Four cylinder, L-head Individual cast iron cyl., copper water jacket
Bore & Stroke
4 x 4.5 in. (101.6mm x 114.3mm)
Displacement
226.2 cu. in. (3.707 liters)
Brake H.P.
20 hp
Engine description
Cylinders cast singly, copper water jackets, detachable combustion valve chamber; main bearings replaceable without removing crankshaft; interchangeable inlet and exhaust valves operated by push rod & roller cam follower on single gear driven camshaft; belt driven fan, water pump, and oiler; splash lubrication; three point engine suspension; clockwise cranking.
Carburetor
Float fed carburetor controlled by foot throttle or automatic ring-type governor; jet type carburetor made by Cadillac
Transmission type
selective sliding gear transmission, independently attached to frame
MODEL G CHASSIS
Frame
Pressed steel frame; two half-elliptic front, two full elliptic rear springs; worm and sector steering mechanism.
Clutch
Leather faced cone clutch
Drive
single universal in drive shaft to bevel drive line rear axle
Differential
spur gear differential
Brakes
foot brake internal, hand brake external on rear drums
Tires
32 x 3.5
Wheelbase
100″
Front/Rear Tread
56″
MODEL G STYLE
Bodies
Two door, five passenger Touring and three passenger (single rumble) Runabout, both with wooden dash
Price
$2000
MODEL G OPTIONS
Cadillac-built tops available at extra cost
HISTORICAL NOTES
Although the Model L Cadillac Limousine had a planetary transmission and 5″ x 5″ bore and stroke like the single cylinder Cadillac Runabout, the two models were entirely opposite in concept.
The single cylinder was a horseless carriage for the masses, the Model L a Nabob’s throne-on-wheels.
Whether due to the Alanson Brush patent squabble, acute marketing perception, or both; Cadillac came up with a four cylinder design which met the expectations of customers who wanted just a bit more than the best one cylinder car could offer — an inexpensive, easily maintained, long lasting, precision built car — a “single cylinder Cadillac with four cylinders” — the Model G.
Serial numbers on plate on rear of body or on dash (with engine number).
Engine numbers were stamped on top surface of crankcase — in front of and to the left of number one (front) cylinder.
Model G engine numbers: 30003-30425 (1907), 30426-30500 (1907-1908).
1907 CADILLAC MODEL H
MODEL H ENGINE
Engine
Vertical, inline, L-head four cylinder, individual cast iron cylinders with copper water jacket
Bore & Stroke
4.375 x 5 in (111 mm x 127 mm)
Displacement
300.7 cu. in (4.927 liters)
Brake H.P.
30 hp
Engine description
Five main bearings, mechanical lifters
Carburetor
Throttled, float feed, jet type made by Cadillac
Transmission type
Planetary transmission
Speeds
Three forward and one reverse
MODEL H CHASSIS
Controls
Right hand drive with controls to the right
Clutch
Twin disc in flywheel, disc and 3 bands on transmission
Drive
shaft
Differential
Live axle, bevel drive, bevel differential
Brakes
Mechanical on two wheels — service and emergency on rear drums
Wheels
24″— 12 spoke wood artillery wheels
Tires
32 x 4
Wheelbase
102″
Front/Rear Tread
56.5″
Weight of 2-door Touring
2400 lb (1091 kg)
Weight of 2-door Coupe
2500 lb (1136 kg)
Price of 2-door Touring—5-passenger
$2500
Price of 2-door Limousine—6-passenger
$3600
Price of Runabout—2-passenger
$2400
Price of 2-door Coupe—2-passenger
$3000
Calendar year sales and production
509 (1906-1908)
Model year sales
509 (1906-1908)
MODEL H OPTIONS
Bulb horn
Lights
Touring top ($125.00)
Runabout top ($50.00)
HISTORICAL NOTES
The serial number was located on the plate on the rear of body or on dash (with the engine number).
Engine numbers were stamped on top surface of crankcase — in front of and to the left of number one (front) cylinder.
Engine No.: 10201-10709 (1906-1908).
