Chevrolet Light Operator's Manual page 96

Engine Runs Hot. In case of a hot engine check the following.
1.
Check for lack of water
in
the cooling system.
CAUTION: In Calje the engine is very hot do not remove radiator
cap until it has cooled off iSOmeWhat as you may be severely
burned by the steam. Never put cold water in the cooling sy5tem
until the engine has cooled off as this may crack the cylinder head.
2. Check for lack of oil
in
the engine. Do not run the en·
gine without aU or serious damage will be done.
3. Check for loose or broken fan belt. As the fan belt also
drives the water pump the engine will get hot very quickly if
the belt is broken or slips excessively.
4. Anything in front of the radiator that restricts free flow
of air will also cause overheating. Make sure that the radiator
air passages are not restricted and· remove anything that might
restrict air flow.
5. Improperly set ignition timing or improperly adjusted
valves will cause overheating and at the same time cause poor
engine performance. Consult your local dealer for repairs.
Engine Noises. Certain fuels may produce a pronounced knock
or "ping" on acceleration only. Although
this
is annoying it
does not serio\lsly damage
the engine. It may be eliminated or
decreased by the use of highe'r octane fuel, retarding the oc·
tane selector setting or by having the engine tuned up.
H a pronounced noise is noted, check to see that there
is
normal oil pressure and that the engine is not running too hot.
Check for normal supply of oil in the engine. If you are unable
to correct the cause of the noise it is advisable to call a service
man or at least drive very carefully to the nearest dealer and
if the noise gets worse stop the engine and wait for assistance.
LIGHTS
All Lights Go Out. This would indicate trouble at the thermal
circuit breaker at the
ligh~
switch. The circuit breaker .is de·
signed to protect the lighting circuits in case of a short circuit
which would cause excessive current flow.
Tail or Stop Light Go Out. This is likely to
be
caused by a
burned out fuse in the individual circuit.
Remove fuse box cover. Inspect the two fuses carefully and
replace burned out or damaged fuse. Test circuit.
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