Skip the auto shop - Our mechanics make house calls

Q: Belt problem, maybe a pulley problem?

asked by on

Last year while I was driving my 2007 Ford Fusion, a belt broke under the hood and I had to get the car towed to a shop to replace it along with the idler pulley. Just recently, the same exact thing happened! I can’t keep replacing both parts every year, so how can I prevent this from happening again?

A: Nothing ruins a nice drive down a scenic ro...

Nothing ruins a nice drive down a scenic road, or worse yet, a rush hour commute, like the serpentine belt deciding to make a run for it. Matters are further complicated when the problem goes further than the belt. There’s good news and bad news, so let’s start with the bad news and end on a high note. The bad news is you are one of MANY Fusion owners to experience the same frustration with your idler pulley. It seems the threaded mount for the idler pulley wasn’t given enough rigidity to hold the idler pulley bolt as firmly as necessary. This leads to the threads becoming wallowed out, and eventually, bolt failure. Now, the good news is after many failures, some intrepid technician somewhere discovered a suitable fix. By using a longer bolt and a nut, rather than relying on the threads in the block, the bolt maintains the proper dimension with the engine and does not break under load. I would advise having a technician inspect the threads in the block. If in fact the threads are damaged, this technique may mean the difference between repeated repairs and a lasting relationship between your idler pulley bolt and you.

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・Save up to 30%

Get a quote

What others are asking

Q: Hydraulic chain tensioner not working.

Hi there. If the tensioner was removed, then when the engine cranked over the camshaft would not move causing the piston to come in contact with the valves. Then there would be a serious problem with the engine. Most likely...

Q: Jolts, jerks & disengagement of transmission

There are many different technical service bulletins that may pertain to the problems in your transmission system. The different bulletins cover anything from reprogramming the transmission module to replacing the transmission. My recommendation is to have the vehicle tested and...

Q: How do you adjust the power front seat?

Depending on the trim level of your car, you may have a power front seat rather than a manual seat. This offers more customization in terms of seating position, as well as less effort required to adjust the seat. Here’s...

Related articles

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...
How to Avoid Back Pain in a Car
If you have back problems, sitting in a car for an extended period of time can be excruciating. Even without back problems, you could experience discomfort and soreness from...
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...