Althoughthe Model L Cadillac Limousine had a planetary transmission and 127mm x 127mm 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).
MODEL G ENGINE
Four cylinder, L-head Individual cast iron cyl., copper water jacket
Bore & Stroke
102mm x 114mm
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
Three point engine suspension
Float fed carburetor controlled by foot throttle or automatic ring-type governor; jet type carburetor made by Cadillac
Selective sliding gear transmission, independently attached to frame
MODEL G CHASSIS
Pressed steel frame; two half-elliptic front, two full elliptic rear springs; worm and sector steering mechanism.
Leather faced cone clutch
single universal in drive shaft to bevel drive line rear axle
spur gear differential
foot brake internal, hand brake external on rear drums
32 x 3.5
MODEL G STYLE
Two door, five passenger Touring and three passenger (single rumble) Runabout, both with wooden dash