Whining/Screaming - Zilvia.net Forums | Nissan 240SX (Silvia) and Z (Fairlady) Car Forum

ZakS13 · 04-24-2009, 10:54 PM

have a CA18DET, all stock except everything listed below. I've been driving it the past month and its been running/driving/boosting fine. Started it up today, took my friend home, no problems.. a few minutes later, i noticed that when i would start hitting boost, there was this whinning/screaming noise like a supercharger or something? oil level, pressure, and temperature are all good. turning the elec. fan on/off didn't help, and it does it primarely in gear, and a little bit at around 6-7k in neutral. any ideas? after searching some i think it may be the turbo-manifold gasket?

also, no power steering or A/C, and does flucuate with boost. very minimal shaft play, no boost/vac leaks, and no BOV (like factory).

Pepperoni · 04-25-2009, 12:51 AM

still sounds to me like a boost leak.

GSXRJJordan · 04-25-2009, 01:42 AM

Not a boost leak most likely - possibly an exhaust leak (small)... if it's only in boost and high rpm in neutral, could be a turbo problem. When the blades scrape the housing, it sounds like 'screaming'/whining.

You should take the intake pipe off and check for shaft play.

ZakS13 · 04-25-2009, 07:24 AM

i've heard boost leak and exhaust leak. there is minimal shaft play (no more than the day i got it)

ZakS13 · 04-25-2009, 09:14 AM

i pulled the compressor outlet and there was a piece of the gasket missing. about an hour ago, i used soem Ultra Black RTV Silicone gasket maker on it. Can anything bad happen from this?

ZakS13 · 04-25-2009, 09:56 AM

turbo death whine...? - Supraforums.com

go to the last post and watch the video, thats what it sounds like.

GSXRJJordan · 04-25-2009, 02:34 PM

Haha, your tried to use RTV on a turbo gasket?

Go to your local Nissan dealer, order the metal exhaust gaskets (4 bolt and 5 bolt) for a 300zx TT, or order them online from Courtesyparts.com or mynismo.com - you can't really troubleshoot noises when you have loud ass exhaust leaks.

As far as boost leaks, I've never heard one that sounds like a "death whine", but who knows?

Bigsyke · 04-25-2009, 03:07 PM

JGS tools will have what you need, turbo gasket RTV. Works.

ZakS13 · 04-26-2009, 11:02 AM

GSX, it was on the 3-bolt outlet

GSXRJJordan · 04-26-2009, 01:39 PM

Ohhh, ok. RTV has worked well for me there, because there's on vibration.

Still don't think it should be making that noise if everything's torqued down tighter than 'hand tight' lol.

ZakS13 · 04-26-2009, 05:55 PM

i found a leak in the IC piping..fixed it & am awaiting comprehensive results

ZakS13 · 04-27-2009, 04:53 PM

confirmed it to be a boost tiny boost leak. Thanks everyone!

04-24-2009, 10:54 PM	#1
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	Whining/Screaming have a CA18DET, all stock except everything listed below. I've been driving it the past month and its been running/driving/boosting fine. Started it up today, took my friend home, no problems.. a few minutes later, i noticed that when i would start hitting boost, there was this whinning/screaming noise like a supercharger or something? oil level, pressure, and temperature are all good. turning the elec. fan on/off didn't help, and it does it primarely in gear, and a little bit at around 6-7k in neutral. any ideas? after searching some i think it may be the turbo-manifold gasket? also, no power steering or A/C, and does flucuate with boost. very minimal shaft play, no boost/vac leaks, and no BOV (like factory).

04-25-2009, 12:51 AM	#2
Pepperoni Zilvia Addict Join Date: Jun 2003 Location: norcal Posts: 750 Trader Rating: (0) Feedback Score: 0 reviews	still sounds to me like a boost leak. __________________ Turbo piping, Intakes and More: http://www.pipingpro.com

04-25-2009, 01:42 AM	#3
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Not a boost leak most likely - possibly an exhaust leak (small)... if it's only in boost and high rpm in neutral, could be a turbo problem. When the blades scrape the housing, it sounds like 'screaming'/whining. You should take the intake pipe off and check for shaft play. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

04-25-2009, 02:34 PM	#7
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Haha, your tried to use RTV on a turbo gasket? Go to your local Nissan dealer, order the metal exhaust gaskets (4 bolt and 5 bolt) for a 300zx TT, or order them online from Courtesyparts.com or mynismo.com - you can't really troubleshoot noises when you have loud ass exhaust leaks. As far as boost leaks, I've never heard one that sounds like a "death whine", but who knows? __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

04-26-2009, 01:39 PM	#10
GSXRJJordan Post Whore! Join Date: May 2006 Location: San Diego, CA Posts: 9,135 Trader Rating: (19) Rides Gallery: GSXRJJordan Feedback Score: 19 reviews	Ohhh, ok. RTV has worked well for me there, because there's on vibration. Still don't think it should be making that noise if everything's torqued down tighter than 'hand tight' lol. __________________ Jordan Innovations has a new web site! www.JordanInnovations.com -- All your favorite FD Pro Drifters love it, trust me -- www.JordanInnovations.com

04-25-2009, 07:24 AM	#4
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	i've heard boost leak and exhaust leak. there is minimal shaft play (no more than the day i got it)

04-25-2009, 09:14 AM	#5
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	i pulled the compressor outlet and there was a piece of the gasket missing. about an hour ago, i used soem Ultra Black RTV Silicone gasket maker on it. Can anything bad happen from this?

04-25-2009, 09:56 AM	#6
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	turbo death whine...? - Supraforums.com go to the last post and watch the video, thats what it sounds like.

04-25-2009, 03:07 PM	#8
Bigsyke Zilvia FREAK! Join Date: Jun 2008 Location: NA Age: 40 Posts: 1,342 Trader Rating: (0) Feedback Score: 0 reviews	JGS tools will have what you need, turbo gasket RTV. Works.

04-26-2009, 11:02 AM	#9
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	GSX, it was on the 3-bolt outlet

04-26-2009, 05:55 PM	#11
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	i found a leak in the IC piping..fixed it & am awaiting comprehensive results

04-27-2009, 04:53 PM	#12
ZakS13 Zilvia Member Join Date: May 2007 Location: Bay City, MI Age: 35 Posts: 193 Trader Rating: (3) Feedback Score: 3 reviews	confirmed it to be a boost tiny boost leak. Thanks everyone!