crankshaft pulley

Crank pulley

crankshaft transforms the reciprocating motion of the pistons into a circular motion that can take advantage of the transmission to be able to move the vehicle.

An element located at one end of the crankshaft is the flywheel. At the other end we find the crankshaft pulley. This component, also called damper, its main function is transmit the movement to the auxiliary organs of the engine such as: the Alternator, Water Pump or the bomb power steering.

More functions of crankshaft pulley

All these auxiliary elements are attached to the crankshaft pulley by means of the auxiliary strap. Apart from this function, in some vehicles, the crankshaft pulley also helps reduce vibrations produced by the engine and to correct the oscillations that occur in the rotation of the crankshaft.

Crankshaft pulley of an engine with its belt

In other words, a engine is a machine that has to be as balanced as possible so that it fulfills its function without the vibrations and oscillations getting out of control. Hence a crankshaft is full of counterweights, which become more apparent in engines with odd cylinders. Thats why he weight and vibration absorption capacity of the pulley, which it has at one of its ends, helps everything roll as it should.

crankshaft pulley parts

In the main photo of this article you can see them clearly. crankshaft pulley consists of three elements: the solid central part, which is where the axis of rotation is inserted; a rubber ring around it and, finally, another solid outer part, which has the necessary channels to be able to put the auxiliary strap without it getting out of its way.

The solid parts of the pulley they are usually metal. In the photo below it looks better, because it doesn't have any paint to hide it. This is because a very strong material is required to withstand mechanical stress without deforming over time.

However, the problem with metal is that it transmits vibrations very well, which would increase the noise of the pulley. In addition, it would also reduce the grip of the strap and its durability. Hence it requires a soft part that absorbs these vibrations, in the same way as the silentblocks of a suspension or any other part of the vehicle.

Gold colored crankshaft pulley

Faults of the pulley and its belt

In some cases crankshaft pulley may be damaged, which normally does it through the central part of rubber, so it is important to check it and replace it if necessary. When this happens, a metallic noise or a creak usually sounds, which is nothing more than the two metal parts rubbing together.

In addition, it is also important that the auxiliary belt is in good condition. If the auxiliary belt breaks, none of the components it supplies kinetic energy to will work. What will cause the ignition of the check engine light and will even stop for safety. In addition, some of the pieces can slip through the crankshaft pulley, with the consequent danger of serious engine damage.

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Replace the crankshaft pulley: better in a workshop

Replacing the crankshaft pulley is not a very complicated task in itself. Nevertheless, depending on each vehicle, access to it can be more or less difficult. So we do not recommend that you do it yourself unless you have mechanical knowledge and the necessary tools. In a trusted workshop you can be sure that leave everything as it was.

The time and difficulty of its substitution will be different depending on which pieces have to be played. In some you have to remove the air filter and move the spark plug wires, to access from the engine compartment. In others it will be necessary to remove a wheel, the step and the casing that protects the pulley, to be able to access from the wheel well.


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      jesus gonzalez said

    If the pulley is blocked and the strap has not broken, what could be the problem?

      victor sarmiento said

    I need a crankshaft pulley I request someone to give me some information or can provide it thanks

      ruben said

    I need a d aewoo nubira crank pulley for my car and how much does it cost

      alfedo lopez said

    I need a crankshaft damper from a corolla 97

      Louis E Perez said

    I need a crankshaft belt for my basic mod 2005 Vitara. In Medellin.

      eduardo said

    Hello, I'm Eduardo, I have a half-old space wagon, they changed the damper and the car was advanced, which could be, on the slopes it doesn't pull well. I appreciate suggestions and experiences, thank you very much in advance