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

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: Belt keeps comming off at ps pump replaced pump and tensioner

The most common cause of these belts coming off is the belt alignment is off. Using a straight edge or long ruler put it against the pulleys and see if one is out of alignment. The PS pulley may not...

Q: AC leak on a 2008 Prius

Understand that's a Prius and that car has an AC compressor that works on hundreds of volts electricity. It's an electric compressor. It uses special fluids, too. You can't use the regular AC fluid as it will short it out....

Q: Truck starts on the 'ON' position.

Hi there. There is a loose power or ground wire to your vehicle that is causing all of the issues. The wiring could be shorting out with your starter circuit causing the vehicle to start in the 'ON' position and...

Related articles

How Long Does a Heater Control Valve Last?
Keeping the right amount of coolant in a car is essential in keeping the engine at the right temperature. Failing to have the right amount of coolant or even bad elements...
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...
P2103 OBD-II Trouble Code: Throttle Actuator Control Motor Circuit High
P2103 means there is a fault with the throttle actuator control motor circuit, likely due to a defective electrical component or part.