Whine then hissing after turning car off (video)
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Car: 89GTA Black, Black cloth
Engine: LB9 26,000 miles
Transmission: T5
Axle/Gears: 3.45 Australian 9 bolt
Re: Whine then hissing after turning car off (video)
LOL thats crazy never heard something like that
#4
Re: Whine then hissing after turning car off (video)
Could be a vacuum leak. The vacuum reservoir is supposed to retain vacuum beyond the check valve, but if something is leaking that might be the result.
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Car: 1987 Trans am
Engine: 350 Vortec Stealth Ram
Transmission: T-5
Axle/Gears: 02 SS Torsen Zexel 3.42
Re: Whine then hissing after turning car off (video)
Discovered I have just shy of 90 psi in cylinder 4 during compression test. Haven't found what that noise was, but wondering if this could be a cause? I'll plug off all vacuum at the intake to bypass the HVAC and what not, see if that is it.
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Car: 1983 G20 Chevy
Engine: 305 TPI
Transmission: 4L60
Axle/Gears: 14 bolt with 3.07 gears
Re: Whine then hissing after turning car off (video)
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Car: 1987 Trans am
Engine: 350 Vortec Stealth Ram
Transmission: T-5
Axle/Gears: 02 SS Torsen Zexel 3.42
Re: Whine then hissing after turning car off (video)
Just wanted to update. I have since swapped to a vortec 350 with stealth ram and don't hear this anymore. When I tore the engine down, almost half the pistons had broken ring lands. That may have had something to do with it.
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