A crankshaft converts the linear energy of the pistons into rotational energy in an engine. The rotational motion then transfers through the gearbox to the wheels.Continue Reading
A crankshaft is also referred to as a crank and has four main parts, which are the main journals, the connecting rod journals, the piston assembly and a flywheel in some engines. Other parts include webs, pins, throws and rear main bearing journal.
The main journals are the most significant parts as they act as support points and the center of rotation for the crank. In most crankshaft assemblies, the main journals as well as the connecting rod journals have a hollow construction that helps boost the crank’s torque capability in addition to reducing the total weight of the assembly.
In manual transmission engines, the flywheel is the point at which the engine and the drive train connect. In automatic transmission engines, the connecting point is called a torque converter.
The crankshaft is set in motion when compressed air and fuel ignites, resulting in a powerful force that is exerted on top of the pistons. When the pistons move down into the cylinder, the connecting rods push against the crankshaft.
The crankshaft is designed to move in a rotary motion when the connecting rods apply force to it as opposed to the up and down motion of the pistons and connecting rods.Learn more about Car Parts & Maintenance
As of 2015, Chevrolet's ZZ572/720R Deluxe Dyno big-block engine is a cast-iron V8 with four-bolt main caps, a forged-steel crankshaft, forged-steel shot peened connecting rods and forged aluminum pistons. The engine has a 572-cubic-inch displacement with a 4.560-inch by 4.375-inch bore/stroke ratio. The cylinder heads are aluminum rectangular port with 118-cubic-centimeter chambers, the stainless steel intake valves are 2.250 inches and the exhaust valves are 1.880 inches. The engine has a mechanical roller camshaft and a 12-to-1 compression ratio.Full Answer >
To replace the car's timing belt, degrease the engine, drain the coolant, remove the old belt, insert a new belt in the place of the old one, replace the crankshaft seal with a new one and refill the coolant. For proper replacement instructions, refer to the owner's manual.Full Answer >
Typically, the camshaft sensor is located at the top of the engine to the front and mounted near the crankshaft in front of a wheel. The wheel has windows or slots that allow the sensor to count each revolution of the camshaft. The sensor is readily accessible if it needs to be changed. However, some imported cars, including Hondas, have the crankshaft and camshaft sensors inside of the distributor, requiring replacement of the entire distributor for this type of vehicle.Full Answer >
A car's starter motor is an electric motor that engages and turns the main crankshaft, drawing air and fuel into the cylinders so the engine can start. To do this, the starter draws heavy current through the battery, engages a flywheel or flexplate connected to the crankshaft, and turns it.Full Answer >