Correction Of Air And Water Leakage; Radiator Cleaning Procedure - Cadillac 54-6219 1954 Shop Manual

li-S
ENGINE COOLING
g
[nna I radiator hoses.
10. lnstai generator drive bel Ce ad adjust,
expialni in Section II, Note 24.
12
Vacuum Tests for
Radiator Clogging
1
Remove radiator 1111cr cap end attach VacuulIl
gaug1 Cr
a
mercury
manometer to
radiator bran'
fittLng.
Not'::
I' in necessary to install either a
fitting with a i/I to I /
ijic]
pipe rcd:ierng
bushing or
a plain tube fitting to avoid air
leakage at this point.
2.
Run engi an until so] urion has Ccc a
I':!
IC bcLween L&lrl: and I i00P and make certain Thai
her mostat valve is open.
3, Accelerate
engine to a speed of about 10
R.F.M. and take 1-eading on vaci,Lliu gsugc or
mercury manuneler.
If vac!.J,Jn-, exceeds 5'' of
mercury, ti-in
is evidence of at least partiaL
radiator cloing or resirlcUun.
NOTE: A Qudck check for a reatrictod ruble
tot "lay be made by removing the radiator c.up
and earming up the engine. If tIle engine speed
is
increased
from idle Lo 2111 R.P.M.. the
cuohent Ieve I in the upper radiator should not
rise appreciabLy. if the bed
rises or calanL
overflows from the filler neck when the speed
is arreased. it indicatee a restricted radiator.
13 AirandGasket
Leakage Tests
The following test procedure will show tIio pres
enco of combustion chamber leakage at cylinder
head gaskets and aIr leakage at suction side of
Water pultip.
F: Ii cooling sysrem complerely. no: leave
any air a. expa as ion epace
as in jiornial fill log
1
install a radiator
cap without a pressure
valve, or a cap in which nresure valve has been
drilled oat.
3. Attach a length nf
to
'lie radiator
uerfluw
other en co
hose in a
water.
3/i inch rubber tubing
pipe and submer the
ar par,iaily fiLed with
4
.
jack up car and r ull *ua mc with Lrane,,uo
-
Sian in drive range or high gear. Lvidence of leak
-
age
from lower radiator hose water Putill, Or c y I
-
indor head gaskets will be bubbling cif air through
rubber l:asc ir.to Jar.
Cylii:oer heao gasket leakage is most evicelIr
at
penca nu L over U.' MPH operai ing ui:..io r fuli
load or wide open tJ:ro-.rl
*
a condition .eeeured
by Iliotnentarily applying the brakes.
Water pump leakage is most evident at higher
speeds :arou,id
M,P.fti ao.d wirE, liiue or rio
mad.
14 Correction of Air and
Water Leakage
Cyltndcr head gasket leakage can be eurrecLed
by innia Ii ing new gaskets after cleaning cylinder
head and bluck surfaces
end LighLening heads
properly,
a.s
explained in Seenoll
II.!, Note 7.
CALYrlON:
Be sure on foreign material fails
out of cylinder head onto gaaet'.ahon placing
the cylinder head on the gasket.
Water punip iuakeu in
all
otherwise normal
cooling everom can l,&.uily he remedied by re
-
placing w,lrn pun:p parta
Ae,,Tcr pain.
gc.,lcl
cunditiun will, huwever, leak air a: high speeds,
if radietar
S Sn
badly clogged that there
ia
a
liigl rostr
ic Liun
aL Lhe pump inlet
or
if the I! Iwe
radiaior hose leaks.
15 Radiator Cleaning Procedure
NOTEr:1i a procedure is rcconi,iiecided for
a'] ears
nnce a year, and to
give niaxinluni
eff c
ian:
y to
average coo iug .sys teals in need
of cleaning.
Drain soi ution from cooling a ye re by opening
all drains.
2 Refi :1 system with fresh water and add one
package of Cadillac Cooling Sy.stcnl Cleaner.
F1. 13-4 CIeanin0 Cylinder flock