Engine Noise Under Load
Thread Starter
Driver School Candidate
Joined: Mar 2011
Posts: 13
Likes: 0
From: KY
Engine Noise Under Load
I'm hearing a noise that I do not think is normal (at least I don't recall hearing it before). It happens under load at high RPMs and the best way I can describe it is a sound like a vibration sound a blown tweeter speaker would make. It is addition to, and rises and falls with, the deeper "regular" engine sound, It only lasts for a very brief period when the RPMs are at their peak. It definitely sounds like it is coming from under the hood.
I do not hear it under regular traveling or acceleration. I only hear it under hard acceleration.
Any thoughts on it.
Thank you.
I do not hear it under regular traveling or acceleration. I only hear it under hard acceleration.
Any thoughts on it.
Thank you.
Last edited by raott; Oct 20, 2016 at 08:58 AM.
Driver School Candidate
Joined: May 2016
Posts: 5
Likes: 0
From: BC
I'm hearing a noise that I do not think is normal (at least I don't recall hearing it before). It happens under load at high RPMs and the best way I can describe it is a sound like a vibration sound a blown tweeter speaker would make. It is addition to, and rises and falls with, the deeper "regular" engine sound, It only lasts for a very brief period when the RPMs are at their peak. It definitely sounds like it is coming from under the hood.
I do not hear it under regular traveling or acceleration. I only hear it under hard acceleration.
Any thoughts on it.
Thank you.
I do not hear it under regular traveling or acceleration. I only hear it under hard acceleration.
Any thoughts on it.
Thank you.
Pole Position
Joined: Feb 2015
Posts: 259
Likes: 4
From: California
So I'm not insane I've heard it to and it usually does happen at higher RPMs. I feel like it comes and goes with my car. I had thought it was from my stereo but after the trip to the dealer I realized they were no help.
Lexus Test Driver
Joined: Mar 2016
Posts: 9,510
Likes: 2,577
yeah if it's 200t it's normal right before a shift at heavy or partial throttle. it's the turbo relieving itself of pressure dumping back into the intake. normal turbo stuff
the engine isnt as noise free as i expected a lexus to be. that sound is normal i get it but the car also since new rattles from a stop. i'm told by the dealer and as i may suspect that it's the waste gate. don't know. . do other 200t owners get that?
the engine isnt as noise free as i expected a lexus to be. that sound is normal i get it but the car also since new rattles from a stop. i'm told by the dealer and as i may suspect that it's the waste gate. don't know. . do other 200t owners get that?
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Thread Starter
Driver School Candidate
Joined: Mar 2011
Posts: 13
Likes: 0
From: KY
Thanks for the input all. Not a turbo (2016 IS 300 f sport) and does not specifically happen when cold. I can reproduce it whenever I want, just put the car under a quick hard load and it will do it when the RPMs get high -smooth idle to high RPMs doesn't seem to do it. Tried to get an audio sample but the phone wasn't picking it up.
Taking it in the morning for service and will see if it is a problem. I'll post back.
Taking it in the morning for service and will see if it is a problem. I'll post back.
Last edited by raott; Nov 3, 2016 at 11:36 AM.
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Thread Starter
Driver School Candidate
Joined: Mar 2011
Posts: 13
Likes: 0
From: KY
Finished with my appointment. Couldn't recreate the noise on my way to the dealership. They took it for a drive and couldn't recreate it. Got my oil changed, paid and left, and immediately was able to recreate the noise, so I headed back and the shop foreman took a ride with me.
I was able to recreate the noise while he rode, but he and I both agreed, after careful listening, it is not coming from the engine. It is a vibration, in tune with the engine, but sounds like it is coming from the console area and because it only lasts for a split second, it is almost impossible to pinpoint. We first thought it was coming more from the center console area but upon further listening it seemed to be coming more to the left. I've describe it as the sound a blown tweeter would make or even vibrating coins.
I did get an audio recording of it that I'll post over the weekend when I get home.
For now, I'll probably just monitor, it is not really much of a nuisance even, I was mostly concerned if it was the engine.
I was able to recreate the noise while he rode, but he and I both agreed, after careful listening, it is not coming from the engine. It is a vibration, in tune with the engine, but sounds like it is coming from the console area and because it only lasts for a split second, it is almost impossible to pinpoint. We first thought it was coming more from the center console area but upon further listening it seemed to be coming more to the left. I've describe it as the sound a blown tweeter would make or even vibrating coins.
I did get an audio recording of it that I'll post over the weekend when I get home.
For now, I'll probably just monitor, it is not really much of a nuisance even, I was mostly concerned if it was the engine.
Driver School Candidate
Joined: Dec 2016
Posts: 9
Likes: 0
From: British Columbia
Hi Raott,
I think I'm experiencing the exact same noise that you've noticed in your IS 300:
Were you able pinpoint and correct the problem? If so, I'd really appreciate any help you could give me.
Thank you!
I think I'm experiencing the exact same noise that you've noticed in your IS 300:
It is a vibration, in tune with the engine, but sounds like it is coming from the console area
Thank you!
Lead Lap
Joined: Aug 2011
Posts: 4,689
Likes: 543
From: Ca
Today, this large capacity Lexus 3.5L V6 engine is using thin oil @ 0W 20 to reduce the fuel consumption, however this thin oil causes more NVH issues.
Try a thicker grade oil, but still within the acceptable limits detailed in your Lexus Owner's Manual.
Try a thicker grade oil, but still within the acceptable limits detailed in your Lexus Owner's Manual.