Checking Valve Lifter Leak Down Rate; Removal Of Valve Lifters - Cadillac 54-6219 1954 Shop Manual

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I 3
ENGINE MECHANICAL
7.
Worn valve stems or push mds.
8.
Worn Camshaft :ohea.
9
Checking Valve Lifter
Leak Down Rate
The Valve Lifter Leak F>awn Rate Tester
Tool
No
J
-
30?! is used to obtain a cumprisOI] of the
leak down rates of hydraulic a Lv e I ifte r
C WIt
[totit
removing them from the engine. This tcl eotpkvs
a simple principle whereby a feeler gauge or a
given thickness is pLaced between the rocker arr:
and he va2e stem, thue causing me valve spring
preasttro to lurce oil out of the lifter. To bring
more uniformity
0
Ma test of leak doWil. a spriag,
anached to the tool and compressed against
toe
valve sprIng retainer, ejects the feeler gauge when
the lifter has leaked down enough to allow the va
ye
to seat, thereby removing votve epring preesure
from the feoLe r .ga uge By noting the Ic n
St I'
of tin
rotit' ired by Ca r.h Lifter to Ic tk dew
i t
lie thickness
of the feeler gauge the faulty lifter or lifters
can ho easily located.
The following procedure s to
Ftc ueed when check
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leg v;ith t:a mcI:
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Remove heater hoses from Cl
f25
or. rncker arm
covers
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2. If car is equipped with Hydro-Vac power
brakes. disconnect vacuum hose at Intake ::moifold
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3. If car is equipped with Air Conditioning, re
move rtar bracket and lonsen generator
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4.
Remove Mack resistor wire front porcelaio
resistor at coil.
5. Remove distrihutor cap coil, and rocker cmi
covers as an assembly
&
Set timing mark
-
C'
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Jo Imrnioitic balancer to
pointer and observe position of distributor rotor.
Check each
lifter as Outlined in he following
table:
3 Intake
4
lr.raket
Rotor ot Ne. 6 firing position l?ointing iuward
front of engine Check:
S Exliau.st
7
lixllaust
.
Insert feeler gauge of tool heogeenvalveste,n
and rocker arm and at the same time compress
101 *'pop.uuL" spring tgsiJtetvelvea?tinwr:aiaer
FIg. 10-12.
'I he too, should he installed a quickl
as posswlc to
elittLtIt:c: any
unnecessary lifter
:ook clown.
II. Note Lhe interval of time Or ring which the l
is held in place by valve spring pressure.
It vili be botInd through this test that the note
lifter or lifters wih hove the shortest :eak down
time.
10
Removal of Valve Lifters
I. Remove heater hnses Irontulipa ott rocker arm
Rc, tor a
L No. 1
firIng
005
it ion pointing
:,00
a
rear of engine Check:
S
Intake
6 Intake
6 Exhaust
7
Ititake
B Intake
S Exhaust
covers.
2. Remove rock Cr arm
-:
ne crc as duscribed in
Nate 3, Steps 1-9, f, 7
3. Remove intake manifold as described in Note
3. Steps 6-11.
4.
Remove three valve cnmpertmeiit cover
Screws
Fir. 10-12 Checking VoLve Lifter Leok
Dovn
I Intake
1 Exhaust
2
Intake
2 Exhaust
3 Hxhaost
4
Exhaust