How to Install a Crankshaft Pulley How to Install a Crankshaft Pulley

What You'll Need
Spanner and wrench
Jack stand
Safety gear
Cleaning rags

A crankshaft pulley is located at the base of the engine. It is a small but important component that facilitates proper engine function; the crankshaft pulley has a direct impact on various aspects, including the effective running of the coolant pump, spark plugs, engine battery charging, the air-conditioning pump, power steering pump, etc.

In most vehicles, the crankshaft pulley comes attached with a harmonic balancer, also known as a dampener. The harmonic balancer is an important attachment, as it reduces the multiple vibrations from the crankshaft. By effectively absorbing these, the harmonic balancer makes sure that the crankshaft is not dislodged because of the vibrations, usually resulting from running engines. The harmonic balancer is typically attached to the crankshaft pulley with adhesive. Over time this adhesive can lose strength. It can come loose, fall off or fail. A failed harmonic balancer shifts the vibration shock to the crankshaft. It affects the above mentioned functions, and as a result, it affects the engine functioning. In such a scenario, the car will need a new crankshaft pulley installed.

Step 1 – Disconnect the Battery and Prepare for the Install  

The first step to install a crankshaft pulley is to disconnect the car battery. At this point, you should also pull out the cable that is attached to the battery’s negative terminal. It is important to maintain a gap of at least a minute and a half after disconnecting the cable and proceeding with the next step. If you don’t, you may activate the vehicle’s airbags. This wait is not essential in all cars, especially the older makes; however, most modern cars will require that you wait at least a minute before proceeding.

Step 2 – Remove the Tire

After you see the break through, go ahead and prop the front section of the car up on a floor jack. Once the car is secure, begin loosening the wheel bolts and nuts on the side of the steering wheel with the help of a wrench. When the tire comes off, keep it aside.

Step 3 – Remove the Splash Shield   

Once you remove the wheel, it is time to remove the splash shield. The splash shield usually stands on the wheel well and is held together by rivets. These are easily removed using a regular screwdriver. Keep the separated parts safe, as you will have to reattach them post installation. The new crankshaft pulley is to be placed right behind the removed guard.

Step 4 – Install and Connect  

With the splash shield removed, you now need to install the new crankshaft pulley. First, remove the old crankshaft pulley. You will find that this is secured or threaded by means of the crankshaft. Once the old one is removed, you can re-attach, or re-thread, the new pulley into place in the same manner.  When you are sure that the new pulley is held firmly in place, fasten the splash shield back on, followed by the tire. Next, remove the floor jack and also attach the disconnected cable and battery.

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