Introduced January, 1906
Same notes as 1906 Model H except body lines of Touring was simplified and five passenger Limousine offered
1907 CADILLAC MODEL K
MODEL K ENGINE
Engine
Single cylinder, horizontal, with cylinder to rear, cast iron cylinder with copper water jacket, two main bearings, mechanical valve lifters
Bore & Stroke
5″ x 5″ (127mm x 127mm)
Displacement
98.2 cu. in. (1.609 liters)
Brake H.P.
10 hp
Carburetor
Updraft mixer, manufactured by Cadillac
MODEL K CHASSIS
Features
Same as 1906 except muffler much shorter with outlet at front rather than side
oiler drive changed from cam to pulley and belt
Engine/transmission drip pan added
Runabout bodies remained the same as 1906 but front fenders were changed
— nose of fender was now flattened and an inside skirt was added (early 1907 catalogs still showed the canted fender).
For the first time, a factory-installed-only Victoria style top was offered, as well as a buggy top.
Tires
30 x 3
Wheelbase
74 in.
Overall length
9′ 2″
Height
5′ 6″
Front/Rear Tread
56″ (61″ opt)
Weight
1100 lb (550 kg)
Price of Victoria Runabout
$800
Notes
Prices on Cadillacs varied somewhat in different catalogs and ads,
possibly due to severe economic crisis in 1907.
Serial numbers on plate on rear of body (with engine number).
Engine numbers were stamped in three places:
Top right edge of cylinder flange, near the water outlet
Top surface of left, front mounting leg
On a plate at the rear of body with the serial number
MODEL K OPTIONS
Bulb horn; lights. Rubber top with sides & storm apron
$30.00
Leather top with sides & storm apron
$50.00
1907 CADILLAC MODEL M
MODEL M ENGINE
Engine
Single cylinder, horizontal, with cylinder to rear
cast iron cylinder with copper water jacket
two main bearings
mechanical valve lifters
Bore & Stroke
5″ x 5″ (127mm x 127mm)
Displacement
98.2 cu. in. (1.609 liters)
Brake H.P.
10 hp
Engine description
Two main bearings, mechanical valve lifters
Carburetor
Updraft mixer manufactured by Cadillac
Transmission
Planetary
Gears
3 forward, 1 reverse
Gear ratios
Low: 3:1; High: 1:1; Reverse: 3:1
Drive
Chain
Differential
Spur gear
Overall ratio
3.1:1 to 5:1 depending on drivetrain option
MODEL M CHASSIS
Tires (touring)
30 x 3.5
Tires (other bodies)
32 x 3.5
Wheelbase
76″
Overall length
9′ 7″
Height
5′ 2″
Front/Rear Tread
56″ (61″ opt)
Brakes
Mechanical on two wheels contracting on inboard drums
Wheels
23″ wood with 12 spokes
MODEL M DRIVETRAIN OPTIONS
Different combinations of 9 or 10-tooth driving sprocket with 31, 34, 38, 41, or 45-tooth driven sprocket gave ten possible ratios from 3.1:1 to 5:1.
Lower ratios for runabout to be run on smooth, level roads to higher ratios for loaded delivery cars to be run on rough, hilly roads.
Instructions for changing sprockets were furnished to owners, but the change involved disassembly of the transmission and rear axle — definitely not a “quick-change” set-up
MODEL M NOTES
Chassis same as Model K except for two inch longer wheelbase.
Additional body styles offered.
Straight line Touring again available.
Folding Tonneau new.
Tonneau folds to look like runabout but this body not available on shorter Model K chassis.
First production one cylinder Coupe offered.
Serial numbers on plate on rear of body (with engine number).
Engine numbers were stamped in three places on the crankcase
On the top of the crankcase at the right edge of cylinder flange, near water outlet
On the top surface of the crankcase at the left, front mounting leg
On a plate on the rear of body
Blank spaces on the patent plate were for additional patent dates, not engine or serial number
Serial number: 21851 to 22150 and 24075 to 24350
MODEL M OPTIONS
Bulb horn
Lights
Rubber cloth Cape Cart top for Touring ($100.00)
MODEL M HISTORICAL NOTES
Introduced 1906.
Calendar year sales and production: 2350 with models M, K, S (1908), T (1908).