Carburetor Adjustment-Series 37-50, 60, 65, 70 And; Stromberg Carburetor; Carter Carburetor - Cadillac 1937 LaSalle VVI Information

99
The construction of the coil itself is the same on
all series. In every case the ignition coil cover
must be removed and the ignition cable wire
disconnected at the coil before the ignition, coil
itself can be removed. T h e general procedure is
as follows:
1. Disconnect high tension wire at coil.
2. Disconnect p r i m a r y wire at coil.
3. Loosen clamp bolts holding coil to dash or
mounting bracket.
Note: Slide bracket toward rear off coil body
on 37-85 and 90.
4. Insert T o o l J-726 between coil body and
cover as shown i n Plate 41, F i g . 51. R e v o l v e
coil clockwise and cover counter-clockwise and
remove cover.
5. Disconnect ignition switch wire at coil.
Installation is the reverse of removal, except
that no special tools are required.
36. Carburetor Adjustment
Series 37-50, 60, 65, 70 and
75—Two
different
makes of carburetors were used o n the 37-series
V-8 engines. Stromberg carburetors were used
on all Cadillac V - 8 engines and both Stromberg
and Carter carburetors used on LaSalle V - 8
engines.
While the two makes of carburetors are very
similar in operation and performance, their funda-
mental design is different, and the follpwing
procedures are given to guide you in servicing
either make of carburetor.
Stromberg Carburetor
Idling Adjustment
1. R u n engine u n t i l it is thoroughly w a r m and
choke valve is wide open.
2. Set throttle stop screw so that car runs
approximately 6 m . p. h. in high gear on level
roacl. See Plate 42, F i g . 55.
3. Adjust the two idle adjustment screws so
that the engine runs smoothly without loping or
stalling at this speed. See Plate 42, F i g . 55.
Note: T u r n screws clockwise to lean the mixture
and counter-clockwise to enrich the
mixture. If a good idle is not obtained,
remove the idle adjusting screws and
check to make sure that no dirt has ;.;
accumulated around the adjusting screw
seats.
Float Level Adjustment
T h e float level should be set to Y% inch below
the' top surface of the float chamber.
This level corresponds to the lower level of
the sight p l u g when the engine is idling, and m a y
be checked without disassembling the carburetor.
Important: The float level can be checked only while
the engine is running. D o not, however,
start the engine while the carburetor
cover is removed because a backfire
might cause a serious fire or injury.
If the float level requires resetting, bend the
float lever arm to the desired position. T h i s
should not be necessary, however, unless the
carburetor has been tampered with or roughly
handled.
Automatic Choke Thermostat Adjustment
T o adjust the electrically-heated thermostat for
the automatic choke, proceed as follows:
1. Remove the thermostat case and bring
the temperature of the thermostat spring to
approximately 70°F. A t this temperature the
inside of the hook for the thermostat spring should
coincide with the zero m a r k i n g on the case.
Note: This step is very important and especi-
ally so in case a new thermostat or other
new parts have been installed for any
reason. One graduation on the thermo-
stat case should be allowed for each 5°
variation in temperature if the setting
is made at temperatures other than 7 0 ° F .
2. Install the thermostat case on the carburetor
so that the hook for the thermostat spring comes
in contact w i t h the p i n on the choke shaft, lever
without any tension when the choke valve is i n
the wide open position.
3. Check the zero location m a r k i n g on the
thermostat case which should now coincide w i t h
the marking on the carburetor body.
4. T u r n the thermostat case to the rich side
from the zero m a r k i n g on the case u n t i l the star
stamped during the original setting by the factory
is opposite the m a r k i n g on the carburetor body.
T h e n firmly tighten the retaining screws to hold
the adjustment.
Carter Carburetor
Idling Adjustment
T h e procedure given for making the idling
adjustment on the Stromberg carburetor will also
apply to the Carter carburetor. See Plate 42,
F i g . 56.
If any difficulty is encountered in securing a
good idle, the adjusting screws should be checked
to make sure that no dirt has accumulated around
the adjusting screw .seats or that the low speed
jet tubes are not clogged. T h e tubes should also
be seated air-tight in the body casting.
Float Level Adjustment >,
1. Remove air horn assembly and float bowl
cover and disengage metering rods by removing
metering rod arm p i n .
2. Invert float bowl cover, holding needle seat
away and float in horizontal position.
3. Measure distance between metal r i m for
cover gasket and nearest point of float, as shown in
Plate 43,-Fig. 59.
4. B e n d l i p of float lever if measurement shows
improper setting. T h e correct float level setting
is inch.
Note: Tool J-818-3 is convenient for measuring
this distance.