Skip the auto shop - Our mechanics make house calls
  1. Home
  2. Articles
  3. How to Replace a Serpentine Belt

How to Replace a Serpentine Belt

How to Replace a Serpentine Belt 1

The serpentine belt is connected to and moved by the engine crankshaft pulley. In turn, the belt drives all of the front-mounted engine accessories including the power steering pump, alternator, water pump and smog pump if equipped.

Over time, serpentine belts that are wearing out will become cracked and brittle, indicating it is time for replacement. Serpentine belts are extremely important because if they break, the engine will eventually stop running and you will lose power steering. In addition, a broken belt can cause engine damage if the water pump is belt driven and the engine is allowed to overheat.

Part 1 of 2: Remove the serpentine belt

Materials Needed

  • Free repair manuals - Autozone provides free online repair manuals for certain makes and models
  • Protective gloves
  • Ratchet
  • Repair manuals (optional)
  • Safety glasses
  • Serpentine belt tool (optional)

How to Replace a Serpentine Belt 2

Step 1: Locate the serpentine belt routing diagram. Locate the serpentine belt routing diagram before removing the belt. This diagram will ensure that you know how to reinstall the belt. Most of the time, the diagram is mounted somewhere in the engine compartment. If not, you’ll need to consult the factory repair information or take a picture of the belt routing prior to removal.

How to Replace a Serpentine Belt 3

Step 2: Move the tensioner. Use a ratchet or dedicated serpentine belt tool to push on the tensioner and move it away from the belt.

How to Replace a Serpentine Belt 4

  • Note: Some tensioners have a slot to insert a square ratchet head end into. Others have a traditional bolt head that you can install a socket onto.

How to Replace a Serpentine Belt 5

Step 3: Remove the belt. While still holding the tensioner away from the belt, slide the belt off the pulleys.

Part 2 of 2: Install the new serpentine belt

How to Replace a Serpentine Belt 6

Step 4: Determine how to route the belt. Look at the belt routing diagram or the picture you took to determine how to install the new belt.

How to Replace a Serpentine Belt 7

Step 5: Move the tensioner. Use a ratchet or serpentine belt tool to push on the tensioner and move it away from the belt, so the new belt can be installed on the pulleys.

How to Replace a Serpentine Belt 8

Step 6: Install the new belt. Position the new belt on the pulleys. Once the belt is in place, let go of the tensioner. Double check the belt installation against the routing diagram or the picture you took to ensure it is routed properly.

If this seems like a job you’d rather leave to a professional, YourMechanic offers expert serpentine belt replacement at a time and place of your choice.

The statements expressed above are only for informational purposes and should be independently verified. Please see our terms of service for more details
Icon-warranty_badge-02

Skip the repair shop, our top-rated mechanics come to you.

At your home or office

Choose from 600+ repair, maintenance & diagnostic services. Our top-rated mechanics bring all parts & tools to your location.

Fair & transparent pricing

See labor & parts costs upfront, so you can book with confidence.

12-month, 12,000-mile warranty

Our services are backed by a 12-month, 12,000-mile warranty for your peace of mind.

Get A Quote

Need Help With Your Car?

Our certified mobile mechanics make house calls in over 2,000 U.S. cities. Fast, free online quotes for your car repair.

GET A QUOTE

More related articles

Veteran and Military Driver Laws and Benefits in Idaho
The state of Idaho offers a number of benefits and perks for those Americans who have either served in an Armed Forces branch in the...
Auto Safety Tips
Driving is more than a way to get from point A to point B. Owning and driving a car can also be a highly enjoyable experience. Whether a person is driving...
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...


Related questions

Q: i want to get rid of the ac compressor of my 2006 toyota corolla , do i need a shorter sempertine belt or what ?

You cannot just put on a shorter belt since the a/c compressor pulley keeps the belt routing correct and bypassing it would cause belt to not turn all the other pulleys correct without tearing up the belt. You will need...

Q: Q: How to replace lower ball joints?

Hi there. To replace the lower ball joints on a 2003 Ford Taurus, perform the following steps: (1). Raise up the vehicle and put it on jack stands (2). Remove the tires that are associated with the ball joints...

Q: Regularly maintenanced car has progressive power loss - 1997 Toyota Supra

Check the basics - check compression and engine tune. Check for a dirty air filter, dirty fuel filter, proper fuel pressure, clogged exhaust or catalytic converter. A YourMechanic professional can help with the diagnosis of your vehicle's loss of power...