OIL PUMP
ENGINE SPECIFICATIONS (ContI d.)
PISTON RINGS
7-1/2
Clt, per min,
.001" to' .002"
.005"
.004"
.004"
.002" to .0035"
3 pe r pi"ston
Tapered
Indicates to p
Ventilated
Expander used
Expander used
,007" to ,Oil"
.0015" to .0035"
.0045"
Chromium Plate:!
Clearance
Number used
Type - l- roduction
Compression (2)
Pit Mark
Oil Control (I)
Standard Size Service
Top Compression
not tapered
Second Compression
tape red
Oil Control
Replace rings when gap inc reases above
,012", plus three times the bore wear,
F:nd Gap
Ring Land Clearance
-----R-eplace at
,006"
----- 7 Ibs,-
lO Ibs,
pailltt'd greell
1-15/16"
loose to ,DOl"
press
,0005" to ,0025"
loose
Treated
paper
,007" thick
Gt>ar Backlash
fv1axinmnl Gear Backlash
Tooth Tip to Body
Gear end clearanCE:
Drive Shaft Clearance
iI1 bushing
DJ-ive Shil-ft Clearance
in bushing maximunl
Driven Gear Shdft _001"
in body
Driven Gear Shaft
in block
Oil Pump to block gasket
Oil Pump cover to body
gasket - lead
Capacity
Pressure
Minimum
lvIaxirn_um
Spring (relief valve)
Length (free)
PISTON
Cdst Iron
Oversize Rings ,020"
&. .040"
Not to be used until block is rebored
.5433"
to- .5435"
,003" and ,005"
Light push fit
Very light push fit
.0003" loose or noisy
14 M.M.
.025"
A.C. 45 or autolite AN?
Size
Point Gap
Intake Tappet Clearance ,01
ZIt cold
Roto Exh. Tappet Clearance .01 Z" cold
Timing Marked gear
Inlet Opens T .D,C.
Inlet Closes
350 after B,D.C,
Exhaust opens 40° before B.D,C,
Exhaust closes T .D.C.
Seat Angle 450
Seat Diameter 57/64"
Maximum Seat Width 1/16"
Intake Stem to Guide Clearance .001-8"
Replace at .005" Maximum
Exhaust Stem to Guide Clearance ,0035"
Replace at .007" Maximum
Pilot Size 5/16"
Guide Length 1-21/32"
Location 25/32" from top of block
to top of guide
factory reamed to size
free length 1-13/16"
1-3/4"
Service Guides
Valve Springs
Replace if less than
VALVES
SPARK PLUGS
2.362" to 2,364"
2.3735"
to 2,3750"
2-9/31."
2,362" to 2,364"
2,3735" to 2.3750"
2-9/32"
Releived
,DOl"
.0035" ,.020", .040"
l/l" above skirt end
450 each side of pin
True Round
,0035", ,020", ,040"
Bosses releived at
F:nd of pin
Tapers Out
Tar_ers Out
Piston
Sizes
Dimensions
Top
Ski rt
Height
Carn Ground
Si
ze s
Dinlensions
Top
Skirt
Height
Aluminum
Diameter
Oversizes furnished
Fit in Piston
Fit in Rod
Replace
PISTON PIN
G-4
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