What are the two main functions of a crankshaft?
The crankshaft converts reciprocative motion to rotational motion. It contains counter weights to smoothen the engine revolutions.
How main bearings should be checked and fitted to the crankshaft?
The crankshaft should be set evenly into the main bearing. Next, install the lower bearings and caps, checking for proper fit and position. Check for proper oil clearance. Check the end clearance between the crankshaft thrust face and the bearing flange, with the crankshaft all the way forward.
How is a crankshaft removed from an engine?
Take care when removing the final cap, as the crankshaft is very heavy. To avoid injury, hold the crankshaft against the engine when the final cap is removed, then slowly lower the crankshaft out of the engine to complete the removal process.
How are the journals of the crankshaft connected?
The rod journals are connected to the main journals by webs. The distance between the center of the main journal and the center of the crankshaft pin is called the crank radius, also called the crank throw. This measurement determines the range of piston travel as the crankshaft rotates – this distance from top to bottom is known as the stroke.
When do you change the bearing on a crankshaft?
The bearing is softer than the journal, and can be replaced as it wears and is designed to absorb small amounts of contaminants, if there are any, to save damaging the crankshaft. A main bearing cap is then bolted over the journal and tightened to an exact torque specification.
What are the different types of crankshafts?
1. Side crankshaft or overhung crankshaft, as shown in Fig. (a), and 2. Center crankshaft, as shown in Fig. (b). The crankshaft, depending upon the number of cranks in the shaft, may also be classified as a single throw or multi-throw crankshafts.
How is the deflection of the crankshaft affected?
Crankshaft deflection is affected by several factors in addition to cylinder pressure. These include the structure of the block and crank along with the strength of the bearings, the bearing clearance and the condition of the oil film.
How do you remove a left hand crank?
How to remove your crankset. 1. Loosen the left-hand crank bolts. First, use a 4mm Allen key to loosen up the hex bolts that hold the left-hand crank arm onto the crank spindle. Make sure that you loosen them fully, but don’t remove them completely.
Why is the position of the crankshaft so important?
The speed and position of the crankshaft are two key parameters that the car’s computer uses for engine management calculations. So, you may understand how important it is for the sensor to work without any glitch. Let’s learn about some crankshaft position sensor failure symptoms so that you can take action when there’s a problem.
What does it mean when your crankshaft sensor goes off?
It’s another issue that indicates a malfunction of the sensor, and one of the crankshaft position sensor symptoms. In this case, your car will still run but the engine will turn off after some time. The misfiring will also occur the same way. If you keep ignoring the signs, the engine will shut off permanently.