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#3255690 - 01/21/14 09:02 PM Neighbor's loud RX350
mclasser Offline


Registered: 04/13/13
Posts: 378
Loc: DC
My neighbor got a new RX350 and was showing it to me the other day. We did a cold start in the morning and I was surprised at how loud the engine was. The temp. was in the low 30s and I know the engine is loud first thing in the morning, but still. We took it for a spin and the engine ultimately quieted down; I didn't expect a Lexus to be like this. I don't think my 12 yr old Accord is even that loud in the morning and Honda's are known to be noisy when cold.
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#3255751 - 01/21/14 10:11 PM Re: Neighbor's loud RX350 [Re: mclasser]
vssjim Offline


Registered: 10/05/11
Posts: 350
Loc: McLean, Va.
If it's direct injection they are louder and newer toyota v6's are on the noisy side any way.

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#3255790 - 01/21/14 11:16 PM Re: Neighbor's loud RX350 [Re: vssjim]
Nick R Offline


Registered: 07/14/09
Posts: 10571
Loc: NEO
Originally Posted By: vssjim
If it's direct injection they are louder and newer toyota v6's are on the noisy side any way.


+1. My focus, and the traverse are both DI and are pretty noisy when cold. A lot of it has to do with the Fuel injectors, and a lot also has to do with the ignition and valve timing when cold. Modern engines are programmed to severely retard the timing, to get EGT up, to help "light off" the catalytic converters quicker. Most newer engines also use much lighter, thinner exhaust manifolds, which make this much more noticeable audibly.
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#3256069 - 01/22/14 10:02 AM Re: Neighbor's loud RX350 [Re: mclasser]
SteveSRT8 Offline


Registered: 10/10/08
Posts: 15115
Loc: Sunny Florida
Originally Posted By: mclasser
My neighbor got a new RX350 and was showing it to me the other day. We did a cold start in the morning and I was surprised at how loud the engine was. The temp. was in the low 30s and I know the engine is loud first thing in the morning, but still. We took it for a spin and the engine ultimately quieted down; I didn't expect a Lexus to be like this. I don't think my 12 yr old Accord is even that loud in the morning and Honda's are known to be noisy when cold.


x a dozen! Most DI vehicles I have heard are quite noisy, especially when first started.

Our neighbor has a beautiful new blue BMW with the 2 liter 4 banger, and it sounds just like a diesel when you first crank it up!
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#3256100 - 01/22/14 10:34 AM Re: Neighbor's loud RX350 [Re: mclasser]
KrisZ Offline


Registered: 12/23/06
Posts: 4267
Loc: Toronto, Canada
Yes, lots of those DI engine have that diesel-y sound to them at idle even when fully warmed up.
I always notice this in the summer when driving with my windows down. Usually if a DI car sits next to me at a red light, I will hear that engine over mine.
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#3256612 - 01/22/14 06:43 PM Re: Neighbor's loud RX350 [Re: mclasser]
CBR.worm Offline


Registered: 05/10/05
Posts: 1422
Loc: Jupiter, Fl
My sister in law got a new RX350 - it makes a lot of noise at idle. My brother's new 328i sounds like a diesel.

I like it, it makes my piston slap more acceptable...
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#3256622 - 01/22/14 06:56 PM Re: Neighbor's loud RX350 [Re: mclasser]
mclasser Offline


Registered: 04/13/13
Posts: 378
Loc: DC
I don't think the RX350 comes with direct injection.
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#3256624 - 01/22/14 06:56 PM Re: Neighbor's loud RX350 [Re: mclasser]
friendly_jacek Offline


Registered: 05/04/03
Posts: 5338
Loc: southeast US
LOL how many people jumped on the DI bandwagon while the RX350 has no DI engine (2GR-FE). It's classic:
http://en.wikipedia.org/wiki/Groupthink

Yes, that engine is generally noisy and some units are noisier than others (piston slap). I posted about mine a few time here.

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#3256636 - 01/22/14 07:03 PM Re: Neighbor's loud RX350 [Re: mclasser]
Eddie Offline


Registered: 12/07/03
Posts: 6755
Loc: Florida, Cape Coral
If like my Mazda, extra fuel is injected to heat up the cat quickly. Mine quites down after ~ 1 minute.
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#3256678 - 01/22/14 07:34 PM Re: Neighbor's loud RX350 [Re: mclasser]
rslifkin Offline


Registered: 06/27/10
Posts: 2218
Loc: Stamford, CT / Rochester, NY
The comment about thinner exhaust manifolds is definitely a valid one. When I put headers on the Jeep, it gained a definite tick to the exhaust note, even after I made sure the header flanges were sealing properly. The thick cast iron manifolds were enough to block a lot of the ticking type noise on the exhaust pulses while the thinner walled headers let more of it escape.
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#3257214 - 01/23/14 09:22 AM Re: Neighbor's loud RX350 [Re: mclasser]
Hokiefyd Offline


Registered: 06/24/04
Posts: 11407
Loc: North Carolina
Toyota's GR-series V-6 has always sounded like it was lubricated by marbles, at least to me. I've never cared for the way it sounds inside or outside the car.
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