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Weird noise at idle when the clutch isnít engage, past owner just replace it

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2003-2009 Nissan 350Z

Weird noise at idle when the clutch isnít engage, past owner just replace it

Old 04-08-2019, 08:15 AM
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Richard Medina
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Default Weird noise at idle when the clutch isnít engage, past owner just replace it

I just got my Z yesterday and the car sounds like a v8 when the clutch isnít engage, I donít think itís rod knock because it goes away as soon as I step on the clutch.
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Old 04-08-2019, 08:32 AM
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travlee
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sounds like he put in a lightweight flywheel.

does it sound kinda like a cement mixer?
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Old 04-08-2019, 08:35 AM
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Richard Medina
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Default It sounds like old v8 engine

Originally Posted by travlee View Post
sounds like he put in a lightweight flywheel.

does it sound kinda like a cement mixer?
it sounds like a diesel truck or like a old v8
He put a Jim wolf clutch and flywheel
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Old 04-08-2019, 08:48 AM
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so it is a lightweight flywheel, i bet it is just chatter. post a video
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Old 04-08-2019, 11:23 AM
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^^^ What Trav said. Lightweight Flywheel = Transmission gear lash/chatter. Specifically at low RPM (<1500) while under load. You can minimize the noise by keeping your RPMs higher when shifting. Lugging the engine is never a good idea in any case, but with a lightweight flywheel it will sound like your Z is about to fly apart.
-Icer
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Old 04-11-2019, 11:45 PM
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Originally Posted by travlee View Post
so it is a lightweight flywheel, i bet it is just chatter. post a video
I posted a video already, here is the link
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Old 04-12-2019, 02:02 PM
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This is normal. You're hearing the clutch throw-out bearing. Simple test; push in the clutch pedal while listening, does the noise immediately go away? If so, noise confirmed. All 6MT 350Zs make this noise while idling in neutral with the clutch released. The bearing noise will get louder over time. A temporary fix is to replace the bearing while also replacing the clutch. If you're clutch is old/worn go ahead and take care of it, just understand that even a new bearing will start making this noise after a few weeks or months of use.

Note: If you're running with a Lightened Flywheel, the noise will be a little louder. This is because the combustion pulses through the crank aren't being absorbed as designed/intended by the heavy OEM dual-mass flywheel. This won't harm your engine or transmission, you just sacrifice some comfort (noise & vibration) for performance.
-Icer

Last edited by icer5160; 04-12-2019 at 02:07 PM. Reason: Additional info.
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