Whining/Screaming

[ZakS13]

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]

still sounds to me like a boost leak.

[GSXRJJordan]

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]

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

[ZakS13]

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]

turbo death whine...? - Supraforums.com (http://www.supraforums.com/forum/showthread.php?p=3298750)

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

[GSXRJJordan]

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]

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

[ZakS13]

GSX, it was on the 3-bolt outlet

[GSXRJJordan]

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]

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

[ZakS13]

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