Engine noise remedies
- Thread starter thesahl
- Start date
Some people dislike the engine sound. I don’t mind it at all.
An air filter doesn’t muffle engine noise. Exhaust system changes would make some difference but most of what you’re hearing from inside the cabin is just the sound of the engine itself.
An air filter doesn’t muffle engine noise. Exhaust system changes would make some difference but most of what you’re hearing from inside the cabin is just the sound of the engine itself.
Most of the noise of this engine comes from the valve train, high pressure fuel pump and direct injectors. There is little that can be done about it. The classic solution would be a noise-absorbing engine "beauty cover" - like most Toyotas and Lexuses used to have in the past, but Toyota no longer puts them in some of their vehicles. For example Toyota Grand Highlander, which has the same T24A engine, has one - see pic. It seats right on top of the valve cover and helps to cut the valve clatter by half. The downside is that it also keeps the plastic valve cover, ignition coils, etc. hotter, which isn't good for longevity.
An alternative could be cover the underside of the hood and the firewall with sound absorbing material. The hood already comes with some padding, but a better, more absorbing material could lower the noise by a few dB. Caveat is that it also has to be temperature resistant - you don't want it to catch fire. You can find some options here Sound & Heat Barriers - Page 1 - Thermo-Tec Automotive
An alternative could be cover the underside of the hood and the firewall with sound absorbing material. The hood already comes with some padding, but a better, more absorbing material could lower the noise by a few dB. Caveat is that it also has to be temperature resistant - you don't want it to catch fire. You can find some options here Sound & Heat Barriers - Page 1 - Thermo-Tec Automotive
Here's another type of sound deadening material for underhood applications
www.dynamat.com
Sound Absorption For Your Vehicles Engine Noise | Hoodliner | Dynamat
Dynamat Hoodliner is specifically built to absorb engine noise from your vehicles engine bay. Maximum noise control for maximum comfort.
www.dynamat.com
- Thread starter
- #6
Thank you very much for the info. This is very helpful.
Thanks for the link! Super tempted if I wasn't such a stock naziHere's another type of sound deadening material for underhood applications
Sound Absorption For Your Vehicles Engine Noise | Hoodliner | Dynamat
Dynamat Hoodliner is specifically built to absorb engine noise from your vehicles engine bay. Maximum noise control for maximum comfort.
With the windows up or down the engine makes very little noise. I guess its all relative.
Run the windows up and keep the stereo on, open the sky light a bit, you wont hear any engine noise.
Maybe the trim levels change the sound. Mine is very very quiet, too quiet actually.
Run the windows up and keep the stereo on, open the sky light a bit, you wont hear any engine noise.
Maybe the trim levels change the sound. Mine is very very quiet, too quiet actually.
I actually like the sound of the engine. It sounds a bit raw on start-up which I like. Then I can't hear it the rest of the time I'm driving.
I don't mind the sound of the engine .. but mine got noticeably quieter with the first oil change (I also added a liquid moly anti-friction treatment)
After my first oil change around 1,000 miles, I noticed a significant change in the engine overall. It seemed to smooth out and run better. The break-in period is real.
Any risks to the engine by adding the moly?
I wouldn't risk it. It's a new engine and shouldn't need such additives. Just use a high quality oil.
That’s what I thought.
Mobil 1 bottles the Toyota motor oil, for Toyota. So I will stick with one of those.
I think there is a cultural aspect to the LC engine noise.
The LC sounds like a typical 4-cyl engine - (very) quite at steady speed, but raspy, "sewing machine" sound when pressed hard.
American drivers are used to V6 and V8 engine sound, which in general is softer and "deeper". European and Asian drivers are used to 4-cyl engines and actually like a bit of "vroom-vroom" when stepping on the gas pedal. Manufacturers put a lot of engineering into how the engine sounds and try to meet consumers preferences. That's why some luxury vehicles even come with fake engine sound that is produced by the car's infotainment system, and can tailor to a specific market.
BTW, this "raspy" sound isn't unique to the LC. Most new Lexus models also suffer from the same "complaint".
The LC sounds like a typical 4-cyl engine - (very) quite at steady speed, but raspy, "sewing machine" sound when pressed hard.
American drivers are used to V6 and V8 engine sound, which in general is softer and "deeper". European and Asian drivers are used to 4-cyl engines and actually like a bit of "vroom-vroom" when stepping on the gas pedal. Manufacturers put a lot of engineering into how the engine sounds and try to meet consumers preferences. That's why some luxury vehicles even come with fake engine sound that is produced by the car's infotainment system, and can tailor to a specific market.
BTW, this "raspy" sound isn't unique to the LC. Most new Lexus models also suffer from the same "complaint".
Not any that I care about .. and my MPG went up 1.5
I think it’s part of the charm of the car. But I understand where it might be different than some people are used to and therefore offputting.
I would not recommend an aftermarket exhaust. Those won’t change the way the engine sounds as much as amplify its existing character. And they all drone.
I would not recommend an aftermarket exhaust. Those won’t change the way the engine sounds as much as amplify its existing character. And they all drone.
