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2015 RC350 - Noisy Motor?

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Old 02-10-18, 04:29 PM
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mvblum
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Default 2015 RC350 - Noisy Motor?

Although I believe this is normal as my wifes RX350 sounds a bit noisy as well there's time my car might as well be a diesel. I know it's mostly from the DI but it really makes the car seem less refined, a friend today asked if I had a stuck lifter or something else wrong with the motor when sitting idle at a stop light. I've read some posts here where some people said their cars were quiet as a mouse, if that's the case then something is definitely not right with mine. Is the noisy motor typical?
Old 02-10-18, 04:37 PM
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Hoovey689
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Is the noisy motor typical?
Simple, yes hah. tick tick tick tick tick. IS, RC, GS all the same.
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Old 02-10-18, 04:47 PM
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TuanDang
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I have been worried about the same thing. Especially if I'm driving in an enclosed area like a parking garage, I feel like l'm driving a diesel. I know direct injection can cause noise, but it seems excessive for a Lexus.
Old 02-10-18, 04:48 PM
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Would love more insight from other owners.
Old 02-11-18, 04:45 AM
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snoflewis
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im getting the DI tick, but it's nowhere near excessive or loud. it's only really noticeable when the car is fully stopped
Old 02-11-18, 09:43 AM
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Sorry should have been more clear. It's most noticeable when idling. I can hear it echo of the garage structure as I slowly drive through it. I never thought about it until my wife brought it up. Now it's always in the back of my mind.
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Old 02-15-18, 07:16 AM
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RCjets
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Totally normal Direct Injection engine noise. RPM's are low at idle, so the slower time between cylinder fuel/ignition cycles makes the noise more pronounced.
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Old 02-15-18, 08:27 AM
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Thanks RCJets. Love this forum!
Old 02-16-18, 02:50 PM
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Originally Posted by RCjets
Totally normal Direct Injection engine noise. RPM's are low at idle, so the slower time between cylinder fuel/ignition cycles makes the noise more pronounced.
So you're telling me this is normal?

Old 02-17-18, 07:37 AM
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mvblum
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Originally Posted by Salazar
So you're telling me this is normal?
No doubt louder than my 350 but I can't comment on how loud the 200 motors should be, overall I think it's a place Lexus needs to spend some development $$$ in making the motors quiet. It's disappointing to hear how loud the cars are for their price point and target audience.
Old 02-17-18, 07:52 AM
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Originally Posted by Salazar
So you're telling me this is normal?
Absolutely. A smaller four cylinder engine will always idle louder versus the V6 in the RC350.

The direct injection tick is still noticeable even here. Only difference is there's less vibration.
Old 02-17-18, 10:26 AM
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Salazar
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Originally Posted by fb182
Absolutely. A smaller four cylinder engine will always idle louder versus the V6 in the RC350.

The direct injection tick is still noticeable even here. Only difference is there's less vibration.
https://www.youtube.com/watch?v=G5YeJDYOgs0
Why is it only much louder intermittently? Please compare my previous video with this one below:

Old 02-17-18, 12:28 PM
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After comparing the two videos it does sound noisier with some clattering going on. Does the noise go away when the engine is fully warmed up?
Old 02-17-18, 12:30 PM
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Salazar
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Originally Posted by fb182
Absolutely. A smaller four cylinder engine will always idle louder versus the V6 in the RC350.

The direct injection tick is still noticeable even here. Only difference is there's less vibration.
https://www.youtube.com/watch?v=G5YeJDYOgs0
Originally Posted by fb182
After comparing the two videos it does sound noisier with some clattering going on. Does the noise go away when the engine is fully warmed up?
The opposite, actually. Seems to happen when the engine is fully warmed up and then idling.
Old 02-19-18, 03:31 PM
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Salazar, I would say your issue is not normal due to being abnormally loud - as you inquired in your other post...
https://www.clublexus.com/forums/rc-...dle-noise.html


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