post #1 of 9 (permalink) Whistling Sound After Replacing Timing Belt post #2 of 9 (permalink) You may be hearing the infamous transmission whine. High Pitch Whine Sound at Speeds Below 30mph high pitched noise when accelerating only? post #3 of 9 (permalink) post #4 of 9 (permalink) 75Blazer, I am sorry, but not one of those links bring up anything about a whining transmission or engine. 2005 Honda Pilot EX post #5 of 9 (permalink)If whining, does it match RPMs and sound something like the video? If so, perhaps it's the alternator, and you should heed the whine. 2006 EX-L w/RES (black) Previous: 1999 Chevrolet Blazer (beige); 1996 Pontiac Transport (green); 1992 Dodge Caravan (red); 1988 Honda Lead 90 [in Japan, see avatar] (black); 1985 Dodge Mini Ram Van (gray); 1979 Dodge Camper Van (blue); 1974 Fiat 128 (burgundy); 1964 Plymouth Valiant (fire engine red & midnight black) post #6 of 9 (permalink) Post a video of it happening.

I'm pretty sure all the tensioners are automatic in this gen so you can't over-tighten anything. Maybe the timing belt isn't lined up with all the marks correctly or a pulley somewhere is loose. If the engine jumps time it could destroy itself so go back to the mechanic. Check out this vid to familiarize yourself with what the mechanic did (or didn't) do: 2013 Pilot EX-L 4WD: 30K miles 2002 Accord EX-L SULEV: 200K miles 2002 Infiniti I35: 110K miles post #7 of 9 (permalink) Originally Posted by LGuzzo I'm not sure what links you're clicking. I bought a 2003 Honda pilot with 93,000 miles a week ago and notice a whining sound from the engine..." "High Pitch Whine Sound at Speeds Below 30mph I have noticed a high pitch whining sound when driving at speeds under 30mph." "high pitched noise when accelerating only? I just bought a used 2004 Pilot with 108K miles on it. I'm hearing a high pitched noise/winding when my foot is on the gas pedal."

post #8 of 9 (permalink) post #9 of 9 (permalink) Here is a video: I have a doctor's stethoscope. I'll try using that.Copyright © 1997 Hannabery HVAC. All air vents, meaning supply registers, ceiling diffusers, floor vents, and return grilles make some noise when the system fan is running. Some systems are louder than others. Some systems are much louder than others.a house with plenty of return air ducting, including return vents in every room will probably be quieter than a system with just one large return grille cut directly into the return duct of the equipment. There is nothing technically wrong with the latter, it is just a less expensive system to install and is a very basic approach to ducting the equipment. The downside of course is that it may be loud! The most common complaint we get on this matter is usually from return vents making a high-pitched, tuning-fork type of sound. This usually, not always, but usually, indicates a lack of return air.

The system needs to pull more air so the pressure and velocity increases, thus increasing the sound level. By adding more return air, the pressure drops, and the system doesn't have to work as hard, and it quiets down. Now, why do we have a lack of return air? The ductwork could be undersized or not installed properly. But it could also be as simple as a blocked air filter. Kitchenaid Commercial Mixer AustraliaMaybe someone closed off too many vents. Boxer Puppies For Sale In Silver Spring MdYes this could cause the problem as well. Buy Sell Trade Ottumwa IowaThe system is designed to move a certain amount of air. By blocking either the return or supply vents, (anything that restricts the airflow) it causes a pressure problem - increasing the sound level.

We have seen furniture blocking return vents, restricting air flow. Other vent-related noises include rattling and or flapping sounds - which are usually due to debris in the duct... screws, nails, small toys, plastic, construction materials, saw dust, and so on. So after checking all the obvious things, the next step would be to have a technician inspect the system's performance. Hannabery's service technicians can not only check the equipment, but can diagnose the ductwork for proper air-flow. Along with system pressures and temperature splits, they can check for proper CFM and static pressures to determine if the system is moving the air properly. Large return very close to unit Return vents blocked or shut off Supply vents blocked or shut off Debris in ducts - may need professional cleaning [Must be in our service area]SfC Home > Communication > Senses > by Ron Kurtus (7 March 2001) Humans and animals can sense a wide range of sound frequencies, pitches or tones.

The range of frequencies determines the person's or animal's perception of the world, as well as its ability to communicate. Questions you may have include: This lesson will answer those questions. The frequency of a sound is also known as its pitch. The higher the frequency, the higher the pitch and the shorter its wavelength. There is a range of frequencies that humans and animals can hear or detect. This is also true for any detectors of sound, such as microphones. Frequency is measured in Hertz—which means cycles per second. The abbreviation for Hertz is Hz. There is an upper and lower limit of the frequencies that each animal can hear. The following chart shows a comparison of the range of frequencies or pitches that humans and various animals can hear. Note that a frog and a mouse hear almost a completely different range of sounds. Range of hearing in Hertz A normal human can hear between 20 Hz and 20,000 Hz. That is quite a range. 20 Hz is a very low pitch sound or very deep tones.

20,000 Hz is a high pitch sound. Besides hearing low frequencies, you can often feel them. An example of that is when you can feel the bass from a loudspeaker. When humans get older, they have trouble hearing the high pitched sounds and their detection range diminishes. For example, I knew an old man who was losing his ability to hear the higher pitched sounds. He could hear my voice fine, but he had trouble hearing his wife, because her voice was at a higher pitch. She often got angry at him, because she thought he was just ignoring her. Dogs and some other animals can hear sounds at higher frequencies than 20,000 Hz. That is why people can’t hear a special dog whistle, while the dog will react to it. Being able to hear the higher frequencies may be useful in hunting for the animal. Cats can hear higher frequencies also, but most are too independent to respond to such a whistle. Elephants can hear frequencies much lower than the range of humans. Some researchers who were studying elephants in Africa discovered this.

The story goes that a herd of elephants they were observing suddenly perked up their ear and ran off in a direction, as if they heard someone calling them. The researchers said they didn't hear anything, but some said they felt something strange in their bodies, just before the elephants ran off. After studying this situation, they found that elephants could make a very low frequency sound that humans can’t hear. Elephants are able to hear this sound coming from up to 5 miles away. It is amazing the distances from while they can communicate with each other. What you hear can affect how you perceive the world around you. The whine of the vacuum cleaner may not bother you, but it can cause your dog to run and hide, because of the painful high-pitched sound that you may not be able to hear. Cats perceive a world where there are high-frequency squeaks of mice hiding in the pantry, while elephants perceive a world of low rumbles of far-away friends. Meanwhile, we perceive a world somewhere in between.