Old Buick Carburetors : BUICK MODELS 50 60 70 90 1941 1942Previous | Home | Next |
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Form 6484B—Canadian BUICK 528S-529S-533S-534S-543S-544S
August, 1941
Reprinted August 1945
MOTOR NUMBERS
1941—"M-50"—54075704 and up 1941—"M-60"—64085001
and up 1941—"M-70"—74085003 and up 1942—4457941
and higher
CAR NUMBERS
1941—"M-50"—13880525 and up 1941—' 60"—13880493
and up 1941— M 10"—13880494 and up 1942—14257442 and
higher
BUICK
MODELS
"50""60"
"70" - "90"
1941 1942
(Compound Carburation Optional
on Model "M-40")
5295 Sup. by 543S) 534S Sup. by 5445)
529S-534S-543S-544S (Rear) 528S-533S (Front)
Casting Number on Face of Flange: 528S-533S—324; 529S-534S—346;
5435-5445—409
COMPOUND WCD DUAL DOWNDRAFT CARBURETERS
Model "M-50"--Front, Climatic Control Carbureter, No. 528S—List
$44.10. Rear, Nos. 529S-543S—List $23.50
Models "M-60-70-90"-Front, Climatic Control Carbureter, No. 5335—List
$44.10. Rear, Nos. 534S-544S—List $23.50
(Carbureters 5285-529S-543S, Optional Equipment on Model "40")
Exchange Allowance on Nos. 528S and 533S, $10.00; on Nos. 5295, 534S, 543S
and 544S, $5.00,
deducted from list price when old carbureter is returned.
CARBURETER SPECIFICATIONS
WCD 5285-529S-543S—For "Buick M-50" (Optional "M-40")
8 Cylinder Engine: 3-3/32" Bore, 41/8" Stroke
8
WCD 533S-534S-544S—For Buick "M-60-70-90" Dimensions: (All
Models) Flange size, I inch dual, 3 bolt type. (All Models) Primary venturi,
11/32 inch I. D.
(5335-5345-544S) Secondary venturi, 21/32 inch I. D. (528S-529S-543S) Main
venturi, 7/8 inch I. D.
(5335-5345-544S) Main venturi, 1-1/16 inch I. D.
Float Level: (All Models) Distance from seam of float (both sides —at
top center) to lower edge of bowl cover, when needle is seated to be 3/16 inch.
Vents: (To Bowl) (All Models) Main: Balance type, 7/32 inch I. D. Secondary:
.125 inch diameter inside air horn.
Early 1941 Production—No. 35 drill to atmosphere.
Late 1941 and Early 1942 Production—2 holes, No. 47 drill to atmosphere.
Late 1942 Production—(Front carbureter): external vent, side opposite
choke, No. 47 drill; choke side, No. 55 drill. (Rear carbureter) : throttle
lever side, No. 47 drill; side opposite throttle lever, No. 55 drill.
Gasoline Intake: (All Models) Square vertical push-pull needle. (5285-5335)
Size No. 42 drill hole in needle seat. (5295-534S-5435-5445) Size No. 48 drill
hole in needle seat.
Gas Line Connection: (All Models) 5/16 inch Weatherhead elbow.
Low Speed Jet Tube: (All Models) Jet size, No. 65 drill. (All Models) By-pass,
size 1.30 mm (.0512") drill. (All Models) Economizer, size .035 inch diameter.
(All Models) Idle bleed, size 1.30 mm (.0512") drill.
Idle Ports: (All Models) Upper port, slot type, length, .100 inch; width, .030
inch.
Idle Port Opening: (All Models) .067 to .073 inch above upper edge of valve
with valve closed tight.
Lower Port: (For Idle Adjustment Screw) (All Models) Size .0615 to .0655 inch
diameter.
Cylinder Engine: 3-7/16" Bore, 4-5/16" Stroke
Set Idle Adjustment Screw: (All Models) 1/4 to 11/4 turns open. For richer
mixture turn screw out. Do not attempt to idle engine below 8 to 10 m.p.h.
(See instructions on page 4.)
Main Nozzle: (All Models) In primary venturi, closed tip angle 40' from horizontal.
Nozzle installed permanently. Do not remove.
Metering Rod: (Vacumeter Type) (528S) Economy step .071 inch diameter. Middle
step .070 inch diameter. Power step .060 inch diameter. Length 3-9/64 inches.
This rod is designed with idle stabilizing flat on economy step.
(533S) Economy step .0675 inch diameter. Middle step tapers to .063 inch diameter.
Power step .054 inch diameter. Length 3-9/64 inches.
Metering Rod Jet: (528S) .08575 inch diameter (was .086). (5335) .086 inch
diameter.
Metering Jet: (529S-543S) .0492 inch (1.25 mm) diameter. (534S-544S) .0531
inch (1.35 mm) diameter.
Metering Rod Setting: (528S-533S) Use gauge, Part No. T109-152 (2.440 inches).
Accelerating Pump: (5285-5335) High pressure type (spring operated lever).
Discharge jet (twin) size, No. 74 drill.
Intake ball check size, No. 40 drill.
Discharge (needle seat) size, No. 50 drill.
Pump Adjustment: (5285) 1/4 inch plunger travel (full throttle position). (Connector
link in long stroke hole.)
(533S) 14/64 inch plunger travel (full throttle position). (Con-
nector link in short stroke hole.) Use gauge No. T109-I17S.
Choke: Carter Climatic Control—set at index. Offset butterfly type. Choke
heat suction hole, in bowl cover, (5285) Size, No. 40 (.098") drill; (533S)
Size No. 36 (.1065") drill.
Vacuum Spark Port: (5285-5335) .065 to .067 inch diameter. Bottom of port .035
to .039 inch above valve.
MOTOR TUNE-UP—BE ACCURATE! ALWAYS USE FEELER GAUGES!
CAUTION: Change worn or leaky flange gaskets. Tighten manifold bolts and test
compression before adjusting carbureter.
Idle Adjustment
Screw Setting
r/4 to 11/4
Turns Open
Spark Plug Gap
1941—.025"-.030" 1942—.025"
Set
Breaker Points
.015"
Use Timing Light Breaker Points to Open 6° B. T. D. C.
Set Valves Hot Int. & Exh..015" (See Note, Page 2)
Correct Float Level
3/16-Inch