Symptoms of a Bad or Failing Air Pump Belt

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The air pump is a common emission component found on many road vehicles, and particularly older vehicles with V8 engines. The air pumps serve to reduce emissions, and is usually driven by an engine accessory belt. As is normally the case with most automotive belts, they are made of rubber that will wear out and eventually need to be replaced.

As the air pump belt is what drives the pump, the pump, and therefore the entire air injection system, cannot function without it. Because the air pump is an emission component, any problems with it can quickly translate to problems with engine performance, and can even cause the vehicle to fail an emissions test. Usually, a careful inspection of the belt for any visible symptoms can quickly reveal to the driver if the belt needs to be replaced.

1. Cracks on the belt

Cracks on the belt are one of the first visual symptoms that the air pump belt needs to be replaced. Over time, with constant exposure to the extreme heat from the engine and contact with the pulleys, cracks will develop on and at the ribs of the belt. Cracks are permanent damage to the belt that weaken its structural integrity, making the belt more susceptible to failure.

2. Large chunks of rubber missing from belt

As the AC belt continues to wear, cracks can develop near each other and weaken the belt to point where entire chunks of rubber can break off. Any places along the ribs of the belt where rubber has broken off are considerably weakened, as are the places along the belt where it is more likely to break.

2. Scuffs along the outside of the belt

Another symptom of an excessively worn AC belt are scuffs along the edges or outsides of the belt. Usually this is caused by a misalignment of the belt on the pulley, or by contact with some sort of debris or component of the engine. Some scuffs may cause threads from the belt to come loose. Loose threads along the edges or outside surface of the belt are obvious signs that the belt should be replaced.

The belt is what directly drives the AC compressor, which pressurizes the entire system so that the AC can function. If the belt fails, your AC system will be completely disabled. If your AC belt has failed, or you suspect that it may need to be replaced, have a professional technician, such as one from YourMechanic, inspect the vehicle and replace your air pump belt to restore and maintain proper functionality of the vehicle’s AC system.


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Rigoberto

9 years of experience
706 reviews
Rigoberto
9 years of experience
Chevrolet Equinox - Brake Pads Replacement (Rear) - Niles, Illinois
Rigo was great! He got there early, finished the job early, left everything clean. He changed my rear pads and rotors. The original quoted time was 90 minutes, he was done in about 60. He knows what he is doing and I am recommending him to all my friends and coworkers.
Mercedes-Benz C250 - Brake Pads Replacement (Front, Rear) - Chicago, Illinois
Rigo is a maverick hands down. Don’t take your car for work elsewhere. Especially great at Mercedes—this guy knows his profession! I will be using him for everything related to my car going forward.

Arturo

25 years of experience
35 reviews
Arturo
25 years of experience
Kia Forte - Brake Pads Replacement (Front) - San Diego, California
ARTURO is great! very professional , fast, replaced my front brake pads and oil an filter change. everything now works and works well. Brakes have much improved stopping power and engine is smooth and quiet.Arturo is also kind and thoughtful. "Your mechanic" is very fortunate to have Arturo Lopez represent your company. I enthusiastically recommend him and "Your mechanic> as a fine operation Best regards to the Team Peter Marto
Nissan Maxima - Brake Pads Replacement (Front, Rear) - San Diego, California
Arturo was prompt and completed my brake repair, including new rotors in a very efficient manner. I am very pleased with the quality of the work and the parts and will definitely look to have him service our other car in the near future.

Scott

32 years of experience
345 reviews
Scott
32 years of experience
Lexus IS250 - Brake Pads Replacement (Rear) - Denver, Colorado
Always on time, speedy, professional, and pleasant to interact with. The work is always consistent and we'll done. I can't reccomend Scott highly enough!

Michael

10 years of experience
15 reviews
Michael
10 years of experience
Nissan Sentra - Brake Pads Replacement (Front) - Conyers, Georgia
He was promptly on time and got the job done efficiently in a timely manner. I really appreciate the rapid respone on getting the job done! I would most definitely use this service again.

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