Skip the auto shop - Our mechanics make house calls

Q: how to remove the spring loaded belt tensioner the serpentine belt is kept tight with.

asked by on

i replaced the serpentine belt a year ago and now the belt is so loose that i can easily grasp it between my thumb and finger and can turn it 180 degrees plus between the two top driver side pulleys.when idling my alternator is not supplying enough voltage to keep the battery fully charged.i think this is because the belt is so loose. i removed the belt and the pulley but i don't know how to remove the spring loaded piece. your advice would be greatly appreciated.a mechanic friend told me that the spring loaded tensioners can get full of debris and rust so that they no longer hold the belt tight enough.thanks in advance for your help!!! norman

My car has 140000 miles.
My car has an automatic transmission.

Hey there. You will need to remove the entire housing that contains the spring. Belt tensioners are replaced as a unit. In the case of the 4.7L Toyota Motor, you will need to remove a couple of the plastic timing covers to allow the tensioner assembly to slide out and off of its studs. Once you remove the timing covers, you will be able to see the entire assembly and identify which bolts and nuts must be removed to remove the tensioner. You may need to remove the fan belt pulley to remove one or more of the covers. I suggest purchasing a new one first, then you will be able to see all that needs to happen. If you should need help with this project, or would simply like it to be done for you, have a certified technician from YourMechanic come to your car’s location to assist with your drive belt replacement.

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!
  • Home
  • Questions
  • how to remove the spring loaded belt tensioner the serpentine belt is kept tight with.

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: When you replace a alternator is the alternator drive belt also replaced?

The serpentine belt is not always replaced when the alternator is replaced. The belt should of been inspected for the need to be replaced. If any damage or cracks in the belt ar found then the belt should of been...

Q: Fuel burning rich, black smoke

As you may know the oxygen sensors which are part of your emissions system read exhaust gases to determine whether or not the appropriate amount of oxygen is present in the exhaust. Based upon this reading, this information is relayed...

Q: key won't turn

You should be ale to have the ignition switch re-keyed to fit the same keys as the keys that open your door locks. You may need to take this to the dealer to have this done to be sure they...

Related articles

How Do Power Car Windows Increase Passenger Safety?
Power windows are responsible for approximately 2,000 emergency room visits every year. When a power window closes, it exerts enough force to bruise or break bones, crush fingers, or restrict an airway. Though...
P0052 OBD-II Trouble Code: HO2S Heater Control Circuit High (Bank 2 Sensor 1)
P0052 code definition HO2S Heater Control Circuit High (Bank 2 Sensor 1) What the...
P0240 OBD-II Trouble Code: Turbocharger Boost Sensor B Circuit Range/Performance
P0240 code definition Turbocharger Boost Sensor B Circuit Range/Performance What the P0240 code means P0240 is an OBD-II generic code triggered when the Engine Control Module (ECM) detects the intake boost...