Skip the auto shop - Our mechanics make house calls

Q: What Does the Accessory Belt on the Front of an Engine Do?

asked by on

What does the accessory belt on the front of an engine do?

The accessory belt is used to turn any accessory by the crankshaft of the engine any time the engine is running, without having a direct mechanical connection. The belt is used by the engine to turn all the accessories at different speeds depending on the pulley sizes used. The types of accessories commonly driven by the accessory drive belts are the water pump, air conditioning compressor, alternator, power steering pump, and air injection pumps. If an engine is equipped with a supercharger then it is most likely driven by an accessory belt.

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. What Does the Accessory Belt on the Front of an Engine Do?

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: We are replacing rhe water pump and the special tool is not working it just keeps slipping the water pump is very rusty need help

The replacement of the water pump on your vehicle is more complex than the average vehicle and does require a special GM tool (J 38816-A Water Pump Remover & Installer), therefore if you desire you can request that a certified...

Q: Replaced power steering pump, high pressure line, put new fluid - what else can the noise be?

Hi there, thank for writing in. You may have a small pin hole in the oil line from the reservoir to the pump. The pin leak will introduce air into the pump and cause the fluid to get air in...

Q: The engine klunking and tapping, needs engine replacemet

The reason the shops told you to replace the engine is that they do not overhaul engines. They can only replace it for you with a remanufactured or used engine. An overhaul is a third option but would most likely...

Related articles

Rules of the Road For Iowa Drivers
Driving on the roads requires knowledge of the rules, many of which are based on common sense and courtesy. However, even though you know the rules in...
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.