Cadillac 1933 V8 Operator's Manual page 26

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long days of summer. All this means that the battery must be j
ready for increased demands. }
It is a good plan in preparing for the winter season, therefore, f
to see that the battery is fully charged, that the battery con- f
nections are clean and tight, and that the charging rate is sufficient f
to take care of the requirements of the system. At the same time,
the spark plugs, the contact points and the ignition timing should \
be checked to assure easy starting and smooth performance. '
G a s o l i n e S y s t e m \
A small amount of water in the gasoline system during warm
weather has little or no effect on the running of the engine. In
freezing weather, however, even a small amount of water may
freeze and stop the entire flow of fuel to the carburetor. It is <
important, therefore, to clean the filter and the strainers in the
gasoline system before the start of cold weather. (See page 46.)
It is also advisable to check the adjustment of the carburetor
and the operation of the choke control.
S t a r t i n g t h e E n g i n e
C h o k e B u t t o n ,
Gasoline does not vaporize as readily in cold weather as in
warm weather and in order to supply the cylinders with a gaseous
mixture rich enough to be ignited, the proportion of liquid
gasoline to air must be increased. This is accomplished by the
greater use of the choke control.
For cold weather starting, pull the choke control button all *
the way out until the engine starts. After the engine starts push
the control button part way in. Experience will show the correct
place to set the control, which will depend to some extent on the
temperature. As the engine warms up the control button should
be pushed further in until it has been pushed all the way in. The
choke should not be left out any longer than necessary. ^
P o s i t i o n o f T h r o t t l e H a n d L e v e r
The correct position of the throttle hand lever for starting in
cold weather is the same as for starting under other conditions,
that is, about one-fourth the way down from "close." In warm
weather, however, the lever may be returned to the idling position
almost as soon as the engine is started. In cold weather the
throttle must be left slightly open until the engine becomes warm.
P r i m i n g t h e C a r b u r e t o r
In extremely cold weather the carburetor may be primed by
quickly depressing and releasing the accelerator pedal a few times.
This procedure forces a larger quantity of gasoline into the
mixing chamber and provides a richer mixture. The carburetor
should never be primed in warm weather or in cold weather when
the engine is warm. Excessive priming at any time is likely to
make starting difficult rather than easy.
Use o f S t a r t e r
It is a good plan to disengage the clutch during the cranking
operation in winter weather to relieve the strain on the battery.
With the clutch disengaged the starter is not called upon to turn
the transmission gears which are immersed in lubricant. At
ordinary temperatures the resistance created by the gears turning
in the lubricant is negligible, but in cold weather, when the
lubricant is stiffened considerably, the strain is sufficient to retard
the cranking speed and increase the demand on the battery.
Use o f t h e A c c e l e r a t o r B e f o r e E n g i n e i s W a r m
In cold weather, after the engine is started and before it has run
long enough to become warm, the engine cannot deliver its normal
power and should not be called on to do so. In accelerating the
engine to start the car and in accelerating the car after the trans-
mission is in gear, the throttle should not be opened too suddenly
or too far. This merely invites "popping back'' in the carburetor
and an increase in the amount of excess unvaporized gasoline in
the combustion chamber. Unvaporized gasoline in the cylinders
washes the oil off of the pistons and cylinder walls, leaving the
surface unprotected and open to scoring.
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