Tightening the alternator belt have the right to solve most difficulties under the hood such together squealing noises when beginning the engine or control the car. To get to understand more, check out on...

You are watching: How to tighten an alternator belt


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An alternator is an important part in the automobile engine assembly that does the project of creating electricity to operation all electrical components of the vehicle. The generation of electrical energy is feasible mainly since of the working of the alternator belt that runs native the engine crankcase come the alternator. For the alternator to occupational efficiently, the belt is supposed to be preserved in proper condition. A an extremely tight belt would certainly put push on and also damage the parts in the assembly, conversely, a loosened belt would not allow the components to run firmly. If you occur to hear a squealing noise from under the hood, it can be a case of a loosened alternator belt, which demands to be tightened.

Tips top top Tightening an Alternator Belt

For a DIY task, girlfriend will simply require a socket wrench set. Find the alternator located under the hood and also find just how the setup is done. Girlfriend would uncover a bolt that secures the alternator ~ above the framework of the assembly. Check, if it is secured enough and does not have slack. Also make a point to check other bolts that organize the alternator in place.

Now you will have actually to find where the belt tensioner setup is. If the is a slider tensioning system, friend will need to loosen the slider bolt making use of the right form of wrench. The assembly would usually have a tensioner lock nut and a tensioner bolt. Loosen the nut and also bolt, after which you will have actually to set the alternator versus the belt. Currently you have to tighten the slider bolt and the tensioner lock bolt. You even need to check the stress in the belt while tightening it. Tighten the bolt till there is about 1/2 customs of slack on the belt. This measurement can be done making use of a little ruler placed over the belt. One more option is to usage a drive belt stress gauge to get accurate readings about the play on the belt.

You can spray one aerosol belt dressing product ~ above the belt to add to that is smooth running. During the measure of the belt slack, that the belt does not go under ½ inch, girlfriend will have to release tension off the tensioner bolt. A tighter belt can even be a an outcome of the belt being smaller sized than what is required around the alternator. Below is part information about getting a brand-new belt installed.

Replacing Alternator Belt

If even after the tightening, girlfriend hear a squeaky noise native the hood, then most likely it’s time to replace the belt. Friend can check for a negative belt by sliding her hand throughout the belt and checking for cracks and irregularities. Together a basic test, check if the belt moves out of location after transporting out the fix by do the efforts to rotate the alternator pulley with your hands. If the does, friend will have actually to get it replaced.

Manufacturers recommend the belt to be replaced every 40,000 come 50,000 miles. However, keep in mind that you need to obtain it changed as shortly as girlfriend encounter any kind of problems stated above. Sometimes, constant loosening of a belt is additionally the fault of the tensioner, i m sorry is as soon as you require to get the tensioner replaced.

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Tightening the belt have the right to lead to a ideal grip, hence increasing the alternator’s functioning. If the is a serpentine belt, suitable tension will also help other components to occupational smoothly. Keep in mind that this is simply a standard procedure for tightening the alternator belt. The procedure may vary together per auto type, so the is vital to refer to the organization manual for precise steps. Come prevent any kind of issues in ~ the alternator assembly, that is said to acquire the system checked during routine servicing.