Weird Noise. Suggestions? - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

unlegendary · 09-28-2010, 11:37 PM

KA24DE, pretty much stock

Weird noise that sounds like a turbo setup without a bov but more mutilated when I shift gears at high 3k low 4k rpm.

Thought it was a throwout bearing (maybe it is?) but I can make the noise come up by just revving it to those rpm levels and it'll slowly (2-3 seconds) fade away during deceleration.

If I make the noise while driving, i can make the noise die quicker by braking.

Vacuum lines? I had a friend listen under the hood and it seems to be from the middle of the firewall. Not exactly sure where though..

Anyone got suggestions?

DatCamber · 07-07-2021, 12:11 PM

Sorry to bump this thread, but I have this exact same issue. Did you ever figure out what it was?

dizzariot · 07-07-2021, 05:18 PM

One extra click on this dude?s name would show you he hasn?t logged in since 2015.

09-28-2010, 11:37 PM	#1
unlegendary Zilvia Addict Join Date: Apr 2007 Location: with my parents Posts: 625 Trader Rating: (1) Feedback Score: 1 reviews	Weird Noise. Suggestions? KA24DE, pretty much stock Weird noise that sounds like a turbo setup without a bov but more mutilated when I shift gears at high 3k low 4k rpm. Thought it was a throwout bearing (maybe it is?) but I can make the noise come up by just revving it to those rpm levels and it'll slowly (2-3 seconds) fade away during deceleration. If I make the noise while driving, i can make the noise die quicker by braking. Vacuum lines? I had a friend listen under the hood and it seems to be from the middle of the firewall. Not exactly sure where though.. Anyone got suggestions? __________________ Full Time Student for Life

07-07-2021, 05:18 PM	#3
dizzariot Post Whore! Join Date: May 2010 Location: Japan Posts: 5,511 Trader Rating: (47) Feedback Score: 47 reviews	One extra click on this dude?s name would show you he hasn?t logged in since 2015. __________________ *The mark of a true sucka: 'RARE JDM' & 'OLD LOGO NISMO'*

07-07-2021, 12:11 PM	#2
DatCamber Zilvia Junkie Join Date: Oct 2012 Location: Southern California Posts: 316 Trader Rating: (2) Feedback Score: 2 reviews	Sorry to bump this thread, but I have this exact same issue. Did you ever figure out what it was?