Founded in 1995, China Dongda Power Industry Co., Ltd. is one of the few 6 cylinder manufacturer and distributor in China that has patents on the generator, motor, power supply, engine, alternator, diesel and gearmotor design, supply and sale. Our custom 6 cylinders has obtained the certifications of ISO9001-2000, GS/TUV, CE, VL, EPA, QHS, SON, CAP and SRS and we have won EPA 2005 Motor Year Certification. Our 30 QC staff carefully performs inspections at every stage of production, from the time we receive raw materials to packaging. Noise, power, and stability are tested to ensure that our engines can endure 580 hours of constant use. We also can design and deliver OEM/ODM samples in one month.

Inline six cylinder, overhead valve, cast iron block, displacement - 116.5 cubic inch, bore and stroke 3-1/2 X 3 3/4 inches, compression ratio 6.5:1, 90 horsepower, four main bearings and solid valve lifters. Carburetor was the reliable Rochester one-barrel model 7002050 B or BC type (C indicating automatic choke). 4.11:1 gear ratio, torque tube drive with tubular propeller shaft, fully enclosed. 1950 Chevrolet cars were equipped with 3 speed standard 1950 Chevy transmission. Inline 6 Cylinder Engines could soon be a thing of a past if Ford's decision to cut them by 2010 is any indication. Citing economical and environmental issues, Ford has decided to invest heavily into the new Duratec V6 engines. According to Ford, the main concern behind the decision is the added pressure to produce a more environmentally friendly engine and due to the added increases of petrol prices. As a result of this, Ford Australia has cut 600 jobs at their Geelong engine plant.

This arrangement denotes an engine with one cam per head. So if the engine is an inline 4-cylinder or inline 6-cylinder, it will have one cam. If it's a V-6 or V-8, it will have two cams (one for each head).
The cam actuates rocker arms that press down on the valves causing them to open. Springs then return the valves to their closed position again. These springs have to be very strong because at high engine speeds, the valves are pushed down very quickly, and it is the springs that keep the valves in contact with the rocker arms. If the springs were not strong enough, the valves might come away from the rocker arms and snap back. This is an undesirable situation that would result in extra wear on the cams and rocker arms.
On single and double overhead cam engines, the cams are driven by the crankshaft, via either a belt or chain called the timing belt or timing chain. These belts and chains need to be replaced or adjusted at regular intervals. If a timing belt breaks, the cam will stop spinning and the piston could hit the open valves.

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