Turbo Chirping But Still Producing Boost

[pwuser162557941033]

The turbo on my Suzuki Jimny seems to be making chirping, whistling noises at the beginning of its boost range, at around 0 - 2 psi. It's an IHI RHB31 turbo with a VZ9 housing.

It does not make any noise apart from the normal spooling sound after 2 psi, develops 10psi under WOT, 7-9psi under moderate to heavy load. It behaves completely normally otherwise. I have a BOV installed instead of a diverter/recirc valve.

I suspect it might be a gasket seal failure on either the intake or exhaust side of the compressor, vibrating and causing it to behave like a reed. Or is my turbo close to failure?

[syncview]

it could very well be a gasket failure on the exhaust side of things specially if the sound is shrill and loud.

[pwuser162557941033]

Yes that sounds like it. I'll see if I can find a new gasket set, replace, and report back. By the way, Osama, do you have any ideas about where I could find a replacement turbo, new, used good condition? Or a reputable turbo workshop?

[syncview]

Which city?

[pwuser162557941033]

I'm in Karachi. If you have any legitimate references in Lahore, though, and I need to have my turbo worked on in the future, I'd be willing to ship it there.