1938 LaSalle Production - GM Heritage Center

22
Cadillac-LaSalle Preliminary Service Information
shutter linkage extends through a tube in the
upper tank, as shown in Fig. 22.
The pressure-operated vent and overflow, with
the familiar double catch bayonet type filler cap,
Fig. 22. Radiator thermostat connections, series 38-90,
and rod adjustment, all series.
is continued on all 38-series cars. The pressure
required to vent the system is, however, several
pounds higher (6¼ to 7½ lbs.) on the 38-90 than
on the other series cars, (3½ to 4½ lbs.). Because
of this, the 38-90 filler cap, which is chrome
plated for easy identification, is not interchangeable
with the V-8 caps and is designed so that it
cannot be installed on the V-8 radiators.
The radiator core can be removed from all
38-series cars without removing the radiator casing.
On V-8 cars it is necessary only to remove the air
cleaner and the sheet metal shroud above the core,
and remove the cap screws holding the core in
place. On V-16 cars, the ignition coils, the fuel
pumps and the fan must also be removed, and the
distributor heads taken off before the core can be
lifted out.
The only other change in service operations on
the radiator is in the adjustment of the shutter
control rod. This rod is now threaded on the
inner end, and should be adjusted so that there is
fs-inch bind at the shutter end. This adjustment,
which is similar to that required by 36-series and
previous Cadillac shutter controls, is illustrated in
Fig. 22.
Lubrication
38-50, 60 38-65, 75 38-90
Engine Lubrication:
Crankcase capacity 7 qts. 7 qts. 11 qts.
Engine oil, Summer grade SAE 20, 30 SAE 20, 30 SAE 20, 30
Winter grade 20-W, 10-W 20-W, 10-W 20-W, 10-W
Transmission capacity 2½ pts. 2½ pts. 2½ pts.
Lubricant SAE 90, SAE 90 EP SAE 90, SAE 90 EP SAE 90, SAE 90 EP
Rear axle capacity 5 pes. 6 pts. 6 pts.
Lubricant SAE 90 Hypoid SAE 90 Hypoid SAE 90 Hypoid
Two changes have been made in the engine oil "The proper selection of a crankcase oil will add
recommendations for the 38-series, aside from the much to the performance, reliability, economy and
V-16 oil capacity as given above. long life of your engine.
The first of these is an extra oil change at 1 000 "During the first 1000 miles use the oil that
miles. The od originally m the engine should be
w a s i n t h e* c r a n k c a s e w h e n t h e c a r w a s d e l i v e r e d
.
changed when the car has been driven 1,000 miles
w h e n k J s n e c e s t o a d d o j ] d u r i
^
; d
and changed again at the 2,000 mile mark, and
u s £ Q o t h i t h a n w u
f P
every 2,000 miles thereafter. This additional oil
2 Q. W {n J mmcr c h (hc u & end f
change will assure exceptionally clean oil for the
1 Q 0 Q m ij e s
&
new engine.
The other new recommendation is for the use of
i "Break-in" oils or compounds
N o T E
SAE 20 and 30 grades in summer rather than
a r e
entirely unnecessary. They should
SAE 30 and 40 grades. This is in line with a
f u s e d u n d e r an >' circumstances uneeneral
n o t b
trend toward the use of lighter engine oils,
the supplier can furnish satisfactory
I e s s
and in experimental use it has proved most satis- P r o o f t h e
f
^ compound contains no
factory.
harmful ingredients.
"After the first 1000 miles the crankcase oil
should be selected to give the best performance
under your individual climatic and driving condi-
tions.
These recommendations are included in the new
engine lubrication write-up in the owner's manual.
Every service man should be familiar with this
write-up, which is as follows: