What are the signs of a bad belt tensioner?
Some of the more common symptoms of a failing or bad belt tensioner include the following.
- Squeaking or Grinding Noise. …
- Unusual Belt Wear. …
- Failure of the Belt-driven Accessories to Operate. …
- Bleeding Rust and Presence of Cracks. …
- Excessive Wear of Pulley Bearing. …
- Visible Signs of Pulley Wear.
What do the numbers mean on a serpentine belt?
Most v-ribbed belts, commonly referred to as serpentine belts, contain two different part numbers. … EXAMPLE: 6PK1003 » 6 – This indicates the number of ribs on the belt; therefore, this is a 6-rib belt. » PK – The “P” indicates a metric designation, and the “K” indicates the belt is automotive per SAE J1459.
How do you diagnose a squealing belt?
One method to determine if the noise is a chirp or squeal is to use a water squirt bottle and spray the rib side of the belt while the vehicle is running. If the noise gets louder, it’s a squeal. If the noise goes away, it’s a chirp.
When should I replace my belt tensioner?
It should be noted that the drive belt itself will most likely need replacing before the tensioner does. Drive belts typically last anywhere between 40,000 and 70,000 miles. There aren’t a lot of warning signs that a drive belt tensioner has hit the end of its lifespan, in fact there is really only one.
What happens when a drive belt goes bad?
That means when your belt breaks, slips and, ultimately, wears out, everything—from the power steering pump to the alternator and air conditioner—stops working. What’s more, the parts it controls can become severely damaged. Broken hoses and belts are bad; a damaged engine is even worse.
Is the belt tensioner supposed to move?
It’s somewhat normal for the tensioner to move. The belt is rubber after all and it stretches and retracts like a rubber belt should.
How tight should car belts be?
The required measure of tension in the serpentine belt is that it should not deflect more than ½ inch when twisted either way from the middle. If twisted more, the belt is loose, and if twisted less, the belt is too tight. Either of the positions does not work for the vehicle.
Is AV belt the same as a serpentine belt?
V belts are traditionally found in older motors, where you would have a series of those belts coming off the crankshaft, each to their own individual accessory group (alternator, a/c compressor, etc). … Serpentine belts are much thicker by comparison and generally unify all accessories under one belt system.
How do you know what size V belt to get?
Use a cloth measuring tape (not a steel one) and wrap it around the outside of the belt. You also use a thin string to take this measurement and place it on a steel tape to get the correct length. Next, for “A” Belts (1/2” width) subtract two-inches from the outside measurement to select the correct V-belt.
How do I know what size my serpentine belt is?
Measure the length of string it took to wrap around the path of the serpentine belt. Purchase a belt one size smaller than the size you measured. The actual belt will have tension on it, whereas the string doesn’t. For example, if you measured 80 inches, purchase a belt that is 79 1/2 inches.
What does a serpentine belt do?
A serpentine belt is a single, continuous belt used to drive multiple peripheral devices in an automotive engine, such as an alternator, power steering pump, water pump, air conditioning compressor, air pump, etc.
How do you loosen a power steering belt?
Lay a straight-edge between the pulleys; both should be parallel with it.
- Pull the belt hard away from a straight-edge to measure deflection.
- Slacken the adjuster bolt slightly, but do not remove it.
- Slacken the pivot bolt or bolts slightly, but do not remove.