Skip the auto shop - Our mechanics make house calls

Q: Alternator belt noise when running the air conditioning

asked by on

My 2003 honda odyssey, about 95,000 miles is making noise (Belt) whenever I turn the air conditioning on. My mechanic sprayed some wd40 on the belt (not sure which one) and the sound temporarily went away. now it is back. My mechanic says to wait changing the drive belts when it is time(105000) to change the timing belt, and believes the problem is the belt, and that I can wait another 10000 miles to do it. He doesn't believe leaving it the way it is now will hurt the car. I have not changed the timing belt. I did all the routine maintenance work. Air filters, oil and filter, spark plugs. Is my mechanic right?

My car has 95000 miles.

A: Hello. Noise signifies a problem. The probl...

Hello. Noise signifies a problem. The problem could be a worn belt but the noise could also be due to a faulty tensioner, misaligned pulleys, or glazing on the belt which by the way in certain configurations will result in the accessory drives running below intended speed due to belt slippage.

It’s hard to say what effect WD-40 might have had in possibly masking these other problems, if they exist, and the reality is you can’t keep spraying the belt. In essence, the mechanic is suggesting that the diagnosis be put off for six months to a year (10,000 miles). That is you won’t know for sure if it is just the belt "alone" and not a weak tensioner or a pulley issue for some time to come.

Generally, unperformed maintenance and failure to perform repairs that are needed brings one on to the proverbial slippery slope. It is better to just repair it now if it is a known issue than to wait and wonder. If it were me, I would just fix it now.

If you’d like a fresh pair of eyes on the situation, consider YourMechanic, as one of our mobile technicians can come to your home or office to diagnose the sound you’re hearing for an accurate repair.

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: Thumping noise while driving

Hello. It is possible that the noise you are hearing is caused by a bad wheel bearing. However, the wheel bearing noise usually sounds more like a roar. If it is a bad wheel bearing, the roaring noise will become...

Q: Where is the camshaft sensor position A in a 2008 Honda Odyssey 3.5L V6 engine?

Facing the motor in the van you will find the sensor in the front of the rear of the cylinder head. That would be passenger side of the rear head. Mounted in the end of the head.

Q: Honda Adas shakes at 60-70 mph even though it's been serviced

First, you will want to ask how much you trust the front alignment guys. If those guys did that and it still shook, it's worth noting that the Hondas Adas had all kinds of problems with their automatic transmissions. A...

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...
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...
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...