Cooling
System
Theradiator
filler
capislocatedattherighthandsideofthe
engineunderthehood.Thecapacityofthe
cooling
systems,
when
filled
tothecorrect
level
is5½gallons.Thecorrect
level
is
with
the
liquid
just
visible
inthecurveofthe
filler
neck.
When
thecarisdeliveredtotheowner,the
cooling
system
contains,inadditiontothewaterandwhateveranti-freezeis
used,a smallamountofa specialinhibitor
which
hasparticular
advantages
inreducingfoamingandretardingtheformationof
rustandscale,
thus
helpingtokeepthe
cooling
systemcleanso
that
it
will
better
performits
cooling
action.Itisnotnecessary
toaddtheinhibitoreachtimewateroranti-freezeisadded
Wheneverthe
cooling
systemisdrainedand
refilled,
however,it
is
recommended
that
a suitableinhibitorbeadded.Consult
your
DistributororDealerconcerningtheproperinhibitortouse.
Before
addinganti-freezeatthe
start
of
cold
weather,the
cooling
systemshouldbecleanedandthoroughlyinspectedto
make
sure
allconnectionsaretight.Itisadvisabletohavethe
systemthoroughlycleanedevery6000milesatanAuthorized
Cadillac-LaSalle
ServiceStation.Ifthisisnotpossible,a satis-
factory
cleaningmaybeobtainedbyusingthe
following
pro-
cedure.
Run
theengine
until
itiswarm;thenstoptheengineanddrain
theentiresystem.TheV-16enginehasonlyonedrainvalve,
located
justbelowthewaterpump.
After
the
liquid
hasdrained
off,
refill
the
cooling
system
with
hotwater,runtheenginefora
few
moments,anddrainthesystem.Repeatthisoperation
until
thewateriscleanwhenitisdrained.
In
cases
wheretheaccumulationofrustandscaleisso
great
that
thismethod
does
notcleanthesystemsufficiently,the
flush-
ing
operationshouldagainberepeated,usingonepintofsalsoda
andonequartofkerosene,andrunningtheenginefor
half
an
hour.Caremustbetaken,ofcourse,
that
the
cooling
systemis
[20]
thoroughlyflushedafterthisoperationtocleanoutall
traces
of
the
solution,
and
that
noneofthesolutionisallowedtoreachthe
car
finish.
Anti-Freeze
Theavailablecommercialmaterialsforpreparinganti-freezing
solutionsforautomobileradiatorsaredenaturedalcohol,meth-
anol
(syntheticwoodalcohol),
distilled
glycerine,andethylene
glycol.
Denaturedalcoholandmethanolsolutionshavebeenthemost
generallyusedanti-freezingsolutions.Denaturedalcoholand
methanolare
widely
distributed,a/Fordprotectionagainst
freezing,
andarenotinjurioustothematerialsusedinthe
cooling
system.
Therearetwoprincipalobjectionstodenaturedalcoholand
methanol.Thesematerialsarelostbyevaporation,especially
on
heavyruns,andunlessthesolutionincheradiatoris
tested
periodically
andsufficientanti-freezeaddedtoreplacetheloss
by
evaporation,themotororradiator,orboth,are
likely
tobe
damagedbyfreezing.Thecar
finish
isdamagedbycontact
with
denaturedalcoholormethanolsolutionsorvapors,andany
material
accidentally
spilled
onthe
finish
shouldbeflushedoff"
immediately
with
a largequantityofwater.
Distilled
glycerineandethylene
glycol
solutionsare,in
firsr
cost,moreexpensivethanalcoholbut,astheyarenotlostby
evaporation,onlywaterneedbeaddedtoreplaceevaporation
losses.Anysolutionlostmechanically,however,eitherby
leakageorfoaming,mustbereplacedbyadditionalnewanti-
freezing
solution.Thesesolutions,underordinaryconditions,
arenotharmfultothecar
finish.
Theprincipalobjectionstoglycerineandethylene
glycol
are
thetendencyof
these
solutionstoloosenrustandscale,
which
form
inthewater
passages
ofthecylinderblocksand
heads,
and
the
difficulty
ofsecuringandmaintainingtight,leakproofcon-
[21]