How Belt Tensioners Work | YourMechanic Advice

How Belt Tensioners Work

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The drive belt tensioner in your car is a small component that works in conjunction with the serpentine belt to ensure that everything in your engine works as it should. From time to time, the tensioner should be checked to ensure that it’s set correctly. Your mechanic can do this for you as part of your routine maintenance. On occasion, it may have to be replaced.

What does the belt tensioner do?

In your engine compartment, the serpentine belt winds around various components, including your alternator, power steering pump, water pump, air conditioning compressor, and more. The tensioner ensures that the belt delivers enough tension while you’re driving, so that the belt can move the various pulleys that drive the engine components.

The parts

The drive belt tension is made up of four main parts – the base, tensioner arm, spring and pulley. The base holds the other parts, and the spring keeps the belt pulled tight. The pulley is what facilitates movement of the belt. The tensioner arm is found on the bottom of the tensioner, and if you press on it, it will work against the spring, delivering enough slack so that you can adjust or remove the belt.

Adjusting the belt tensioner

Adjusting the drive belt tensioner is not something you should attempt to do yourself – leave this job up to a pro. The serpentine belt is absolutely vital to the function of your vehicle, and if you end up with a belt problem due to an improperly adjusted tensioner, the damage can be catastrophic.


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Recent Drive Belt Tensioner Replacement reviews

Excellent Rating


YourMechanic Drive Belt Tensioner Replacement Service

Average Rating

4.9/5

Number of Reviews

663

Rating Summary
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Phillip

18 years of experience
270 reviews
Phillip
18 years of experience
Scion tC - Drive Belt Tensioner - Sacramento, California
Philip got my car back on the road!! He was very professional, knowledgeable, hard working, and explained everything that he was doing to my car. I would definitely have him work on my car again, and I will be recommending him to all of my friends and family!
Chevrolet Express 1500 - Drive Belt Tensioner - Elk Grove, California
This was my first time using Your Mechanic, and it was so much easier than trying to get your car back and forth between a shop. I will definitely be using Your Mechanic, and Philip again. Philip was prompt courteous and in and out of our lives quickly. I would definitely recommend Philip to anyone heating car help.

Mazyar

7 years of experience
255 reviews
Mazyar
7 years of experience
Ford Fusion - Drive Belt Tensioner - Decatur, Georgia
Mazyar is the best mechanic I have had! I’ve had a lot. What makes him so special is the fact that he did the job right! He didn’t cause problems and was completely honest with me. His 50 point inspection revealed all issues that I needed to fix and I knew that he was the one I wanted to do it. His is very nice and courteous and very funny! He is also very timely and got the job done within the expected amount of time. You won’t go wrong trusting him with your car.
Chevrolet Express 1500 - Drive Belt Tensioner - Atlanta, Georgia
Got the job done right, great guy. Showed me exactly what was wrong and took time to explain everything. 10 stars

Travis

12 years of experience
426 reviews
Travis
12 years of experience
Cadillac Escalade ESV - Drive Belt Tensioner - Saint Paul, Minnesota
I had a great experience I got my car fixed while I was away at work and Travis kept me updated on everything he was fixing

Rafael

26 years of experience
42 reviews
Rafael
26 years of experience
Lexus RX350 - Drive Belt Tensioner - Benicia, California
Rafael is an expert. He's careful and meticulous, knowledgeable and will stick with a difficult job until it's done, and done well.

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