Skip the auto shop - Our mechanics make house calls

Q: Lost tension on the tensioner

asked by on

I went to change alternator after everything was done, started it up and serpentine belt came off. Looked under seen that i lost all tension in the tensioner bar.
My car has a manual transmission.

Hi there:

This actually happens more often than you might think and is caused by one of two things. Either the tensioner is not properly aligned and installed correctly or it was damaged when the serpentine belt broke. In either case, since the serpentine belt broke, you should replace the tensioner, the pulleys and the serpentine belt to ensure this doesn’t happen again.

Was this answer helpful?

Need advice from certified mechanic? Get help now!

Over 1000 mechanics are ready to answer your question.
The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details

Ask a Mechanic
(100% Free)

Have a car question? Get free advice from our top-rated mechanics.

Ask A Mechanic
Over 10,000 questions answered!
  1. Home
  2. Questions
  3. Lost tension on the tensioner

Get an instant quote for your car

Our certified mechanics come to you ・Backed by 12-month, 12,000-mile guarantee・Fair and transparent pricing

Get a quote

What others are asking

Q: Front brake pads and rotor.

When it comes to brake repairs, the car will need to undergo a break-in period to seat the pads to the rotors. This should clear any minor squeal you may be hearing. If the noise continues after at least a...

Q: My breaks are going all the way in and not breaking as fast as usual. I have to pump them to make them work properly. My break flu

Hi Krystal. Thanks for contacting us tonight. When you have a brake issue like you've described, it's typically caused by a brake master cylinder problem or air bubbles in the brake fluid lines. If the fluid is low, this can...

Q: My car is having an RPM issue

Hello. It sounds like you are having idling issues. This may be related to a sensor, the accelerator, or the the ignition system. You may want to start by scanning the vehicle for diagnostic troubleshooting codes. Even if a warning...

Related articles

What Causes Hoses to Leak?
While the largest part of your engine is mechanical, hydraulics plays a significant role. You’ll find fluids at work in a number of different areas. Your car's fluids include: Engine oil Transmission...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
What are the Car Pool Rules in Hawaii?
Hawaii is widely regarded as a land of vacation and relaxation, and as such, its scenic roads and routes are far better known than the state’s freeways. But, as with all...