINE. INCREASE THE
ENGINE IDLE SPEED until it sounds like it's going about twice
as fast as normal idle speed. Bring the idle back to normal after
two or three minutes.
If the hot light still doesn't go off (or the temperature needle doesn't
start to drop}, NOW TURN OFF THE ENGINE and proceed as
follows.
•
Lift the engine hood. Look at the coolant level in the "see
through" coolant recovery tank. The coolant level should be
slightly below the Cold Level mark on the tank. If the coolant
appears to be "boiling, " wait until it stops before proceeding
further. (It should not be necessary to remove the radiator cap
to check the coolant level, and it can be dangerous if the engine
is still hot. See Caution below.)
CAUTION: To help avoid the danger of baing burned:
•
do not remove the coolant recovery cap while the coolant is
''boiling," and
•
do not remove the radiator cap while the angina and radiator are
still hot.
Scalding fluid and steam can be blown out under pressure if either cap
is taken off too soon.
•
If coolant level is low:
•
look for leaks at the radiator hoses and connections, heater
hoses and connections, radiator, and water pump. See that
the fan belts are not broken or off the pulleys and that the
fan turns when the engine is started.
•
add coolant to the coolant recovery tank.
If the coolant level in the coolant recovery tank is at the correct level
and the hot light still comes on, air may be trapped in the cooling
system. This may prevent coolant from retuJ,ll i ng to the radiator. In
this case, it may be necessary to add coolant directly to the radiator.
See "Coolant Replacement" in the "Service and Maintenance" section
of this manual. Follow steps 1 and 10 for the correct way to remove
the radiator cap and add coolant to the radiator.
After the red light is out (or the gage needle is out of the warning zone},
resume driving at
about ten minutes if the light does not come back on (or the needle
does not go back into the warning zone).
JACKING
CAUTION
T o avoid personal injury:
•
Follow jacking and stowage instructions.
•
The jack is designed for use only when changing wheels.
•
Never get beneath the vehicle when using this jack.
•
Do not start or run the e ngine while vehicle is on jack.
reduced speed. Return to normal driving after
a
3-5