How long does it take to replace an alternator belt?

Replacing an alternator can take up to about two hours or so at a mechanic but could take longer if you opt to get the job done yourself and you’re new to this kind of a repair.

How tight should alternator V belt?

The belt should have no more than a 1/2 inch of slack to be properly tensioned. Adjust the belt as needed from the adjustment bolt until the slack in the belt is no more than a 1/2 inch. Tighten the mounting bolt to the engine accessory with the ratchet and socket.

How much tension should a alternator belt have?

You want to be able to press down on the belt at a mid point between two pulleys and only be able to move it downward about 1/8 to 1/4 inch. When you have the alternator in the right position, have an assistant tighten the top bolt and nut to lock the alternator in.

When I start my car it makes a screeching noise?

If you ever hear a loud engine squeal or screeching noise when starting your car, it could be a sign of a bad serpentine belt or an alternator that is failing. A bad alternator is the most common cause of a car that squeals when starting.

Why does my new alternator belt squeal?

A new belt is recommended once the accessory drive has been realigned. “Squeal” is a high pitched noise, typically lasting several seconds in duration. This type of noise will typically increase in volume as the engine speed increases, and is caused by relative slip between the belt and pulleys.

Why is my belt squealing when I accelerate?

The serpentine belt can be a common cause. If the belt is worn (dry, cracked,glazed) it can slip on acceleration and make a squealing sound. Also, if any of the pulleys on the alternator, p/s pump,etc, are worn or loose, they can cause the belt to squeal.

Will WD 40 fix a squeaky belt?

Spray just enough WD-40 onto the belt to lightly cover the area where the squeal occurs. Oversaturating the belt will result in severe slipping, which can permanently damage the belt. WD-40 is a water displacement lubricant and should remove the moisture from the belt ribs.