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.

A: Hey there. You will need to remove the enti...

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!

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: 2003 Sonata starts then will stall. I have to wait ten minutes then it starts right up?

Check the belt and see if its loose or too tight. A drive belt that is loose or too tight can cause the alternator to not function properly and make the battery get low on voltage causing a no start...

Q: Car hesitates on acceleration

Hello. If your Check Engine Light is flashing that usually indicates that there is an engine misfire. Since the light is coming on I would start by scanning the computer for codes. The codes will help me to determine where...

Q: I am considering buying a vehicle with high mileage, do you have an opinion about high mileage vehicles?

For a vehicle with this many miles you should have an inspection done on your end by a certified mechanic, like one from YourMechanic, to do a pre-purchase inspection to make sure you are not wasting money on a vehicle...

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 Long Does a Distributor O Ring Last?
The distributor is part of the ignition system in your vehicle and its purpose is to route high voltage from the ignition coil to the spark plug. The spark plug then...
P2428 OBD-II Trouble Code: Exhaust Gas Temperature Too High Bank 1
P2428 code definition A P2428 trouble code signifies that the PCM has detected a problem in the exhaust gas temperature sensor circuit in bank 1, which subsequently contains the number one...