Engine whine noise

[halveyp]

Hi there. I have a 2005 Toyota Corolla LE, automatic. It has about 40k miles on it. Recently I've heard a strange whine/whistle coming from the engine. I only hear it when I'm doing speeds over 45-50 mph. If I take my foot off the gas it goes away and comes back as soon as I engage the gas. It seems to diminish somewhat if I'm going over 70 mph. I took it to the dealership where I bought it and they were stumped and told me to take it to a Toyota specialist. Let me know if you have any ideas. Thanks.

[rockwood84]

could be a cracked vacumn hose

[Beryl]

Hi! I'm a new member in this forum and I'm from the Philippines, an owner of a toyota corolla gli 1993 model. I have exactly the same problem. Whenever my speedometer reaches 70-80kms/hr there is a whining noise but as soon as I reduce the speed the noise goes away. It has been this way for more than 2 years now.
I've been to many mechanics and they have done several adjustments to the wheel assembly, changing of pulleys and belts and even a top engine overhaul but to no avail. This is a puzzle to most mechanics here.

Were you able to solve your problem? Appreciate if you could share the solution

[JennyDee]

My 2005 CE Corolla is doing the same thing. I've noticed the whining noise goes away when you shift into neutral from drive at 40 mph. I suspect that if it was vaccum related the noise would not go away just by shifting into neutral. MY CE is a automatic, but the noise reminds me of a "throw-out beairng" on a standard that I hand many years ago. I have a feeling that it is the idler bearing on the tension pulley. When you back off on the throttle the noise goes away, so I associate that with the idler pulley bearing being unloaded and the noise comes back when you step on the throttle.

Originally Posted by Beryl

Hi! I'm a new member in this forum and I'm from the Philippines, an owner of a toyota corolla gli 1993 model. I have exactly the same problem. Whenever my speedometer reaches 70-80kms/hr there is a whining noise but as soon as I reduce the speed the noise goes away. It has been this way for more than 2 years now.
I've been to many mechanics and they have done several adjustments to the wheel assembly, changing of pulleys and belts and even a top engine overhaul but to no avail. This is a puzzle to most mechanics here.

Were you able to solve your problem? Appreciate if you could share the solution