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Auxiliary Drive Belt Tensioner Replacement
Typical Cost: Low
Mobile Repair? Yes
Typical Lead Time: 24 - 48 hours depending on part availability
Please note that the term auxiliary drive belt tensioner is the correct name for the serpentine belt tensioner , fan belt tensioner , alternator belt tensioner and power steering belt tensioner.
What is an auxiliary drive belt tensioner?
The auxiliary drive belt tensioner is a vital part of the drive belt system that runs your ancillary devices such as the alternator, power steering pump, water pump etc.
The auxiliary drive belt tensioner is usually a guide wheel, that has a high tensile spring mechanism, that keeps the auxiliary drive belt tight against the pulleys.
How does the auxiliary drive belt tensioner work and what are the components?
The auxiliary drive belt tensioner is either directly bolted to the engine or to a bracket that is secured in place to the engine. The tensioner usually consists of a flat surface roller, that uses a strong spring to pull the belt tight on to the roller and therefore tight against the other pulleys on the circuit.
Typical symptoms that require an auxiliary belt tensioner to be replaced.
- When squeaking noise occurs under the bonnet when starting the car.
- When the belt slips when the engine runs (high-pitched squeaks).
- If the auxiliary drive belt start to resonate or run out of alignment
What happens during an auxiliary belt tensioner replacement?
Changing an auxiliary belt tensioner is a routine repair for all mechanics and can be done both kerbside as well as in the workshop, providing it is safe to do so.
Whilst there are variations between manufacturers, the basics are pretty similar.
The mechanic will;
- Check for an unusual noise coming from the engine.
- Inspect the auxiliary drive tensioner and other belt pulleys.
- If necessary, replace the belt tensioner.
- Advise if any other parts need to be replaced, like the auxiliary belt itself.
- Test the auxiliary drive belt system.
- Make any adjustments if necessary.
What does this repair cover?
Unless otherwise stated, the quote for your auxiliary belt tensioner to be replaced will cover;
- The cost of the belt tensioner
- Coming to you
- Fitting of the parts
- Disposal of the old parts (unless you request to keep them)
- VAT (if applicable)
- 12 months parts and labour warranty
What to search for on the ClickMechanic site?
Auxiliary drive belt tensioner replacement
Associated repairs
Auxiliary drive belt replacement
How much does it cost to have an auxiliary belt tensioner replaced?
The cost of an auxiliary belt tensioner replacement depends on your car and what parts your car's manufacturer recommends.
Find out what you could save by visiting ClickMechanic
https://www.clickmechanic.com/bookings/car
FAQ’s
Can I supply my own parts?
No, we will not fit customer supplied parts unless they are a brand new item, purchased from a dealership with the receipt as proof of purchase. There is no flexibility over this due to insurance and warranty issues.
What happens if the mechanic finds that the auxiliary belt tensioner doesn’t require changing and the problem is due to another issue?
In this scenario, the mechanic will provide a no obligation quote for the correct repair. Should you accept this, the mechanic can alter the booking accordingly. If you decide not to go ahead with the alternative repair, the mechanic can change the booking to a call out and diagnostic booking and charge according to the time spent with the vehicle and call out.