Cadillac 1933 V8 Operator's Manual page 38

arrangements should be made to have the battery charged from
an outside source p e r i o d i c a l l y to insure dependable operation }
throughout the w i n t e r months.
S p a r k P l u g s
The spark plugs provide the spark w h i c h ignites the gasoline
mixture i n the cylinders, and s m o o t h and economical engine
performance depend largely upon their efficiency. T h e accumula- |
t i o n o f carbon and improper gap setting are generally the cause \
of inefficient spark p l u g operation. T h e i r efficiency can be in- '
creased i n such cases b y cleaning out the carbon and b y resetting •
the gap.
T o clean carbon from the insulator, fill the l o w e r part o f the
p l u g w i t h a l c o h o l , l i q u i d metal p o l i s h or equal parts o f ammonia >
and water and a l l o w it to stand for a few seconds. R u b the carbon
from the insulator w i t h a w i r e covered w i t h one thickness of
c l o t h ; then w i p e it clean and d r y before replacing the spark plug
in the engine.
Whenever spark plugs are reinstalled i n the engine, the firing j
points should be tested to make sure they are properly spaced, j
The gap should be .025 to .028 inches, measured w i t h a feeler ;
gauge. A l l adjustments of the gap should be made by m o v i n g the )
side w i r e o n l y . j
C o o l i n g S y s t e m
The radiator filler
cap is located on the
r i g h t hand side o f the
engine under the h o o d .
The capacity o f the
c o o l i n g system is 6 ½
gallons w h e n filled to
a point about 1 ½
inches below the top
of the filler neck. W h e n
Fit. 26. The radiator filler cap is on the right
hano side of the car under the hood.
[44]
the car is delivered to the owner, the c o o l i n g system contains, i n
addition to the w a t e r and whatever anti-freeze is used, a s m a l l
amount of a special i n h i b i t o r w h i c h gives the c o o l i n g l i q u i d a
milky appearance. T h i s i n h i b i t o r has particular advantages i n
reducing foaming and retarding the formation of rust and scale,
thus helping t o keep the c o o l i n g system clean so that i t w i l l
better perform its c o o l i n g action. It is not necessary to add the
inhibitor each time water or anti-freeze is added. Whenever the
cooling system is drained and refilled, however, i t is recommended
that }4 ° f a p l n t : (about 6 ounces) o f a suitable i n h i b i t o r be added.
Consult y o u r D i s t r i b u t o r s or Dealer concerning the proper i n -
hibitor to use.
In freezing weather a suitable anti-freeze s o l u t i o n , such as those
described o n page 26, s h o u l d be used. T h e i n h i b i t o r , a l t h o u g h
it has no anti-freezing qualities i n itself, w i l l blend satisfactorily
with any approved anti-freeze but s h o u l d not be used w i t h any
solution already c o n t a i n i n g a s i m i l a r i n h i b i t o r (see page 28).
Allowances must, of course, be made w h e n testing the c o o l i n g
solution for the effect the i n h i b i t o r has on its specific g r a v i t y .
Before the start o f cold weather, the c o o l i n g system should be
cleaned and t h o r o u g h l y inspected to make sure a l l connections
are tight. If the i n h i b i t o r is
used, this cleaning w i l l suffice
for the entire year; otherwise
it is advisable to clean i t
thoroughly every 6000 miles,
using the reverse flow method
which is standard at a l l A u t h o -
rized C a d i l l a c - L a Salle Service
Stations.
If this is not possible, a satis-
factory cleaning, a l t h o u g h not
as effective as the reverse flow-
method, may be obtained by using the f o l l o w i n g procedure:
Run the engine u n t i l the opening o f the radiator shutters
indicates that the engine is w a r m ; then stop the engine and open
145]
Fig. 27. The cooling system may be
drained by opening the one valve.