Car Repair Manuals

Cadillac Service Repair Manuals


Model 341 distinctives:



Drive Line



1926 Cadillac

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1926 Cadillac

Serial numbers were not used.

Engine numbers were stamped on the crankcase immediately above the base of the oil filler spout and on plate on dash.

Starting: (1925) 100001. (1926) 114250. Ending: (1925) 114249. (1926) 142020.

Up to the Series 314, Cadillac had used the engine number as the key identifying number for the vehicle, and all changes made during a model production run were recorded by engine number. Parts orders listing the part and the engine number insured receipt of the correct version of the part, including correct paint color, if applicable.

1926 Cadillac

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1926 Cadillac Roadster

Starting with the Series 314, a "Unit and Car Number" scheme was put into effect. Each car was assigned an engine number, which was stamped on the engine and on a plate on the firewall just before the car was shipped. This engine number, as before, was the identifying number of the vehicle - to be used for registration, etc.. However, changes were recorded, for the most part, by Unit Number, which was the number stamped on each main assembly of the vehicle as that assembly was completed. Engine number and engine unit number bore no relation to each other. A change made at engine unit number 1-38009 might or might not have been included on the car carrying engine number 138009.

Various Cadillac manuals and parts books detail the various changes by unit number or, in rare cases, by engine/car number; but no cross reference exists. If the factory kept any cross reference of unit numbers against engine/car numbers, they did not pass it along with the car. Dealers were urged to make a unit number record for each of their customer's cars, so as to be able to service and supply parts for the car according to the exact requirements of the particular configuration of that vehicle.

Engine numbers for Series 314 cars consist of six digits, starting with the figure 1. Unit numbers for Series 314 cars consist of the figure 1, followed by a dash, followed by one to five digits. The generator and starter carried Delco serial numbers. The various numbers are located as follows:


Standard Body Styles
Style No.DoorsBody TypeSeatingPriceWeight
64002-dr.Brougham5$29951852 kg
64302-dr.Coupe2$30451836 kg
64902-dr.Victoria4$30951870 kg
64204-dr.Sedan5$31951887 kg
64104-dr.Sedan7$32951927 kg
64404-dr.Imperial7$34351982 kg
"Custom" Body Styles (August, 1925)
Style No.DoorsBody TypeSeatingPriceWeight
11544-dr.Touring7$32501955 kg
11554-dr.Phaeton4$32501800 lg
11562-dr.Roadster2/4$32501782 kg
64602-dr.Coupe5$40001905 kg
64704-dr.Sedan5$41501905 kg
64504-dr.Suburban7$42851932 kg
64804-dr.Imp. Suburban7$44851980 kg
"Custom" closed body styles (Jan '26),
replacing closed bodies of Aug '25 (sloping windshield)
Style No.DoorsBody TypeSeatingPriceWeight
66802-dr.Coupe5$40002030 kg
66904-dr.Sedan5$41502030 kg
66704-dr.Suburban7$42852290 kg
67004-dr.Imp. Suburban7$44852098 kg
Mid-year Additions to "Custom"
Style No.DoorsBody TypeSeatingPriceWeight
6680-L2-dr.Cab. Coupe5--
6690-L4-dr.Cab. Sedan5--
6670-L4-dr.Cab. Sub.7--
6700-L4-dr.Imp. Cab. Sub.7--
Semi-commercial line
Style No.DoorsBody TypeSeatingPriceWeight
NA5-drCus. Limo. Funeral-Coach---
NA5-drImp. Limo. Ambulance---
NA5-drImp. Limo. Funeral Coach---
NA3-drArmored Car--2955 kg

Note: The weight of the 3-dr. Armored car is approximate.


Engine Type Ninety degree V-8. L-head. Cast iron blocks of four on Aluminum crankcase.
Bore and Stroke 79.4mm x 130.2mm
Displacement 5.153 Liters
Brake H.P.80 plus advertised
S.A.E./Taxable/N.A.C.C. H.P.31.25
Main bearingsThree
Valve liftersMechanical lifters with roller acting directly on cams
Carburetorfloat feed, auxiliary air control; manufactured by Cadillac under C. F. Johnson patents


 All Standard Cars Plus Custom RoadsterAll Custom Cars except RoadsterSemi-commercial
Front/Rear Tread1422mm1422mm1422mm
Tires33 x 6.75 low pressure.33 x 6.75 low pressure33 x 6.75 low pressure.


TransmissionSelective sliding gear transmission. Case in unit with engine
Speeds3 Forward and 1 Reverse
ControlsLeft drive, center control (rhd opt)
ClutchMultiple disc clutch
DriveShaft drive
AxleSpiral bevel, full-floating rear axle
Overall ratio4.91:1, 4.5:1, 4.15:1
BrakesMechanical brakes on four wheels
WheelsWood artillery wheels, split rim, 12 spoke (Wire and Disc opt.)
Wheel size21 in.
Optional Drive ratio5.33:1 (Standard on armored car)


Front bumper for Standard Cars$24.00
Rear bumper for Standard Cars $24.00
Heater $32.60
Spring covers for Standard Cars $20.00
33 x 5 Tires on wooden wheels NC
Tonneau windshields $90.00-120.00
Trunks $56.00-72.50
Note: Cadillac still took the stand that their cars were complete and ready for entirely acceptable service as-built. However, accessories were recognized and dealers were encouraged to handle this business. Accessory catalogs were published by factory branches and the factory put out bulletins to dealers. It would be a few more years before the factory put out an accessory catalog directly to the public.


1926 Cadillac Notes

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